Steering limiter, steering system and road marking machine

Abstract

The utility model discloses a steering limiter, a steering system and a road marking machine, the steering limiter is connected with the steering system of the road marking machine, the steering limiter is used for limiting the rotation angle of the steering system, and the steering limiter comprises a shell, a limiting device and a driving device, the transmission shaft is movably connected with the shell in a sleeving mode in the first direction, and the transmission shaft is in transmission connection with the steering system; the limiting shaft is movably connected with the shell in a sleeving mode in the second direction, the limiting shaft is in meshing transmission with the transmission shaft, and the first direction is perpendicular to the second direction; and the limiting part is arranged on the side, in the second direction, of the shell, the limiting part is connected with the limiting shaft in a sleeving mode, and the limiting part is used for limiting the rotation angle of the limiting shaft. According to the steering limiter, the steering system and the road marking machine, the steering precision and stability of the road marking machine can be effectively improved, and the operability of technicians is synchronously improved.

Description

Technical Field

[0001] This utility model relates to the field of road marking machine steering technology, and in particular to a steering limiter, steering system and road marking machine. Background Technology

[0002] In related technologies, with the rapid development of transportation infrastructure and the continuous increase in road mileage, the requirements for the construction efficiency and quality of road markings are also increasing. The application scenarios of road marking machines are no longer limited to traditional highways and parking lots, but have expanded to various complex road conditions such as airport runways, highway ramps, and urban expressways. Different application scenarios place different demands on the steering performance of road marking machines. For example, in mountainous roads with many curves or narrow parking lot passages, marking machines need to achieve more flexible and precise steering.

[0003] However, existing road marking machines have low steering accuracy and poor stability, and require highly skilled operators. 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 steering limiter. This steering limiter can effectively improve the steering accuracy and stability of road marking machines, and simultaneously improve the operability for technicians.

[0005] Another objective of this invention is to propose a steering system.

[0006] Another objective of this invention is to provide a road marking machine.

[0007] According to the present invention, a steering limiter is connected to the steering system of a road marking machine, and the steering limiter is used to limit the rotation angle of the steering system. The steering limiter includes:

[0008] case;

[0009] A drive shaft is movably sleeved with the housing along a first direction, and the drive shaft is connected to the steering system in a transmission manner.

[0010] A limiting shaft is movably sleeved with the housing along a second direction, and the limiting shaft meshes with the transmission shaft for transmission, wherein the first direction is perpendicular to the second direction;

[0011] A limiting part is provided on one side of the housing along the second direction. The limiting part is sleeved with the limiting shaft and is used to limit the rotation angle of the limiting shaft.

[0012] According to the steering limiter provided in this embodiment of the utility model, the housing provides structural support for the steering limiter, thereby protecting its internal components from environmental damage and improving its stability and safety. The transmission shaft ensures accurate transmission of steering commands, significantly improving the reliability and stability of steering operations, enabling the road marking machine to complete its marking tasks efficiently and accurately. The limiting shaft not only accurately transmits steering actions and limits the steering angle to ensure steering precision, but also, through its interaction with reduction gears, reduces rotational speed and increases torque, making the road marking machine's steering smoother and easier, ensuring stable driving. The limiting part restricts the rotation angle of the limiting shaft, thereby allowing adjustment of the road marking machine's steering angle.

[0013] In some examples of this utility model, the limiting part has a through hole, a limiting protrusion is provided inside the through hole, one end of the limiting shaft is movably sleeved in the through hole, and a limiting key corresponding to the limiting protrusion is provided on the side wall of the limiting shaft. The limiting key is used to abut against the limiting protrusion to limit the rotation angle of the limiting shaft.

[0014] In some examples of this utility model, the periphery of the housing is provided with multiple heat dissipation ribs.

[0015] According to the steering system proposed in this utility model, the steering system is connected to the frame of the road marking machine, and the steering system is used to control the driving direction of the road marking machine. The steering system includes:

[0016] Steering wheel assembly;

[0017] A universal joint, one end of which is connected to the steering wheel assembly;

[0018] A steering limiter, wherein the other end of the universal joint is connected to the drive shaft of the steering limiter, and the steering limiter is a steering limiter according to any one of the above.

[0019] A steering motor is provided, with its shaft connected to the other end of the drive shaft. The steering motor is electrically connected to the chassis of the road marking machine. The steering wheel assembly sends steering commands to the chassis via the steering motor to control the driving direction of the road marking machine.

[0020] In some examples of this utility model, the steering motor has an angle sensor, which is disposed corresponding to the other end of the rotating shaft opposite to the drive shaft. The angle sensor is used to measure and send the rotation angle of the steering wheel assembly to the chassis.

[0021] In some examples of this utility model, the steering wheel assembly includes:

[0022] steering wheel;

[0023] A connecting shaft, one end of which is connected to the steering wheel, and the other end of which is connected to the universal joint;

[0024] A bushing is provided, which is connected to the frame of the road marking machine. The bushing is coaxial and movably sleeved on the outside of the connecting shaft.

[0025] In some examples of this utility model, a connecting plate is fitted on the outer side of the bushing, and the steering wheel assembly is fixedly connected to the vehicle frame through the connecting plate.

[0026] In some examples of this utility model, universal joints are provided at opposite ends of the universal shaft, and the universal shaft is connected to the steering wheel assembly and the steering limiter respectively through the universal joints.

[0027] In some examples of this utility model, the steering system further includes an adjusting support, one end of which is fixedly connected to the drive shaft of the steering limiter, and the universal joint is drivenly connected to the steering limiter through the adjusting support.

[0028] The road marking machine according to this utility model includes:

[0029] Chassis;

[0030] The vehicle frame is connected to the chassis.

[0031] A steering system, which is connected to the vehicle frame, wherein the steering system includes the steering system described above.

[0032] 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

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the steering limiter provided according to the present invention;

[0035] Figure 2 This is a structural schematic diagram of the steering limiter provided by this utility model from another angle;

[0036] Figure 3 This is a schematic diagram of the steering system provided according to the present invention;

[0037] Figure 4 This is a partial structural schematic diagram of the road marking machine provided according to this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1- Road marking machine;

[0040] 10-Steering system;

[0041] 100-Steering limiter; 110-Housing; 120-Drive shaft; 130-Limiting shaft; 131-Limiting key; 140-Limiting part; 141-Through hole; 1411-Limiting protrusion; 150-Heat dissipation rib;

[0042] 200 - Steering wheel assembly; 210 - Steering wheel; 220 - Connecting shaft; 230 - Bushing; 231 - Connecting plate;

[0043] 300-Universal Shaft;

[0044] 400 - Steering motor; 410 - Angle sensor;

[0045] 500-Universal Joint;

[0046] 600-Adjustable support;

[0047] 20-Chassis;

[0048] 30 - Frame. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0050] 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," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not 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. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0051] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0052] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0053] Figure 1 This is a schematic diagram of the steering limiter provided according to the present invention; Figure 2 This is a structural schematic diagram of the steering limiter provided by this utility model from another angle; Figure 3 This is a schematic diagram of the steering system provided according to the present invention; Figure 4 This is a partial structural schematic diagram of the road marking machine provided according to this utility model.

[0054] The following is for reference. Figures 1-4The present invention describes a steering limiter 100, which is connected to the steering system 10 of a road marking machine 1. The steering limiter 100 is used to limit the rotation angle of the steering system 10. The steering limiter 100 includes: a housing 110; a drive shaft 120, which is movably sleeved with the housing 110 along a first direction and is drively connected to the steering system 10; a limiting shaft 130, which is movably sleeved with the housing 110 along a second direction and is engaged with the drive shaft 120, wherein the first direction is perpendicular to the second direction; and a limiting part 140, which is disposed on one side of the housing 110 along the second direction and is sleeved with the limiting shaft 130, and is used to limit the rotation angle of the limiting shaft 130.

[0055] Specifically, the housing 110 can be constructed as a rectangular structure, and the construction material of the housing 110 can be a metallic material, such as cast iron or stainless steel. Cast iron has good castability, shock absorption, and wear resistance; stainless steel has good corrosion resistance and high hardness. This can effectively improve the overall strength of the housing 110, thereby significantly extending the service life of the steering limiter 100. The housing 110 can provide structural support for the steering limiter 100, and the housing 110 can form a semi-enclosed space, thereby protecting the interior of the steering limiter 100 from environmental damage, and thus improving the stability and safety of the steering limiter 100.

[0056] The drive shaft 120 can be constructed as an irregular cylindrical structure. The drive shaft 120 can be movably connected to the housing 110 via a coaxial sleeve 230. This configuration facilitates rotation of the drive shaft 120 in a first direction, which can be... Figure 1 The direction indicated by X in the figure. A reduction gear (not shown in the figure) is installed inside the housing 110. The drive shaft 120 is connected to the reduction gear via a worm gear connection. One end of the drive shaft 120 can be connected to the steering system 10 via the adjusting support 600 in the following embodiment. With this configuration, when the steering system 10 sends a steering command to the steering limiter 100, the steering command can be transmitted to the drive shaft 120, and then from the drive shaft 120 to the steering motor 400 in the following embodiment. By setting the drive shaft 120, the accurate transmission of steering commands can be ensured, thereby enabling precise steering of the road marking machine 1. The drive shaft 120 can significantly improve the reliability and stability of steering operations, enabling the road marking machine 1 to complete the marking task efficiently and accurately.

[0057] The limiting shaft 130 can be constructed as an irregular stepped cylindrical structure. The limiting shaft 130 can be movably connected to the reduction gear inside the housing 110 via a coaxial sleeve 230, passing through both ends of the housing 110 along a second direction. This facilitates the rotation of the limiting shaft 130 within the housing 110 around the second direction, which can be... Figure 1 The direction indicated by Y in the diagram. The limiting shaft 130 can abut against the inner wall of the reduction gear. With this configuration, when the steering limiter 100 receives the steering action from the steering system 10, the transmission shaft 120 can rotate in the first direction, thereby driving the reduction gear to rotate in the second direction, which in turn drives the limiting shaft 130 to rotate in the second direction. By setting the limiting shaft 130, not only can the steering action be accurately transmitted, limiting the steering angle and ensuring steering precision, but it can also reduce the speed and increase the torque by cooperating with the reduction gear, making the steering of the road marking machine 1 smoother and easier, ensuring stable driving.

[0058] The limiting part 140 can be constructed as a disc structure. The limiting part 140 can be fixedly installed on one side of the housing 110 by means of threaded connection. Along the second direction of the housing 110, the limiting part 140 can be movably connected to one end of the limiting shaft 130 by means of sleeve connection. With this configuration, the limiting part 140 can limit the rotation angle of the limiting shaft 130, thereby adjusting the steering angle of the road marking machine 1.

[0059] The cross-sectional shape of the limiting part 140 should be slightly smaller than the cross-sectional shape of the housing 110 along the second direction. This can greatly improve the stability of the steering limiter 100 and prevent the limiting part 140 from colliding with other components and being damaged during operation.

[0060] According to the steering limiter 100 provided in this embodiment of the present invention, the housing 110 provides structural support for the steering limiter 100, thereby protecting the interior of the steering limiter 100 from environmental damage and improving the stability and safety of the steering limiter 100. The transmission shaft 120 ensures accurate transmission of steering commands, greatly improving the reliability and stability of steering operations, enabling the road marking machine 1 to complete the marking task efficiently and accurately. The limiting shaft 130 not only accurately transmits steering actions and limits the steering angle to ensure steering accuracy, but also reduces the rotational speed and increases the torque by cooperating with the reduction gear, making the steering of the road marking machine 1 smoother and easier, and ensuring driving stability. The limiting part 140 limits the rotation angle of the limiting shaft 130, thereby adjusting the steering angle of the road marking machine 1.

[0061] Please continue reading Figures 1-2As shown, the limiting part 140 has a through hole 141, and a limiting protrusion 1411 is provided inside the through hole 141. One end of the limiting shaft 130 is movably sleeved in the through hole 141. A limiting key 131 corresponding to the limiting protrusion 1411 is provided on the side wall of the limiting shaft 130. The limiting key 131 is used to abut against the limiting protrusion 1411 to limit the rotation angle of the limiting shaft 130.

[0062] Specifically, a through hole 141 can be provided at the center of the limiting part 140. The diameter of the through hole 141 should be slightly larger than the cross-sectional diameter of the limiting shaft 130. This arrangement facilitates the free rotation of the limiting shaft 130 within the through hole 141. The limiting protrusion 1411 can be fixedly installed inside the through hole 141 by welding or integral molding. The limiting part 140 can limit the maximum steering angle of the steering limiter 100 through the limiting protrusion 1411, thereby ensuring the safety of the steering limiter 100.

[0063] The limit key 131 can be fixedly installed on the side wall of the limit shaft 130 by welding or integral molding. It should be noted that the structure of the limit key 131 should match the limit protrusion 1411. This setting makes it easy for the limit key 131 to abut against the limit protrusion 1411 to limit the maximum steering angle of the steering limiter 100, thereby limiting the maximum steering angle of the road marking machine 1 and greatly improving the stability and safety of the road marking machine 1.

[0064] Please continue reading Figure 1 and Figure 2 As shown, according to one embodiment of the present invention, a plurality of heat dissipation ribs 150 are provided on the periphery of the housing 110.

[0065] Specifically, the heat dissipation ribs 150 can be uniformly arranged around the periphery of the housing 110 through an integrally formed connection. The heat dissipation ribs 150 can be spaced out to form convection airflow, thereby increasing the heat dissipation area of ​​the housing 110 and significantly improving the heat dissipation efficiency. By setting the heat dissipation ribs 150, local overheating of the housing 110 can be avoided, reducing thermal stress and deformation problems caused by excessive temperature differences, thereby improving the structural integrity and performance of the steering limiter 100.

[0066] Please continue reading Figure 3 and Figure 4As shown, according to an embodiment of the present invention, the steering system 10 is connected to the frame 30 of the road marking machine 1. The steering system 10 is used to control the driving direction of the road marking machine 1. The steering system 10 includes: a steering wheel assembly 200; a universal joint 300, one end of which is connected to the steering wheel assembly 200; a steering limiter 100, the other end of which is connected to the drive shaft 120 of the steering limiter 100, the steering limiter 100 being the aforementioned steering limiter 100; and a steering motor 400, the shaft of which is connected to the other end of the drive shaft 120. The steering motor 400 is electrically connected to the chassis 20 of the road marking machine 1. The steering wheel assembly 200 sends steering commands to the chassis 20 through the steering motor 400 to control the driving direction of the road marking machine 1.

[0067] Specifically, the steering wheel assembly 200 can precisely transmit the user's steering commands to the chassis 20 through mechanical transmission, thereby adjusting the wheel deflection angle in real time to control the driving direction of the road marking machine 1, reducing the operating load, and simultaneously improving the convenience and safety of driving, ensuring the stable operation and dynamic response of the road marking machine 1 under complex road conditions.

[0068] The universal joint 300 can be constructed as a cylindrical structure. The construction material of the universal joint 300 can be a metallic material, such as aluminum alloy. Aluminum alloy has advantages such as high strength, lightweight, and corrosion resistance, thereby improving the strength of the universal joint 300. One end of the universal joint 300 can be connected to the steering wheel assembly 200 via the universal joint 500 in the following embodiment. This configuration allows the mechanical transmission of the steering wheel assembly 200 to be transmitted to the universal joint 300, and then from the universal joint 300 to the steering limiter 100.

[0069] The drive shaft 120 of the steering limiter 100 can be movably connected to the other end of the universal joint 300 via the universal joint 500. With this configuration, when the user rotates the steering wheel assembly 200, the universal joint 300 rotates, which in turn rotates the drive shaft 120 of the steering limiter 100, thereby achieving directional control of the road marking machine 1. The specific structure and working principle of the steering limiter 100 have been explained in detail in the above embodiments and will not be repeated here.

[0070] The steering motor 400 can be configured as a servo motor. The shaft of the steering motor 400 (not shown in the figure) can be fixedly connected to the other end of the drive shaft 120 via a coaxial connection. With this configuration, the steering wheel assembly 200 can rotate to drive the shaft of the steering motor 400 to rotate. The steering motor 400 can be electrically connected to the chassis 20 of the road marking machine 1 via a wired connection. With this configuration, the steering motor 400 can transmit the steering command of the steering limiter 100 to the chassis 20, so that the chassis 20 can rotate at the corresponding angle, thereby controlling the steering of the road marking machine 1.

[0071] Please continue reading Figure 3 and Figure 4 As shown, according to another embodiment of the present invention, the steering motor 400 has an angle sensor 410, which is disposed corresponding to the other end of the rotating shaft opposite to the transmission shaft 120. The angle sensor 410 is used to measure and send the rotation angle of the steering wheel assembly 200 to the chassis 20.

[0072] Specifically, the angle sensor 410 can be fixedly installed with the steering motor 400 by means of a threaded connection. The angle sensor 410 can be set at the other end of the rotating shaft opposite to the drive shaft 120. With this setting, the angle sensor 410 can detect the rotation angle of the steering wheel assembly 200 in real time and send the rotation angle data to the chassis 20, thereby realizing closed-loop feedback and dynamic calibration of steering commands, and ensuring precise control of the steering angle of the road marking machine 1.

[0073] Please continue reading Figure 3 As shown, according to another embodiment of the present invention, the steering wheel assembly 200 includes: a steering wheel 210; a connecting shaft 220, one end of which is connected to the steering wheel 210 and the other end of which is connected to the universal joint 300; and a bushing 230, which is connected to the frame 30 of the road marking machine 1 and is coaxially and movably sleeved on the outside of the connecting shaft 220.

[0074] Specifically, the steering wheel 210 can be constructed as a circular or slightly flat-bottomed ring. The ring structure of the steering wheel 210 can be wrapped in a soft material with a certain degree of friction, such as leather, microfiber, or other synthetic materials, thereby improving grip comfort and anti-slip performance. The ring structure of the steering wheel 210 can be constructed with three spokes extending from the outer edge of the steering wheel 210 towards the center, evenly distributed on the upper, left, and right sides of the steering wheel 210, forming three support arms. When the user holds different spokes with both hands, small-scale steering adjustments can be easily made, thereby improving the steering accuracy of the road marking machine 1.

[0075] The connecting shaft 220 can be constructed as a stepped cylindrical structure. One end of the connecting shaft 220 can be fixedly connected to the center position of the steering wheel 210 by means of a threaded connection. The other end of the connecting shaft 220 can be connected to the universal joint 500 and the universal shaft 300 through a transmission connection. With this configuration, the connecting shaft 220 can transmit the steering command of the steering wheel 210 to the connecting shaft 220, and then the connecting shaft 220 can transmit it to the universal shaft 300, thereby realizing the transmission of torque of the steering wheel 210.

[0076] The bushing 230 can be constructed as a hollow cylindrical structure. The bushing 230 can be movably fitted onto the outside of the connecting shaft 220 via a connection with the bushing 230. This configuration provides mechanical protection for the connecting shaft 220, significantly improving the safety of the steering wheel assembly 200. The outer side of the bushing 230 can be fixedly connected to the frame 30 of the road marking machine 1 via a threaded connection or welding. This configuration provides stable support for the steering wheel assembly 200, thereby improving the stability of the steering system 10.

[0077] Please continue reading Figure 3 and Figure 4 As shown, according to an optional embodiment of the present invention, a connecting plate 231 is sleeved on the outer side of the bushing 230, and the steering wheel assembly 200 is fixedly connected to the vehicle frame 30 through the connecting plate 231.

[0078] Specifically, the connecting plate 231 can be constructed as an irregular disc-shaped structure with through holes 141. The connecting plate 231 can be coaxially fitted onto the outside of the bushing 230. The connecting plate 231 can also be fixedly connected to the frame 30 of the road marking machine 1 by threaded connection or welding. With this configuration, the steering wheel assembly 200 can be fixedly connected to the frame 30 through the connecting plate 231, thereby ensuring the stability and safety of the steering wheel assembly 200 when the road marking machine 1 is in motion.

[0079] Please continue reading Figure 3 and Figure 4 As shown, according to a further embodiment of the present invention, universal joints 500 are respectively provided at opposite ends of the universal shaft 300, and the universal shaft 300 is connected to the steering wheel assembly 200 and the steering limiter 100 through the universal joints 500.

[0080] The universal joint 500 can be constructed as a cross-shaped structure, which facilitates compensation for spatial and angular deviations between the steering wheel assembly 200 and the steering limiter 100, thereby enabling precise control of the steering of the road marking machine 1. The steering wheel assembly 200 can be connected to one end of the universal joint 300 via the universal joint 500, allowing the steering action of the steering wheel 210 to be precisely transmitted to the universal joint 300. The other end of the universal joint 300 can be connected to the drive shaft 120 of the steering limiter 100 via the universal joint 500, ensuring that the steering action of the universal joint 300 is accurately transmitted to the steering limiter 100, thus achieving precise steering of the road marking machine 1. The universal joint 500 design balances the transmission efficiency and flexibility of the steering system 10, improving its reliability and stability, and providing users with a precise and smooth steering experience.

[0081] Please continue reading Figure 3 As shown, in an optional embodiment of this utility model, the steering system 10 further includes an adjusting support 600, one end of which is fixedly connected to the drive shaft 120 of the steering limiter 100, and the universal joint 300 is connected to the steering limiter 100 via the adjusting support 600.

[0082] Specifically, the adjusting support 600 can be fixedly connected to the drive shaft 120 via bolts and nuts. This ensures stable and reliable power and movement transmission between the adjusting support 600 and the drive shaft 120, and facilitates disassembly and maintenance. The universal joint 300 is connected to the steering limiter 100 via the adjusting support 600. The universal joint 300 is connected to the drive shaft 120 via the universal joint 500, effectively compensating for relative displacement between components in the steering system 10, while ensuring the continuity and stability of torque transmission in the steering wheel 210. With this configuration, the road marking machine 1 can precisely limit the steering angle when driving on uneven surfaces, preventing oversteering, ensuring the maneuverability and safety of the road marking machine 1, and providing users with a stable and reliable steering experience.

[0083] Please continue reading Figure 4 As shown, the road marking machine 1 according to an embodiment of the present utility model includes: a chassis 20; a frame 30, the frame 30 being connected to the chassis 20; and a steering system 10, the steering system 10 being connected to the frame 30, the steering system 10 being the aforementioned steering system 10.

[0084] Specifically, the chassis 20 can be constructed as a box-frame structure, and the structural material of the chassis 20 can be a metal material, such as structural steel. Structural steel has strong impact resistance, which can significantly improve the load-bearing capacity of the chassis 20. The chassis 20 is responsible for supporting the various components of the road marking machine 1, and can provide stable support for the road marking machine 1 to ensure the smooth operation of the road marking machine 1 under different road conditions.

[0085] The frame 30 can be constructed as a truss-type spatial structure. The frame 30 can be fixedly connected to the chassis 20 by bolts, which allows the chassis 20 to provide stable support for the frame 30, thereby improving the stability and safety of the road marking machine 1. The frame 30 can provide stable support for the steering system 10, thereby ensuring the stability and safety of the steering system 10 during operation.

[0086] The steering system 10 can be vertically fixed to the front of the frame 30 via a threaded connection. When the user turns the steering wheel 210, the steering system 10 accurately converts this action into wheel deflection, enabling the road marking machine 1 to steer flexibly. The steering system 10 has been described in detail in the above embodiments and will not be repeated here.

[0087] Other components of the steering limiter 100, steering system 10, and road marking machine 1 according to the embodiments of the present invention, such as reduction gears, worm gears, threaded connections, etc., as well as their operation, are known to those skilled in the art and will not be described in detail here.

[0088] 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., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0089] 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 steering limiter, characterized in that, The steering limiter is connected to the steering system of the road marking machine, and the steering limiter is used to limit the rotation angle of the steering system. The steering limiter includes: case; A drive shaft is movably sleeved with the housing along a first direction, and the drive shaft is connected to the steering system in a transmission manner. A limiting shaft is movably sleeved with the housing along a second direction, and the limiting shaft meshes with the transmission shaft for transmission, wherein the first direction is perpendicular to the second direction; A limiting part is provided on one side of the housing along the second direction. The limiting part is sleeved with the limiting shaft and is used to limit the rotation angle of the limiting shaft.

2. The steering limiter according to claim 1, characterized in that, The limiting part has a through hole, and a limiting protrusion is provided on the inner side of the through hole. One end of the limiting shaft is movably sleeved in the through hole. A limiting key corresponding to the limiting protrusion is provided on the side wall of the limiting shaft. The limiting key is used to abut against the limiting protrusion to limit the rotation angle of the limiting shaft.

3. The steering limiter according to claim 1, characterized in that, The periphery of the housing is provided with multiple heat dissipation ribs.

4. A steering system, characterized in that, The steering system is connected to the frame of the road marking machine, and the steering system is used to control the driving direction of the road marking machine. The steering system includes: Steering wheel assembly; A universal joint, one end of which is connected to the steering wheel assembly; A steering limiter, wherein the other end of the universal joint is connected to the drive shaft of the steering limiter, and the steering limiter is a steering limiter according to any one of claims 1-3; A steering motor is provided, with its shaft connected to the other end of the drive shaft. The steering motor is electrically connected to the chassis of the road marking machine. The steering wheel assembly sends steering commands to the chassis via the steering motor to control the driving direction of the road marking machine.

5. The steering system of claim 4, wherein, The steering motor has an angle sensor, which is disposed corresponding to the other end of the rotating shaft opposite to the drive shaft. The angle sensor is used to measure and send the rotation angle of the steering wheel assembly to the chassis.

6. The steering system of claim 4, wherein, The steering wheel assembly includes: steering wheel; A connecting shaft, one end of which is connected to the steering wheel, and the other end of which is connected to the universal joint; A bushing is provided, which is connected to the frame of the road marking machine. The bushing is coaxial and movably sleeved on the outside of the connecting shaft.

7. The steering system according to claim 6, characterized in that, A connecting plate is fitted on the outer side of the bushing, and the steering wheel assembly is fixedly connected to the vehicle frame through the connecting plate.

8. The steering system of claim 4, wherein, Universal joints are provided at opposite ends of the universal shaft, and the universal shaft is connected to the steering wheel assembly and the steering limiter through the universal joints.

9. The steering system of claim 6, wherein, It also includes an adjusting support, one end of which is fixedly connected to the drive shaft of the steering limiter, and the universal joint is connected to the steering limiter through the adjusting support.

10. A road marking machine, characterized in that, include: Chassis; The vehicle frame is connected to the chassis. A steering system connected to the vehicle frame, wherein the steering system is a steering system according to any one of claims 4-9.

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