Tractor front axle steering angle sensor mounting structure

Abstract

The utility model relates to a tractor front axle steering angle sensor mounting structure, which is characterized in that an angle sensor is connected with a front wheel steering knuckle through a steering knuckle main pin, the steering knuckle main pin is provided with a spigot positioning hole, the angle sensor is provided with a positioning spigot, and the positioning spigot is connected with the spigot positioning hole; the first positioning pin hole of the steering knuckle main pin is connected with the second positioning pin hole of the sensor body through a positioning pin; the bottom of the sensor rotating shaft is in limiting connection with the front axle shell. According to the front axle steering structure, the spigot positioning hole is matched with the positioning spigot, and the first positioning pin hole is matched with the second positioning pin hole, so that the steering angle sensor and the steering knuckle main pin can be quickly positioned and mounted, the problems of inconvenience in mounting and poor stability are solved, and a fragile movable part of the steering angle sensor is arranged in the front axle steering structure, so that the steering angle sensor can be quickly positioned and mounted. The sensor is protected, and the structural reliability is greatly improved; and the external part of the steering angle sensor is small in size, so that the risk that the steering angle sensor interferes with peripheral components such as a fender assembly can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of tractor front wheel steering angle detection, specifically, to a tractor front axle steering angle sensor mounting structure. Background Technology

[0002] In the wave of the booming development of modern agriculture, tractors, as the core machinery of agricultural production, are making great strides towards intelligence and precision. Steering angle sensors play a crucial role in this process. Like the "sensory nerves" of the tractor, they are responsible for accurately capturing the steering angle of the front wheels, thus providing key data support for automated steering control.

[0003] Existing steering angle sensors mostly employ a relatively simple combination of mechanical structures and sensing elements. Common types include potentiometer-type steering angle sensors, which utilize the principle of a potentiometer and are connected to the steering system via a mechanical linkage. As the front wheels turn, the brushes of the potentiometer slide on a resistive plate, and the steering angle is calculated based on the change in resistance. There are also photoelectric steering angle sensors, which use a photoelectric encoder to convert the blocking and transmission of light into electrical pulse signals, thereby determining the steering angle.

[0004] However, regardless of the type of steering angle sensor used, the importance of sensor installation is often overlooked. Most of the installation structures are simple and crude, relying solely on bolt tightening. This results in problems such as inconvenient installation and poor stability of steering angle sensor installation structures, which limits their effectiveness in practical applications. Utility Model Content

[0005] To address the problems of inconvenient installation and poor stability in existing steering angle sensor mounting structures, this utility model provides a tractor front axle steering angle sensor mounting structure.

[0006] The technical solution of this utility model is as follows:

[0007] A tractor front axle steering angle sensor mounting structure is disclosed for mounting a steering angle sensor at the connection between the tractor's front axle housing and the front wheel steering knuckle to measure front wheel steering. The structure includes a steering knuckle kingpin, which has a locating hole, a first locating pin hole, and several first threaded holes. The bottom of the steering angle sensor has a protruding locating stop, and the center of the locating stop has a sensor shaft that can rotate relative to the locating stop. A second locating pin hole and several second threaded holes are provided on the side of the locating stop. The locating stop is inserted into the locating hole, the second locating pin hole is connected to the first locating pin hole via a locating pin, and the several second threaded holes are connected to the corresponding several first threaded holes via bolts. The steering knuckle kingpin is fixedly connected to the front wheel steering knuckle, and the bottom of the sensor shaft passes through the locating hole and is limited and connected to the front axle housing.

[0008] By adopting the above technical solution, when the tractor performs a steering operation, the front wheel steering knuckle rotates, and the steering knuckle kingpin, which is fixedly connected to it, rotates synchronously. Since the sensor body of the steering angle sensor is firmly connected to the steering knuckle kingpin through locating pins and bolts, the sensor body rotates together with the steering knuckle kingpin. The bottom of the sensor shaft is limited and connected to the front axle housing. In this way, with the rotation of the steering knuckle kingpin, a relative rotation occurs between the sensor body and the relatively stationary sensor shaft. Through the precise sensing mechanism inside the sensor, the real-time steering angle of the tractor's front wheels is accurately measured.

[0009] As a preferred embodiment of this utility model, the top radial direction of the steering knuckle kingpin is greater than that of the bottom and forms a connecting plate. The connecting plate is provided with several bolt holes, and the upper connecting lug of the front wheel steering knuckle is connected to the bottom of the connecting plate by bolts. The bottom of the steering knuckle kingpin is rotatably inserted into the front axle housing, and the upper connecting lug is located between the connecting plate and the front axle housing.

[0010] By adopting the above technical solution, the upper connecting ear of the front wheel steering knuckle fits against the connecting disc of the steering knuckle kingpin. By using bolts to pass through the bolt holes on the connecting disc, the front wheel steering knuckle and the steering knuckle kingpin can be easily and securely assembled together. When the tractor performs a steering operation, the front wheel steering knuckle is subjected to force and begins to rotate. Since it is rigidly connected to the connecting disc of the steering knuckle kingpin through bolts, it drives the steering knuckle kingpin to rotate synchronously.

[0011] Preferably, the connecting plate has three bolt holes, and the three bolt holes are distributed in a triangular pattern.

[0012] As a preferred embodiment of this utility model, the stop positioning hole is located at the central axis of the steering knuckle kingpin, and a first positioning pin hole and two first screw holes are provided on the side of the stop positioning hole.

[0013] Furthermore, one of the first screw holes is located on one side of the stop positioning hole, and the other first screw hole and the first positioning pin hole are located on the other side of the stop positioning hole, and the two first screw holes are symmetrically distributed.

[0014] As a preferred embodiment of this utility model, the bottom of the sensor shaft is connected to an extension shaft via a coupling, and the central axis of the sensor shaft is aligned with the central axis of the extension shaft.

[0015] Furthermore, the bottom of the extension shaft is inserted into the front axle housing and is limitedly connected to the front axle housing.

[0016] As a preferred embodiment of this utility model, a protective cover is installed on the connecting disc of the steering knuckle kingpin, and the protective cover is placed on top of the steering angle sensor.

[0017] Furthermore, the connecting plate is symmetrically provided with two third screw holes, and the protective cover is installed and fixed to the third screw holes by bolts.

[0018] The advantages of this utility model based on the above solution are as follows:

[0019] This utility model adds a stop positioning hole and a first positioning pin hole to the steering knuckle kingpin. In actual installation, the operator only needs to align the sensor body with the steering knuckle kingpin and push the locating stop into the stop positioning hole to quickly complete the initial positioning, so that the sensor shaft and the steering knuckle kingpin are coaxial. Then, the positioning pin is first inserted into the second positioning pin hole of the sensor body, and then the second positioning pin hole is aligned with the first positioning pin hole to install the steering angle sensor and the steering knuckle kingpin. Finally, the corresponding second screw hole and first screw hole are tightened with bolts. The whole process is simple and easy to operate, solving the problem of inconvenient installation.

[0020] Furthermore, the installation structure is stable, allowing the steering knuckle kingpin to rotate steadily with the sensor body, while the sensor shaft remains stationary due to its limiting connection with the front axle housing. The sensor body and the sensor shaft maintain stable relative rotation, accurately acquiring the front wheel steering angle data. Even during long-term, high-intensity operation, the steering angle sensor will not loosen or shift, completely overcoming the problem of poor stability. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of the locating pin section;

[0023] Figure 3This is a schematic diagram of the steering angle sensor in this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the steering knuckle kingpin in this utility model;

[0025] Figure 5 This is a schematic diagram of the extension shaft in this utility model.

[0026] In the diagram: 1. Protective cover; 2. Steering angle sensor; 201. Sensor body; 202. Positioning stop; 203. Sensor shaft; 204. Second positioning pin hole; 205. Second screw hole; 3. Positioning pin; 4. Coupling; 5. Extension shaft; 501. D-head; 6. Front axle housing; 7. Steering knuckle kingpin; 701. Stop positioning hole; 702. First positioning pin hole; 703. Connecting disc; 7031. Third screw hole; 704. First screw hole; 8. Front wheel steering knuckle; 81. Upper connecting lug; 82. Lower connecting lug. Detailed Implementation

[0027] To better understand the purpose, technical solution, and technical effects of this utility model, the following description, in conjunction with the accompanying drawings and embodiments, will provide further explanation. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need further definition and explanation in subsequent drawings. It is also stated that the embodiments described below are only for explaining this utility model and are not intended to limit it.

[0028] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0029] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] The terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of technical features. “Several” means two or more, unless otherwise expressly and specifically defined.

[0031] like Figures 1 to 5 As shown, a tractor front axle steering angle sensor mounting structure is provided for mounting a steering angle sensor 2 at the connection between the tractor's front axle housing 8 and the front wheel steering knuckle 6 to measure the front wheel steering. The tractor front axle steering angle sensor mounting structure includes a steering knuckle kingpin 7, which is fixedly connected to the upper connecting lug 81 of the front wheel steering knuckle 8 and rotatably connected to the front axle housing 6. The steering angle sensor 2 includes a relatively rotatable sensor body 201 and a sensor shaft 203. The sensor body 201 is fixedly connected to the steering knuckle kingpin 7, and the bottom of the sensor shaft 203 is limitedly connected to the front axle housing 6. When the front wheel steering knuckle 8 drives the steering knuckle kingpin 7 to rotate, it drives the sensor body 201 to rotate. Since the sensor shaft 203 is relatively stationary with respect to the front axle housing 6 and does not rotate, a relative rotation occurs between the sensor body 201 and the sensor shaft 203, thereby measuring the tractor's front wheel steering angle.

[0032] To better address the issues of inconvenient installation and poor stability of the steering angle sensor 2 mounting structure, the steering knuckle kingpin 7 is provided with a stop positioning hole 701, a first positioning pin hole 702, and several first screw holes 704. The bottom of the sensor shaft 203 has a protruding positioning stop 202, and the center of the positioning stop 202 has a sensor shaft 203 that can rotate relative to the positioning stop 202. The bottom end of the positioning stop 202 is fastened to the stop positioning hole 701. Specifically, the positioning stop 202 is cylindrical, and its outer diameter is either interference-fitted or transition-fitted with the inner diameter of the stop positioning hole 701, thus achieving a fast connection after the positioning stop 202 is inserted into the stop positioning hole 701. The sensor body 201 is provided with a second positioning pin hole 204 that matches the first positioning pin hole 702, and the first positioning pin hole 702 and the second positioning pin hole 204 are connected by a positioning pin. The sensor body 201 also has second screw holes 205 that match the several first screw holes 704.

[0033] During installation, first insert the locating pin 3 into the second locating pin hole 204 of the sensor body 201, then align the second locating pin hole 204 with the first locating pin hole 702. The steering angle sensor 2 and the steering knuckle kingpin 7 can then be installed. Finally, tighten the corresponding second screw hole 205 and first screw hole 704 with bolts. The first locating pin hole 702 and the second locating pin hole 204 improve the ease of installation of the steering angle sensor 2 and the steering knuckle kingpin 7, and ensure the secure installation of the steering angle sensor 2 and the steering knuckle kingpin 7.

[0034] As can be seen, by adding a stop positioning hole and a first positioning pin hole to the steering knuckle kingpin, the operator only needs to align the sensor body with the steering knuckle kingpin and push the positioning stop into the stop positioning hole during the actual installation process to quickly complete the initial positioning, so that the sensor shaft and the steering knuckle kingpin are in a coaxial state. The whole process is simple and easy to operate, solving the problem of inconvenient installation.

[0035] Furthermore, the installation structure is stable, allowing the steering knuckle kingpin 7 to rotate stably with the sensor body 201, while the sensor shaft 203 remains stationary due to its limiting connection with the front axle housing 6. The sensor body 201 and the sensor shaft 203 maintain stable relative rotation, accurately acquiring the front wheel steering angle data. Even under long-term, high-intensity operations (such as tractors facing complex and changing farmland road conditions, frequent turning, bumping and shaking), the steering angle sensor 2 will not loosen or shift, completely overcoming the problem of poor stability.

[0036] like Figure 4 As shown, in this embodiment, the top radial diameter of the steering knuckle kingpin 7 is larger than its bottom diameter, forming a connecting plate 703. The connecting plate 703 has several bolt holes. The upper connecting lug 81 of the front wheel steering knuckle 8 is fixedly connected to the bottom of the connecting plate 703 by bolts, and the upper connecting lug 81 is located between the connecting plate 703 and the front axle housing 6. The bottom of the steering knuckle kingpin 7 is rotatably inserted into the front axle housing 6. Specifically, the bottom of the steering knuckle kingpin 7 is cylindrical, and the outer diameter of the bottom is slightly smaller than the inner diameter of the kingpin insertion hole of the front axle housing 6, thereby realizing that the bottom of the steering knuckle kingpin 7 can be inserted into the kingpin insertion hole of the front axle housing 6 and can rotate within the kingpin insertion hole, completing the rotatable insertion structure of the two. The lower connecting lug 82 of the front wheel steering knuckle 8 is installed at the bottom end of the front axle housing 6 by a limiting bolt. It can be seen that the upper connecting lug 81 and the lower connecting lug 82 are rotatably connected to the top and bottom ends of the front axle housing, respectively.

[0037] By adopting the above technical solution, the upper connecting ear 81 of the front wheel steering knuckle 8 fits against the connecting disc 703 of the steering knuckle kingpin 7. Using bolts passing through the bolt holes on the connecting disc 703, the upper connecting ear 81 of the front wheel steering knuckle 8 and the steering knuckle kingpin 7 can be easily and securely assembled together. The operation is simple, and the bolt connection ensures the reliability of the connection between the front wheel steering knuckle 8 and the steering knuckle kingpin 7. Simultaneously, the bottom of the steering knuckle kingpin 7 is rotatably inserted into the front axle housing 6, allowing the steering knuckle kingpin 7 to rotate smoothly around the front axle housing 6. The entire structure is compact, enhancing the stability of the overall mechanical structure. When the tractor performs a steering operation, the front wheel steering knuckle 8 begins to rotate under force. Because it is rigidly connected to the connecting disc 703 of the steering knuckle kingpin 7 via bolts, it drives the steering knuckle kingpin 7 to rotate synchronously. At this time, the sensor body 201, which is securely connected to the steering knuckle kingpin 7, also rotates accordingly. Meanwhile, the bottom of the sensor shaft 203 remains relatively stationary due to its limiting connection with the front axle housing 6, ultimately achieving smooth relative rotation between the sensor body 201 and the sensor shaft 203.

[0038] In a preferred embodiment, the connecting plate 703 has three bolt holes arranged in a triangular pattern. From a mechanical perspective, the triangular structure provides optimal stability. When the front wheel steering knuckle 8 is fixed to the connecting plate 703 with bolts, the three bolts distribute the force evenly, more effectively resisting external impacts and vibrations from all directions. In the complex and varied operating scenarios of tractors (such as frequent turning and bumpy swaying on complex and varied farmland roads), this stable connection structure prevents loosening between the front wheel steering knuckle 8 and the steering knuckle kingpin 7, maintaining the tightness and reliability of the connection, thereby ensuring the stable operation of the steering system.

[0039] In a preferred embodiment, the locating hole 701 is located at the central axis of the steering knuckle kingpin 7, laying the structural foundation for the coaxial engagement of the sensor shaft 203 and the steering knuckle kingpin 7. Since the central axis is the axis of rotation of the steering knuckle kingpin 7, setting the locating hole 701 here ensures that the locating stop 202, which is rotatably inserted with it, can be precisely aligned, minimizing radial deviation during assembly. This ensures that the sensor shaft 203 and the steering knuckle kingpin 7 maintain a high degree of coaxiality during rotation, effectively avoiding measurement errors caused by poor coaxiality. In addition, a first locating pin hole 702 and two first screw holes 704 are provided on the side of the locating hole 701. By placing the first locating pin hole 702 on the side of the locating hole 701, when installing the steering angle sensor 2, the operator can use the locating hole 701 at the central axis as the core visual and operational reference point, and naturally align the first locating pin hole 702 on the side with the second locating pin hole 204 on the sensor body 201, making the operation more intuitive and convenient. The adjacent layout greatly reduces the time spent finding and aligning the pin holes during installation, thus improving installation efficiency.

[0040] Based on this preferred implementation, further optimization is made. Specifically, one of the first screw holes 704 is located on one side of the stop positioning hole 701, and the other first screw hole 704 and the first positioning pin hole 702 are located on the other side of the stop positioning hole 701. The two first screw holes 704 are symmetrically distributed, providing more accurate and multi-dimensional angle positioning for the steering angle sensor 2. When the sensor body 201 is installed on the steering knuckle kingpin 7, one positioning pin hole and two screw holes act like three precise "anchor points" to constrain the sensor from different directions.

[0041] like Figure 1 and Figure 5 As shown, the bottom of the sensor shaft 203 is connected to an extension shaft 5 via a coupling 4. The coupling 4 can compensate for misalignment between the extension shaft 5 and the sensor shaft 203, ensuring that the central axis of the sensor shaft 203 is aligned with the central axis of the extension shaft 5. This alignment ensures efficient and stable power transmission, eliminating additional friction, jamming, or energy loss caused by shaft misalignment. The bottom of the extension shaft 5 is inserted into the front axle housing 6 and is fixedly connected to it. In a preferred embodiment, the bottom of the extension shaft 5 is provided with a D-head 501, and the front axle housing 6 is provided with a D-hole adapted to the D-head 501. The extension shaft 5 is inserted into the D-hole of the front axle housing 6 through the D-head 501. The D-type head 501 and the D-type hole are matched in shape to achieve precise angle positioning and circumferential limiting, ensuring that the extension shaft 5 can be quickly aligned with the predetermined angle each time it is installed. After the D-type head 501 is inserted into the D-type hole, due to its unique non-circular contour, a tight mechanical lock is formed, which can resist external force pulling and vibration interference from all directions, prevent the extension shaft 5 from loosening or shifting, and ensure that the transmission link of sensor shaft 203-extension shaft 5-front axle housing 6 remains stable at all times.

[0042] like Figure 1 As shown, in a preferred embodiment, a protective cover 1 is installed on the connecting disc 703 of the steering knuckle kingpin 7, and the protective cover 1 covers the top of the steering angle sensor 2. Specifically, the connecting disc 703 is symmetrically provided with two third screw holes 7031, and the protective cover 1 is installed and fixed to the third screw holes 7031 by bolts. The agricultural production environment is complex and changeable, filled with dust, soil, sand particles, and foreign objects such as crop residues. During tractor operation, impurities are easily splashed everywhere. The protective cover 1 is tightly fastened to the top of the sensor, which can effectively prevent various foreign objects from entering the precision components inside the sensor, and avoid the sensor's sensing accuracy from decreasing or functional failure due to dust accumulation, foreign object jamming, etc. It can be seen that the protective cover 1 is used to protect the steering angle sensor 2 from damage.

[0043] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A tractor front axle steering angle sensor mounting structure for mounting a steering angle sensor at a front axle housing and front wheel knuckle connection of a tractor to measure front wheel steering, characterized by, It also includes a steering knuckle kingpin, which has a stop positioning hole, a first positioning pin hole and a plurality of first screw holes; The bottom of the steering angle sensor is provided with a protruding positioning stop, the center of the positioning stop is provided with a sensor shaft that can rotate relative to the positioning stop, and the side of the positioning stop is provided with a second positioning pin hole and several second screw holes. The positioning stop is inserted into the positioning hole of the stop, the second positioning pin hole is connected to the first positioning pin hole through the positioning pin, and the plurality of second screw holes are connected to the corresponding plurality of first screw holes through bolts. The kingpin of the steering knuckle is connected to the front wheel steering knuckle, and the bottom of the sensor shaft passes through the stop positioning hole and is limited and connected to the front axle housing.

2. The tractor front axle steering angle sensor mounting structure according to claim 1, characterized by The top of the steering knuckle kingpin is radially larger than its bottom and forms a connecting plate. The connecting plate has several bolt holes. The upper connecting lug of the front wheel steering knuckle is bolted to the bottom of the connecting plate. The bottom of the steering knuckle kingpin is rotatably inserted into the front axle housing, and the upper connecting lug is located between the connecting plate and the front axle housing.

3. The mounting structure for a tractor front axle steering angle sensor according to claim 2, characterized in that, The connecting plate has three bolt holes, which are arranged in a triangular pattern.

4. The tractor front axle steering angle sensor mounting structure according to claim 1, characterized by The stop positioning hole is located at the central axis of the steering knuckle kingpin, and a first positioning pin hole and two first screw holes are provided on the side of the stop positioning hole.

5. The tractor front axle steering angle sensor mounting structure according to claim 4, characterized by One of the first screw holes is located on one side of the stop positioning hole, and the other first screw hole and the first positioning pin hole are located on the other side of the stop positioning hole, and the two first screw holes are symmetrically distributed.

6. The tractor front axle steering angle sensor mounting structure according to claim 1, characterized by The bottom of the sensor shaft is connected to an extension shaft via a coupling, and the central axis of the sensor shaft is aligned with the central axis of the extension shaft.

7. The tractor front axle steering angle sensor mounting structure according to claim 6, characterized by The bottom of the extension shaft is inserted into the front axle housing and is limitedly connected to the front axle housing.

8. The tractor front axle steering angle sensor mounting structure according to claim 1, characterized by A protective cover is installed on the connecting plate of the steering knuckle kingpin, and the protective cover is placed on top of the steering angle sensor.

9. The tractor front axle steering angle sensor mounting structure according to claim 8, characterized by The connecting plate is symmetrically provided with two third screw holes, and the protective cover is installed and fixed to the third screw holes by bolts.

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