Pin force sensor assembly for identifying loader loading load and loader

Abstract

This utility model discloses a pin shaft force sensor assembly for identifying the load on a loader and a loader itself. The pin shaft force sensor assembly includes a pin shaft force sensor and an anti-rotation lug. The pin shaft force sensor includes a pin shaft, a strain gauge, and a wire. The strain gauge is mounted on the pin shaft, and the wire is connected to the strain gauge and electrically conductive. The anti-rotation lug is fixedly connected to the pin shaft and configured to prevent the pin shaft from rotating around its own axis when the pin shaft force sensor is working. This pin shaft force sensor assembly, by setting the anti-rotation lug, ensures that the pin shaft force sensor is fixedly connected to relevant components during operation, thereby maintaining its preset measurement posture. This structure effectively prevents the pin shaft force sensor from moving or deflecting due to the movement of working parts.

Description

Technical Field

[0001] This utility model belongs to the field of loader technology, specifically relating to a pin shaft force sensor assembly for identifying the load on a loader and a loader. Background Technology

[0002] Loaders, as important earthmoving machinery, are widely used in bulk material loading and transportation operations in mines, ports, construction sites, and other locations. In recent years, to improve operational efficiency, loaders have been developing towards larger and more efficient models, with their working device tonnage and loading capacity continuously increasing. At the same time, the objects that loaders handle are becoming increasingly complex, covering materials with varying densities, viscosities, and particle sizes, such as mineral sands, gravel, coal, and soil.

[0003] Against this backdrop, accurately acquiring the loading load of a loader during actual operation is crucial for optimizing the design of the entire machine and its working devices, fatigue life analysis, operational efficiency assessment, and achieving intelligent energy-saving control and overload protection. However, accurate identification of loading resistance has always been a technical challenge in the industry. The core challenge lies in the fact that loading resistance is not a constant value, but a complex spatiotemporal function that dynamically changes with the loading posture (such as boom lifting angle and bucket retraction angle) and cutting depth. In the complete work cycle from bucket insertion into the stockpile to bucket retraction, the external forces acting on the bucket undergo continuous and drastic changes in magnitude, direction, and point of application. Therefore, there is an urgent need in this field to use pin force sensors to obtain the loading resistance throughout the entire bucket operation process. However, in the operation of pin force sensors, due to the large loading resistance, large machine vibration, and large interaction force between the pin force sensor and the bucket, it is difficult for the pin force sensor to maintain a fixed posture. The pin force sensor changes posture with the bucket movement, which seriously affects the accuracy of the pin force sensor in acquiring the bucket resistance. Utility Model Content

[0004] One of the objectives of this invention is to provide a pin force sensor assembly for identifying loads loaded by a loader. This pin force sensor assembly, by setting anti-rotation lugs, enables the pin force sensor to form a fixed connection with relevant components during operation, thereby maintaining its preset measurement posture. This structure can effectively prevent the pin force sensor from moving or deflecting due to the movement of working parts, fundamentally solving the problem of pin force measurement signal distortion and inaccurate data acquisition caused by changes in the posture of the pin force sensor itself, and ensuring the accuracy and reliability of load identification data.

[0005] To achieve the above objectives, this utility model discloses a pin shaft force sensor assembly for identifying loads shoveled by a loader, comprising a pin shaft force sensor and an anti-rotation lug. The pin shaft force sensor includes a pin shaft, a strain gauge, and a wire. The strain gauge is mounted on the pin shaft, and the wire is connected to the strain gauge and electrically conductive. The anti-rotation lug is fixedly connected to the pin shaft and configured to prevent the pin shaft from rotating around its own axis when the pin shaft force sensor is working.

[0006] As an optional implementation, the pin includes a first support section, a second support section, and a load-bearing section. The load-bearing section includes a first end and a second end. The first support section is fixed to the first end, and the second support section is fixed to the second end.

[0007] As an optional implementation, the strain gauge includes a first-direction strain gauge and a second-direction strain gauge. The first-direction strain gauge is installed at the connection position between the first end and the first support segment, and the second-direction strain gauge is installed at the connection position between the second end and the second support segment. The installation direction of the first-direction strain gauge is perpendicular to the installation direction of the second-direction strain gauge.

[0008] As an optional implementation, the pin force sensor further includes a first mounting groove and a second mounting groove. The first mounting groove is disposed at the connection position between the first end and the first support section, and the second mounting groove is disposed at the connection position between the second end and the second support section. The axes of the first mounting groove and the second mounting groove are perpendicular. The first directional strain gauge is installed in the first mounting groove, and the second directional strain gauge is installed in the second mounting groove.

[0009] As an optional implementation, the first directional strain gauge is fixed to the bottom surface of the first mounting groove, and the second directional strain gauge is fixed to the bottom surface of the second mounting groove.

[0010] As an optional implementation, the conductor includes a first conductor and a second conductor, wherein the first conductor is connected to the first directional strain gauge and the second conductor is connected to the second directional strain gauge.

[0011] As an optional implementation, the pin shaft is provided with at least a first wire passage hole and a second wire passage hole. The first wire passage hole is connected to the first mounting groove and extends out from the end face of the first support section away from the first end. The second wire passage hole is connected to the second mounting groove and extends out from the end face of the first support section away from the first end. The first wire and the second wire are respectively passed through the first wire passage hole and the second wire passage hole.

[0012] As an optional implementation, the first support segment includes a cylindrical segment and a non-cylindrical segment. The cylindrical segment is fixedly connected to the first end, and the anti-rotation ear plate is sleeved on the outside of the non-cylindrical segment and fixedly connected to the non-cylindrical segment.

[0013] As an optional implementation, the non-cylindrical segment includes an arc segment and a straight segment. The two ends of the straight segment are respectively fixed to the two ends of the cylindrical segment. The anti-rotation ear plate is provided with a connecting hole and a mounting hole. The connecting hole is adapted to the non-cylindrical segment and is sleeved on the outside of the non-cylindrical segment.

[0014] A loader includes the aforementioned pin force sensor assembly for identifying the load being shoveled by the loader, and further includes a first working part and a second working part. The first working part is provided with a first hinge hole, and the second working part is provided with a second hinge hole. The first working part and the second working part are hinged through the first hinge hole and the second hinge hole. The first hinge hole and the second hinge hole are coaxially arranged, and the first support section and the second support section of the pin are placed in the second hinge hole. The bearing section of the pin is placed in the first hinge hole and is clearance-fitted with the first hinge hole. The anti-rotation ear plate is fixedly connected to the second working part.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention relates to a pin shaft force sensor assembly for identifying loads on loaders. The assembly includes a pin shaft force sensor and an anti-rotation lug. By using the anti-rotation lug, which is fixedly connected to the pin shaft, the pin shaft force sensor is reliably connected to an external fixing component during operation. This effectively restricts the rotational freedom of the pin shaft around its own axis, ensuring that the internal strain gauge maintains a preset orientation throughout the operation. This structure fundamentally eliminates the technical problem of strain gauge measurement reference deviation and signal output inaccuracy caused by accidental rotation of the pin shaft with the movement of the working device. This significantly improves the accuracy and reliability of the pin shaft force measurement results, providing a stable and reliable data foundation for subsequent precise identification of loading resistance, fatigue analysis of the working device, and intelligent control of the entire machine. Furthermore, the assembly has a simple structure and is easy to implement, effectively improving the overall accuracy of the load identification system without affecting the original structural strength.

[0016] The loader of this utility model includes the aforementioned pin force sensor assembly for identifying the load being shoveled by the loader, thereby enabling the loader to achieve the following technical effects: 1. It enables precise optimization and intelligent control of the overall machine's performance. By providing accurate and continuous dynamic loading resistance data, it offers crucial real-time load information to the loader's power, transmission, and hydraulic systems. Based on this, the overall control system can achieve more precise power matching and intelligent speed regulation, preventing engine overload and stalling or power waste. This significantly improves fuel economy and reduces emissions while ensuring efficient operation.

[0017] 2. It can improve the service life and reliability of key structural components. The real and complete dynamic load spectrum obtained is the only reliable basis for fatigue life analysis and precise design of key structural components such as working devices and frames. Based on this data, structural design can be optimized to avoid over-design or under-design, and precise preventive maintenance strategies can be formulated for users to effectively predict and prevent structural fatigue damage, fundamentally improving the reliability and service life of the entire machine.

[0018] 3. It enables advanced intelligent functions. The reliable load data provided by this component is the core sensing foundation for the loader to achieve intelligence. This allows for the development and implementation of advanced functions such as automatic weighing (real-time display of bucket load during the work cycle), overload protection (automatic alarm or intervention when overload is imminent), and adaptive operating modes (automatic adjustment of entry and lifting strategies based on different material densities), greatly reducing the operator's workload and improving operational safety and efficiency.

[0019] 4. Enhanced operational safety and maintenance convenience: Real-time monitoring of loading resistance provides operators with direct operational feedback, helping them identify hazardous conditions (such as excessive force on one side or sudden encounter with hard obstacles) and make timely adjustments to avoid equipment damage or overturning risks. Simultaneously, continuous load data recording provides robust data support for fault diagnosis and after-sales service, enabling remote fault warnings and precise troubleshooting. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an embodiment diagram of a pin force sensor assembly used for identifying loads on a loader.

[0022] Figure 2 yes Figure 1 Exploded view.

[0023] Figure 3This is a schematic diagram showing the angle and direction of the resultant force.

[0024] Figure 4 Let be the coordinate system relating the resultant force angle to the radial force.

[0025] Explanation of key figure labels: 30. Pin force sensor; 31. Bearing section; 32. First support section; 33. Second support section; 331. Arc section; 332. Straight section; 34. First mounting groove; 35. Second mounting groove; 36. First wire hole; 361. Outer end of the first wire hole; 37. Second wire hole; 371. Outer end of the second wire hole; 39. Pin; 41. Anti-rotation ear plate; 42. Mounting hole; 43. Connecting hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0028] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0029] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0030] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0031] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0032] Please see Figure 1 and Figure 2 As shown in the figure, this application provides a pin force sensor assembly for identifying loads loaded on a loader.

[0033] A pin force sensor assembly for identifying loads loaded on a loader includes a pin force sensor 30 and an anti-rotation ear plate 41. The pin force sensor 30 includes a pin 39, a strain gauge, and a wire. The strain gauge is mounted on the pin 39, and the wire is connected to the strain gauge and electrically conductive. The anti-rotation ear plate 41 is fixedly connected to the pin 39 and is configured to prevent the pin 39 from rotating about its own axis when the pin force sensor 30 is working.

[0034] This pin shaft force sensor 30 operates based on the strain effect of metal and the Wheatstone bridge principle: when the loader is working, the external load is transmitted to the pin shaft 39, causing elastic deformation on its surface, and the strain gauges fixed on the pin shaft 39 change their resistance accordingly; this change is converted into a weak differential voltage signal by the bridge circuit composed of the strain gauges, and is output to an external signal conditioner through wires for amplification and filtering; finally, the data processing unit calculates the precise force value acting on the pin shaft 39 in real time according to the pre-calibrated voltage-force relationship, thereby providing the loader with continuous and accurate loading load data.

[0035] When this pin-shaft force sensor assembly is in operation, it is generally installed on a loader, most commonly at the bucket position. During loader loading and lifting operations, the interaction forces between the various components of the working device (such as the force between the boom and connecting rod) are transmitted to the pin 39 connecting the pin-shaft force sensor 30. As the force-bearing body, the pin 39 experiences radial stress and micro-strain on its surface under these forces. The strain gauge mounted on the pin 39 sensitively detects this micro-strain and immediately converts it into a change in its own resistance value.

[0036] In this embodiment, the pin shaft force sensor assembly, through the anti-rotation lug 41 fixedly connected to the pin shaft 39, reliably connects the pin shaft force sensor 30 to the external fixed component during operation. This effectively constrains the rotational freedom of the pin shaft 39 around its own axis, thereby ensuring that the measurement orientation of its internal strain gauge remains unchanged during operation. This structure fundamentally eliminates the technical problem of strain gauge measurement reference deviation and signal output inaccuracy caused by accidental rotation of the pin shaft 39 with the movement of the working device. This significantly improves the accuracy and reliability of the pin shaft 39 force measurement results, providing a stable and reliable data foundation for subsequent precise identification of loading resistance, fatigue analysis of the working device, and intelligent control of the entire machine based on this data. At the same time, the assembly has a simple structure and is easy to implement, effectively improving the overall accuracy of the load identification system without affecting the original structural strength.

[0037] The pin force sensor assembly in this embodiment is equipped with an anti-rotation ear plate 41, which has a simple structure, low cost, and is easy to install.

[0038] In one embodiment, the pin 39 includes a first support section 32, a second support section 33, and a load-bearing section 31. The load-bearing section 31 includes a first end and a second end. The first support section 32 is fixedly connected to the first end, and the second support section 33 is fixedly connected to the second end. The first support section 32 and the second support section 33 are used for mounting the pin 39 itself, thereby fixing the pin 39. The load-bearing section 31 is installed and in contact with the working component during operation, absorbing the load on the working component.

[0039] In one embodiment, the first support segment 32, the second support segment 33, and the load-bearing segment 31 are integrally formed.

[0040] In one embodiment, the strain gauge includes a first-direction strain gauge and a second-direction strain gauge. The first-direction strain gauge is installed at the connection position between the first end and the first support section 32, and the second-direction strain gauge is installed at the connection position between the second end and the second support section 33. The installation direction of the first-direction strain gauge is perpendicular to the installation direction of the second-direction strain gauge.

[0041] Please see Figure 3 Generally, the first strain gauge is along the X-direction, and the second strain gauge is along the Y-direction. When the load force is applied along the X-direction, the force value counted by the data processing unit based on the deformation of the first strain gauge is the load force acting on the pin 39. When the load force is applied along the Y-direction, the force value counted by the data processing unit based on the deformation of the second strain gauge is the load force acting on the pin 39.

[0042] When the load force is not applied in the X and Y directions, the data processing unit calculates the force on the pin 39 based on the deformation of the first and second strain gauges. However, the force value calculated directly from the deformation of the first and second strain gauges is not an accurate or true load force. This is mainly because the output sensitivity of the first and second strain gauges decreases when the resultant force of the load is not in the X and Y directions. To solve this problem, each pin force sensor 30 must be tested using testing equipment after its fabrication and before being put into use to obtain a coordinate system relating the resultant force angle of the load force to the radial force. Figure 4 As shown, the specific test process is to rotate the pin 39 after determining the direction of the resultant force of the load force so that the direction along the X direction is consistent with the direction of the resultant force, and obtain the radial force at this time. That is, the relationship between the resultant force angle and the radial force is obtained. By testing a sufficient number of angles from 0 to 90°, the coordinate system of the relationship between the resultant force angle and the radial force is finally obtained.

[0043] Of course, according to the above coordinate system, when the load force is in other quadrants, the relationship between its angle and radial force is consistent with the markings shown now. The calibration coefficient test can distinguish between tension and compression in different directions.

[0044] In other words, the testing and data processing principle of this pin-shaft force sensor 30 is as follows: the pin-shaft force sensor 30 can only output strain values ​​in the X and Y directions. Radial forces in the X and Y directions can be obtained through corresponding calibration coefficients. The test data is most accurate when the resultant force is in the X or Y direction. When the resultant force is at other angular positions, the output sensitivity of the strain gauges in the X and Y directions decreases. By using the pin 39 to rotate from X to Y, or through a sufficient number of resultant force angles, more calibration angles can be added to obtain more calibration coefficients. When the load on the bearing section 31 is rotating, the values ​​output by the strain gauges in the X and Y directions can be made closer to the actual load through the calibration coefficients corresponding to the angles.

[0045] In one embodiment, the pin-shaft force sensor 30 further includes a first mounting groove 34 and a second mounting groove 35. The first mounting groove 34 is located at the connection position between the first end and the first support section 32, and the second mounting groove 35 is located at the connection position between the second end and the second support section 33. The axes of the first mounting groove 34 and the second mounting groove 35 are perpendicular. A strain gauge in the first direction is installed in the first mounting groove 34, and a strain gauge in the second direction is installed in the second mounting groove 35. By placing the strain gauges in the recessed mounting grooves, it is effectively ensured that the deformation of the strain gauges is only caused by the deformation of the pin 39, while avoiding the working part pressing on the strain gauges, ensuring the normal operation of the strain gauges, and extending the service life of the strain gauges.

[0046] In one embodiment, a first-direction strain gauge is fixed to the bottom surface of a first mounting groove 34, and a second-direction strain gauge is fixed to the bottom surface of a second mounting groove 35. In another embodiment, the strain gauge is adhesively mounted on the bottom surface of the mounting groove.

[0047] In one embodiment, the conductor includes a first conductor and a second conductor, the first conductor being connected to a strain gauge in a first direction and the second conductor being connected to a strain gauge in a second direction.

[0048] In one embodiment, the pin 39 is provided with at least a first wire-passing hole 36 and a second wire-passing hole 37. The first wire-passing hole 36 is connected to the first mounting groove 34, and its outer end 361 protrudes from the end face of the first support section 32 away from the first end. The second wire-passing hole 37 is connected to the second mounting groove 35, and its outer end 371 protrudes from the end face of the first support section 32 away from the first end. The first wire and the second wire are respectively passed through the first wire-passing hole 36 and the second wire-passing hole 37. The provision of the first wire-passing hole 36 and the second wire-passing hole 37 facilitates wire passing and wiring, and ensures that the wires and strain gauges are not damaged by load forces.

[0049] In one embodiment, the first support section 32 includes a cylindrical section and a non-cylindrical section. The cylindrical section is fixedly connected to the first end, and the anti-rotation lug 41 is sleeved on the outside of the non-cylindrical section and fixedly connected to it. The cylindrical section facilitates the installation and engagement of the pin 39, while the non-cylindrical section facilitates its fixed connection with the anti-rotation lug 41 and ensures relative rotation and deflection between the anti-rotation lug 41 and the pin 39.

[0050] In one embodiment, the non-cylindrical segment includes an arc segment 331 and a straight segment 332. The two ends of the straight segment 332 are respectively fixed to the two ends of the cylindrical segment. The anti-rotation ear plate 41 is provided with a connecting hole 43 and a mounting hole 42. The connecting hole 43 is adapted to the non-cylindrical segment and is sleeved on the outside of the non-cylindrical segment.

[0051] The inner circumference of the connecting hole 43 on the anti-rotation ear plate 41 also includes arc segments and straight segments. When the anti-rotation ear plate 41 is engaged with the non-cylindrical segment, the two arc segments contact and engage with each other, and the two straight segments contact and engage with each other, so that the anti-rotation ear plate 41 engages and is fixedly connected with the first support segment 32.

[0052] In one embodiment, two circular arc segments are welded together, and two straight segments are welded together.

[0053] A loader includes the aforementioned pin force sensor assembly for identifying the load being shoveled by the loader, and further includes a first working part and a second working part. The first working part has a first hinge hole, and the second working part has a second hinge hole. The first and second working parts are hinged together through the first and second hinge holes. The first and second hinge holes are coaxially arranged, and the first support section 32 and the second support section 33 of the pin 39 are placed within the second hinge hole. The bearing section 31 of the pin 39 is placed within the first hinge hole and has a clearance fit with it. An anti-rotation ear plate 41 is fixedly connected to the second working part through a mounting hole 42. When the first working part is working, its load force acts on the bearing section 31, causing the pin 39 to deform, which in turn causes the first strain gauge and the second strain gauge to deform.

[0054] In one embodiment, the first working part is a bucket, and the second working part is a working arm.

[0055] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A pin shaft force sensor assembly for load identification of a loader shovel load, characterized by, The device includes a pin force sensor and an anti-rotation lug. The pin force sensor includes a pin, a strain gauge, and a wire. The strain gauge is mounted on the pin, and the wire is connected to the strain gauge and electrically conductive. The anti-rotation lug is fixedly connected to the pin and configured to prevent the pin from rotating around its own axis when the pin force sensor is working.

2. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 1, characterized in that, The pin includes a first support section, a second support section, and a load-bearing section. The load-bearing section includes a first end and a second end. The first support section is fixed to the first end, and the second support section is fixed to the second end.

3. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 2, characterized in that, The strain gauge includes a first-direction strain gauge and a second-direction strain gauge. The first-direction strain gauge is installed at the connection position between the first end and the first support segment, and the second-direction strain gauge is installed at the connection position between the second end and the second support segment. The installation direction of the first-direction strain gauge is perpendicular to the installation direction of the second-direction strain gauge.

4. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 3, characterized in that, The pin force sensor further includes a first mounting groove and a second mounting groove. The first mounting groove is located at the connection position between the first end and the first support section, and the second mounting groove is located at the connection position between the second end and the second support section. The axes of the first mounting groove and the second mounting groove are perpendicular. The first directional strain gauge is installed in the first mounting groove, and the second directional strain gauge is installed in the second mounting groove.

5. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 4, characterized in that, The first directional strain gauge is fixed to the bottom surface of the first mounting groove, and the second directional strain gauge is fixed to the bottom surface of the second mounting groove.

6. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 4, characterized in that, The conductor includes a first conductor and a second conductor, the first conductor being connected to the first strain gauge in the first direction, and the second conductor being connected to the second strain gauge in the second direction.

7. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 6, characterized in that, The pin shaft is provided with at least a first wire passage hole and a second wire passage hole. The first wire passage hole is connected to the first mounting groove and extends out from the end face of the first support section away from the first end. The second wire passage hole is connected to the second mounting groove and extends out from the end face of the first support section away from the first end. The first wire and the second wire are respectively passed through the first wire passage hole and the second wire passage hole.

8. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 2, characterized in that, The first support section includes a cylindrical section and a non-cylindrical section. The cylindrical section is fixedly connected to the first end, and the anti-rotation ear plate is sleeved on the outside of the non-cylindrical section and fixedly connected to the non-cylindrical section.

9. The pin shaft force sensor assembly for load identification of a loader's scoop load according to claim 8, characterized in that, The non-cylindrical segment includes an arc segment and a straight segment. The two ends of the straight segment are fixedly connected to the two ends of the cylindrical segment, respectively. The anti-rotation ear plate is provided with a connecting hole and a mounting hole. The connecting hole is adapted to the non-cylindrical segment and is sleeved on the outside of the non-cylindrical segment.

10. A loader characterized by Includes the pin force sensor assembly for identifying loads on a loader as described in any one of claims 1 to 9.

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