Automatic leveling device for loading machine

Abstract

The utility model discloses an automatic leveling device used on a loader. The automatic leveling device comprises an angle sensor, a shifting piece, a shifting rod and a protective cover. The angle sensor is composed of a rotating shaft and a body, the body is fixed in a protective cover, and the protective cover is connected with the front frame. One end of the plectrum is fixedly connected with the sensor rotating shaft through a through hole, and the other end of the plectrum is provided with an empty slot; the shifting rod is fixed on the movable arm, and the bolt is movably connected with the shifting piece empty groove. During working, the movable arm moves to drive the shifting rod to swing, the shifting piece is driven to rotate through cooperation of the plug pin and the empty groove, then the sensor rotating shaft rotates, and mechanical displacement is converted into an electric signal. The control system adjusts the angle of the bucket in real time according to sensor signals, and the automatic leveling function is achieved.

Description

Technical Field

[0001] This utility model relates to the field of loader technology, and in particular to an automatic leveling device used on loaders. Background Technology

[0002] During loader operation, leveling the bucket is a crucial step in material loading, unloading, and transfer. Traditionally, leveling the loader bucket relies primarily on the operator's experience and judgment, involving manually adjusting the hydraulic valves or levers by observing the bucket's relative position to the ground.

[0003] However, due to differences in operators' skill levels and visual judgment, it is difficult to ensure that the bucket is leveled consistently for each operation, which can easily lead to material spillage or bucket tilting, affecting loading and unloading efficiency and work quality. Furthermore, operators need to repeatedly adjust the bucket's position, which can easily lead to fatigue and reduced work efficiency over long periods, and may also cause safety hazards due to misoperation.

[0004] Currently, some loaders on the market are equipped with mechanical or sensor-assisted leveling devices, such as semi-automatic leveling via tilt sensors and hydraulic control systems. However, these devices still have some problems. For example, mechanical structures are susceptible to vibration and wear; frequent replacements not only significantly increase operating costs, but long-term wear can also lead to accumulated detection errors, thus reducing reliability. Furthermore, existing sensor solutions are easily interfered with under complex working conditions, making it difficult to consistently and stably output accurate signals. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model proposes an automatic leveling device for use on a loader, the automatic leveling device comprising: an angle sensor, a lever, a lever, and a protective cover;

[0006] The angle sensor includes an angle sensor rotating shaft and an angle sensor body. The angle sensor body is fixedly mounted on the protective cover, and the protective cover is fixedly connected to the front frame.

[0007] The lever has a plate-like structure. One end of the lever has a circular through hole at its center that matches the shape of the rotation shaft of the angle sensor, and the other end has a slot.

[0008] One end of the lever is fixedly installed on the boom, and the other end is provided with a pin, which is movably connected to the slot.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This invention uses an angle sensor to monitor the boom angle in real time. Combined with the mechanical linkage structure of the lever and the shift lever, it converts physical displacement into precise electrical signals, achieving automatic feedback and adjustment of the bucket angle. Simultaneously, the automated operation reduces the operator's workload, eliminating the need for continuous manual fine-tuning. It is particularly suitable for long-duration, high-intensity work scenarios, effectively improving the overall working efficiency of the loader.

[0011] This invention features an angle sensor that works in conjunction with a mechanical triggering structure. The sensor portion is fixed inside a protective cover, protecting it from external environmental factors such as dust and rain. The movable connection design between the lever and the lever, achieved through the cooperation of a pin and a slot, ensures flexibility while avoiding the wear risks associated with rigid connections. The protective cover further protects critical mechanical components and extends the device's service life. Attached Figure Description

[0012] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0013] Figure 1 This is a connection diagram of the automatic leveling device used on a loader as described in Embodiment 1;

[0014] Figure 2 This is a front view of the automatic leveling device used on a loader as described in Embodiment 1;

[0015] Figure 3 This is the front view of the paddle described in Embodiment 1;

[0016] Figure 4 This is the front view of the lever described in Embodiment 1;

[0017] Figure 5 This is a side view of the lever described in Embodiment 1;

[0018] Figure 6 This is a front view of the protective cover described in Embodiment 1;

[0019] Figure 7 This is a side view of the protective cover described in Embodiment 1;

[0020] Figure 8 This is a structural connection diagram of the automatic leveling device used on a loader as described in Embodiment 1;

[0021] In the diagram: 1. Boom, 2. Lever, 3. Paddle, 4. Angle sensor, 5. Front frame, 6. Protective cover, 7. Pin, 8. Slot, 9. Through hole, 10. Angle sensor rotating shaft, 11. Angle sensor body, 12. Bolt hole. Detailed Implementation

[0022] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. The terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] The embodiments of this application are for achieving the above objectives, such as... Figure 1 As shown, this utility model provides an automatic leveling device for use on a loader. The automatic leveling device includes: an angle sensor 4, a lever 2, a lever 3, and a protective cover 6.

[0025] Angle sensor 4 includes angle sensor rotating shaft 10 and angle sensor body 11. Angle sensor body 11 is fixedly mounted on protective cover 6, and protective cover 6 is fixedly connected to front frame 5.

[0026] like Figure 3 As shown, the lever 2 has a plate-like structure. One end of the lever 2 has a through hole 9 at the center that matches the shape of the angle sensor rotation shaft 10, and the other end has a slot 8.

[0027] Optionally, the inner wall of the through hole 9 is provided with at least two symmetrically distributed planar portions. The planar portions are provided with micro-protrusion textures between them and the contact surface of the rotating shaft, forming a surface contact fit with the corresponding plane machined on the surface of the angle sensor rotating shaft 10, thereby eliminating circumferential rotation gaps.

[0028] The inner diameter of the through hole 9 and the outer diameter of the angle sensor rotating shaft 10 are interference-fitted. During installation, the lever 3 can be fixed on the rotating shaft with slight pressure to ensure that there is no relative rotation between the lever 3 and the angle sensor rotating shaft 10, so as to accurately transmit the rotation angle.

[0029] Optionally, the end of the paddle 3 with the through hole 9 is designed with an arc to avoid interference or obstruction with surrounding components during rotation, and to ensure the smoothness of the paddle 3 when rotating with the angle sensor rotation shaft 10 and moving in conjunction with the lever pin.

[0030] Optionally, the slot 8 is an elongated through slot, and the fit clearance between the pin 7 and the inner diameter of the slot 8 only allows the pin 7 to slide freely along the long axis within the slot 8, thus limiting radial wobble.

[0031] like Figure 4 , Figure 5 and Figure 8 As shown, the lever 2 includes a main body and a pin 7. The main body is designed in three sections, including an installation section, a transition section, and a pin section.

[0032] The lever 2 is fixedly installed on the boom 1, and the pin section is provided with a pin 7, which is movably connected to the slot 8.

[0033] The mounting section is used for fixed connection with the boom 1. The mounting section is provided with at least two bolt holes 12 to ensure that the lever is firmly connected to the boom.

[0034] The transition section is located between the mounting section and the pin section, and is designed to provide a smooth transition from the mounting section to the pin section. The length of the transition section can be adaptively designed according to the relative position of the boom and the paddle.

[0035] The pin section is equipped with a pin 7, which has a cylindrical structure and its outer surface is finely machined to ensure smoothness when it mates with the slot 8 of the lever. The diameter of the pin 7 is smaller than the inner diameter of the slot 8, allowing it to slide freely only along the long axis of the slot 8, limiting radial wobble, and ensuring stable connection and precise movement.

[0036] The design of the engagement between pin 7 and slot 8 ensures that they remain reliably in contact throughout the full stroke of boom 1. Pin 7 has a cylindrical structure with its outer surface precision-machined to form a precise fit with the inner wall of slot 8. The long axis dimension of slot 8 is rationally designed to provide sufficient sliding travel space for pin 7, while retaining appropriate margins at both ends to ensure that pin 7 will not slip out of slot 8 even when boom 1 reaches its maximum lifting or lowering position.

[0037] Optionally, an anti-detachment boss is provided at the end of the pin 7. The boss and the end face of the slot 8 form a mechanical limit to prevent accidental detachment.

[0038] like Figure 6 and Figure 7 As shown, the protective cover 6 has a U-shaped box structure with mounting ears at both ends. Each mounting ear has at least two bolt holes for fixing the protective cover.

[0039] A bolt hole is pre-drilled at the center of the lowest point of the U-shaped structure of the protective cover for fixing and installing the angle sensor.

[0040] Optionally, the mounting ears are rectangular flat plates, slightly narrower than the side wall of the protective cover, and the mounting ears at both ends of the protective cover 6 are centrally symmetrical with reference to the longitudinal center line of the protective cover.

[0041] The top of the protective cover 6 is designed with sufficient space to accommodate the boom at its maximum lifting position, ensuring that the boom will not come into contact with the protective cover during lifting. A safe clearance is maintained between the upper edge of the mounting ears and the movement trajectory of the boom in its lifting position.

[0042] The bottom profile of the protective cover 6 avoids the hinge structure between the front frame and the boom, preventing interference with the protective cover during boom movement. The lower edge of the mounting lug also maintains an appropriate distance from the hinge, further ensuring the freedom of boom movement and the stability of the protective cover.

[0043] Understandably, the protective cover 6 not only provides a fully enclosed protective space for the angle sensor 4, effectively blocking dust, mud and flying stones generated during operation, but also the open top design ensures the full range of motion freedom of the boom 1, while the bottom contour avoidance design avoids rigid collisions with moving parts and eliminates potential interference risks.

[0044] The principle of this utility model during installation and use is as follows:

[0045] When the loader bucket needs to be leveled, the control system receives the control lever's action command and generates a corresponding control signal. This control signal is sent to the proportional valve in the hydraulic system. The proportional valve adjusts the flow and pressure of the hydraulic oil according to the received control signal, thereby controlling the movement of the bucket cylinder, which in turn controls the movement of the boom 1. When the boom 1 moves, it drives the lever 3 fixed on the boom 1 to swing synchronously. The lever 3 is movably connected to the slot 8 of the lever 2 via a pin 7, thereby transmitting the boom displacement to the lever 2.

[0046] The other end of the lever 2 is fixedly connected to the rotating shaft 10 of the angle sensor through the through hole 9. The rotation of the lever 2 will directly drive the rotating shaft 10 to rotate.

[0047] The rotation of the angle sensor rotating shaft 10 is detected in real time by the angle sensor body 11, thereby converting the mechanical displacement of the boom 1 into an angle sensor electrical signal, which is then transmitted to the control system via a cable.

[0048] The control system receives electrical signals from the angle sensor in real time. Combined with a preset control algorithm, it compares the current boom angle with the preset boom angle under level bucket conditions. When a deviation from the preset value is detected, the control system generates a corresponding control signal and controls the bucket cylinder via a proportional valve, thereby controlling the boom rotation and allowing the bucket to quickly and smoothly return to the set position. The entire process requires no manual intervention, eliminating human error in traditional operations and adapting to complex working conditions such as slope operations.

[0049] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic leveling device for use on a loader, characterized in that, The automatic leveling device includes: an angle sensor, a lever, a lever, and a protective cover; The angle sensor includes an angle sensor rotating shaft and an angle sensor body. The angle sensor body is fixedly mounted on the protective cover, and the protective cover is fixedly connected to the front frame. The lever has a plate-like structure, with a through hole at the center of one end that matches the shape of the rotation shaft of the angle sensor, and a slot at the other end; One end of the lever is fixedly installed on the boom, and the other end is provided with a pin, which is movably connected to the slot.

2. The automatic leveling device for use on a loader as described in claim 1, characterized in that, The inner wall of the through hole is provided with at least two symmetrically distributed planar portions.

3. The automatic leveling device for use on a loader as described in claim 2, characterized in that, A micro-convex texture is provided between the flat part and the contact surface of the rotating shaft.

4. The automatic leveling device for use on a loader as described in claim 1, characterized in that, The end of the lever with the through hole is designed with an arc shape.

5. The automatic leveling device for use on a loader as described in claim 1, characterized in that, The lever includes a main body and a pin. The main body is designed in three sections, including an installation section, a transition section, and a pin section.

6. The automatic leveling device for use on a loader as described in claim 5, characterized in that, The pin has a cylindrical structure, and the diameter of the pin is smaller than the inner diameter of the slot. The pin can slide freely along the long axis within the slot.

7. The automatic leveling device for use on a loader as described in claim 5, characterized in that, The anti-detachment boss provided at the end of the pin forms a mechanical limit with the end face of the slot.

8. The automatic leveling device for use on a loader as described in claim 1, characterized in that, The protective cover has a U-shaped box structure with mounting ears at both ends.

9. An automatic leveling device for use on a loader as described in claim 8, characterized in that, The mounting ear is in the shape of a rectangular flat plate, and its width is slightly narrower than the side wall of the protective cover.

10. An automatic leveling device for use on a loader as described in claim 8, characterized in that, The mounting ears are arranged symmetrically with respect to the longitudinal centerline of the protective cover.

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