Unmanned aerial vehicle large-size box floating weighing structure

Abstract

This utility model discloses a floating weighing structure for a large-size unmanned aerial vehicle (UAV) housing. Besides the housing and landing gear, it also includes: a support structure with fixed and floating supports mounted on the landing gear; a weighing mechanism with two sets of weighing mechanisms installed at the bottom of the housing, one set rotatably connected to the fixed supports, and the other set floating with the housing and movablely separated from the movable supports; and an elastic abutment structure located at the bottom of the housing. This utility model firstly, by setting up floating supports and an elastic abutment structure, allows the housing to have a certain degree of freedom of movement during weighing, effectively releasing lateral stress caused by housing deformation during manufacturing or use, thereby improving the accuracy of weighing data; secondly, the rotatable connection and movable separation design better adapts to the displacement and deformation of the large-size housing during dynamic operation, reducing assembly and debugging difficulty and improving the stability and reliability of the system.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) technology, and in particular to a floating weighing structure for a large-size UAV housing. Background Technology

[0002] Agricultural drones, also known as agricultural plant protection unmanned aerial vehicles, are unmanned aerial vehicles specifically designed for agricultural plant protection operations. In current technology, agricultural drones are typically equipped with containers for storing and transporting liquid or granular materials such as pesticides and fertilizers.

[0003] With the increasing payload capacity of agricultural drones, the use of large-sized containers (such as medicine tanks) is becoming more and more widespread. However, large-sized containers are prone to deformation during manufacturing and use. This deformation introduces lateral stress, which interferes with the measurement of the weighing sensor, leading to inaccurate weighing data and consequently affecting the operational accuracy of the drone.

[0004] Existing weighing layout schemes are mostly fixed (three-point or four-point fixed), suitable for small and medium-sized boxes. However, for large boxes, the fixed layout cannot effectively compensate for the errors caused by deformation, making assembly and debugging difficult and compromising weighing accuracy.

[0005] To address the aforementioned shortcomings, a large-size box-shaped floating weighing structure for unmanned aerial vehicles (UAVs) is provided. Utility Model Content

[0006] The purpose of this utility model is to provide a floating weighing structure for a large-size box of a drone in order to solve the above-mentioned problems.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a large-size box-shaped floating weighing structure for unmanned aerial vehicles, comprising a box and landing gear, and further comprising:

[0008] Support structure: The legs are equipped with fixed support components and floating support components, which support the weight of the box.

[0009] Weighing mechanism: Two sets of weighing mechanisms are installed at the bottom of the box. One set of weighing mechanisms is rotatably connected to the fixed support, and the other set of weighing mechanisms can float with the box and move apart from the floating support.

[0010] Elastic abutment structure: Located at the bottom of the box, in conjunction with floating support components, it balances the weight of the box on the two sets of weighing mechanisms.

[0011] Preferably, the fixed support and the floating support are in the form of a clamp structure, and the fixed support and the floating support are clamped onto the frame by bolts.

[0012] Preferably, the weighing mechanism includes an upper box, a lower box, and a weighing sensor. The weighing sensor is sandwiched between the upper box and the lower box and is fixed to the box by screws passing through the upper box and the lower box. A bearing seat is fixed on the weighing sensor.

[0013] Preferably, the elastic abutment structure includes a movable seat and a universal ball bearing, the universal ball bearing is installed in a bearing housing, and the movable seat is rotatably connected to the bearing housing by a pin passing through the universal ball bearing.

[0014] Preferably, a retaining ring is provided in the groove of the bearing housing inner hole to axially limit the universal ball bearing.

[0015] Preferably, a buffer pad is installed at the bottom of the movable seat, a flange is formed on the buffer pad, and a groove is formed at the bottom of the movable seat. When the buffer pad is pressed into the bottom of the movable seat, the flange undergoes elastic deformation and gets into the groove.

[0016] Preferably, the fixed support is rotatably connected to the bearing seat via a second pin.

[0017] Preferably, both pin one and pin two are provided with retaining rings at their ends, which axially limit pin one and pin two.

[0018] Preferably, both the fixed support and the floating support have wire connectors fixed to their sides by snap-fit, and a connecting wire connects the wire connectors to the load cell.

[0019] Preferably, the top of the housing has a protrusion, and there is a gap between the protrusion and the legs to limit the floating range of the housing.

[0020] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0021] 1. This application, by setting up floating support components and elastic abutment structure, enables the box to have a certain degree of floating freedom during the weighing process, which can effectively release the lateral stress caused by the deformation of the box during manufacturing or use, avoid interference with the weighing sensor, and thus significantly improve the accuracy of the weighing data.

[0022] 2. This application, through its rotating connection and movable separation design, can better adapt to the displacement and deformation of large-sized boxes during dynamic operations, reduce the difficulty of assembly and debugging, and improve the stability and reliability of the system. Attached Figure Description

[0023] Figure 1 A three-dimensional structural schematic diagram of the hopper assembly provided according to an embodiment of the present utility model is shown;

[0024] Figure 2A cross-sectional structural schematic diagram of the tripod provided according to an embodiment of the present utility model is shown;

[0025] Figure 3 A schematic diagram of the cooperative structure between the floating support and the movable seat according to an embodiment of the present invention is shown;

[0026] Figure 4 A schematic diagram of the mating structure between the fixed support member and the bearing seat according to an embodiment of the present utility model is shown;

[0027] Figure 5 A cross-sectional schematic diagram of a movable seat provided according to an embodiment of the present invention is shown;

[0028] Figure 6 A cross-sectional schematic diagram of a weighing mechanism provided according to an embodiment of the present invention is shown;

[0029] Figure 7 A schematic diagram showing the stable state of the housing relative to the legs according to an embodiment of the present invention is shown;

[0030] Figure 8 A schematic diagram showing the floating state of the housing relative to the legs according to an embodiment of the present invention is shown.

[0031] Legend:

[0032] 1. Housing; 101. Protrusion; 2. Legs; 3. Weighing mechanism; 4. Bearing housing; 401. Universal ball bearing; 5. Movable seat; 501. Pin one; 502. Buffer pad; 6. Floating support; 7. Connecting wire; 8. Wire connector; 9. Fixed support; 901. Pin two. Detailed Implementation

[0033] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1-8 This utility model provides a technical solution: a large-size box-shaped floating weighing structure for unmanned aerial vehicles (UAVs), including a box 1 and a landing gear 2, and further including:

[0035] Support structure: The legs 2 are equipped with fixed support 9 and floating support 6, which support the weight of the box 1.

[0036] The fixed support 9 is firmly fixed to the drone tripod 2 by a clamp structure, providing a stable support point. The floating support 6 is also fixed to the tripod 2 by a clamp structure, but it is not rigidly connected to the weighing mechanism 3, allowing the weighing mechanism 3 and the floating support 6 to move and separate within a certain range, thereby achieving the floating effect of the box 1.

[0037] Weighing mechanism 3: Two sets of weighing mechanisms 3 are installed at the bottom of the box 1. One set of weighing mechanisms 3 is rotatably connected to the fixed support 9, and the other set of weighing mechanisms 3 can float with the box 1 and move apart from the floating support 6. When the box 1 is placed on the support structure, the weight of the box 1 is transmitted to the support structure through the weighing sensor. The sensor deforms and outputs an electrical signal to realize weight measurement.

[0038] The fixed support 9 is rotatably connected to the weighing mechanism 3, allowing the weighing mechanism 3 to rotate within a certain range to accommodate the slight displacement of the box 1 in a dynamic environment.

[0039] The two sets of weighing mechanisms 3 work together, with one set rotatably connected to the fixed support 9 to provide a stable measurement reference. The other set of weighing mechanisms 3 works with the floating support 6, allowing the housing 1 to float within a certain range, avoiding measurement errors caused by rigid connections. The two sets of weighing mechanisms 3 are not limited to being arranged left and right relative to the housing 1, but can also be arranged in pairs front and back or in other combinations.

[0040] Elastic abutment structure: Located at the bottom of the housing 1, in conjunction with the floating support 6, it balances the weight of the housing 1 on the two sets of weighing mechanisms 3. The elastic abutment structure allows the housing 1 to adaptively adjust its position in dynamic environments, maintaining uniform force on the two sets of weighing mechanisms 3 and improving measurement accuracy.

[0041] Specifically, such as Figure 3 and Figure 4 As shown, the fixed support 9 and the floating support 6 form a clamp structure. The clamp is tightened by bolts to clamp the fixed support 9 and the floating support 6 onto the leg 2.

[0042] The clamping structure consists of U-shaped metal parts, which are fastened with bolts or screws to firmly clamp the fixed support 9 and the floating support 6 onto the cylindrical crossbar of the leg 2. The clamping structure provides a uniform clamping force, ensuring a tight fit between the support and the leg 2, which helps improve the stability and reliability of the structure and prevents loosening or displacement.

[0043] Specifically, such as Figure 6 As shown, the weighing mechanism 3 includes an upper box, a lower box, and a weighing sensor. The weighing sensor is sandwiched between the upper box and the lower box and is fixed to the housing 1 by screws that pass through the upper box and the lower box. A bearing seat 4 is fixed on the weighing sensor.

[0044] The upper housing is fixed to the box 1 with screws to ensure that the weight of the box 1 can be effectively transferred to the load cell. The lower housing is connected to the upper housing with screws to clamp the load cell in the middle. The bearing seat 4 is fixed to the load cell and is used to connect the support structure.

[0045] Load cells typically employ strain gauge sensors. When subjected to pressure, the resistance of the strain gauge inside the sensor changes. This change in resistance is measured and converted into an electrical signal output. The magnitude of this electrical signal is proportional to the applied pressure (i.e., weight). An external circuit or control system receives the electrical signal, amplifies it, processes it, and calibrates it to obtain accurate weight data.

[0046] Specifically, such as Figures 3-6 As shown, the elastic abutment structure includes a movable seat 5 and a universal ball bearing 401. The universal ball bearing 401 is installed in the bearing housing 4, and the movable seat 5 is rotatably connected to the bearing housing 4 by a pin 501 that passes through the universal ball bearing 401.

[0047] The movable seat 5 cooperates with the floating support 6 to provide support and buffer. It is rotatably connected to the bearing seat 4 through pin 501, allowing rotation and floating within a certain range.

[0048] A retaining ring is provided in the groove of the inner hole of the bearing housing 4. The retaining ring is used to axially limit the universal ball bearing 401. The universal ball bearing 401 is fixedly installed in the bearing housing 4, allowing the movable seat 5 to rotate freely in all directions.

[0049] A buffer pad 502 is installed at the bottom of the movable seat 5. A flange is formed on the buffer pad 502, and a groove is formed at the bottom of the movable seat 5. When the buffer pad 502 is pressed into the bottom of the movable seat 5, the flange undergoes elastic deformation and engages with the groove. The buffer pad 502, installed at the bottom of the movable seat 5, has elastic deformation capability. Through the cooperation of the flange and the groove, a secure connection is achieved between the buffer pad 502 and the movable seat 5.

[0050] The fixed support 9 is rotatably connected to the bearing seat 4 via pin 2 901. Both pin 1 501 and pin 2 901 are provided with retaining rings at their ends, which axially limit pin 1 501 and pin 2 901.

[0051] Pin 501 and pin 901 are used to connect the movable seat 5 to the bearing seat 4 and the bearing seat 4 to the fixed support 9, respectively. A retaining ring is provided at the end to achieve axial limiting and prevent the pins from falling out.

[0052] Specifically, such as Figure 3 and Figure 4 As shown, both the fixed support 9 and the floating support 6 have wire connectors 8 fixed to their sides by snap-fit, and the wire connectors 8 are connected to the load cell by connecting wires 7.

[0053] The wire connector 8 is fixed to the side of the fixed support 9 and the floating support 6 by a snap-fit, and is used to realize the electrical connection between the load cell and the external circuit. The connecting wire 7 is connected between the wire connector 8 and the load cell, and is used to transmit the electrical signal output by the load cell.

[0054] Specifically, such as Figure 7 and Figure 8 As shown, a protrusion 101 is formed on the top of the box 1, and a gap exists between the protrusion 101 and the legs 2, allowing the box 1 to float within a certain range. The shape and size of the protrusion 101 are designed according to actual needs, and are usually elongated, cylindrical, or other suitable shapes. The gap between the protrusion 101 and the legs 2 provides space for the box 1 to float. When the box 1 is subjected to external force, the box 1 can move or float freely within the gap range, which acts as a limit to prevent the box 1 from excessive displacement or detaching from the supporting structure. This limiting effect helps maintain the stability of the box 1 during the weighing process.

[0055] The above description of the embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large-size box-shaped floating weighing structure for unmanned aerial vehicles (UAVs), comprising a box (1) and a landing gear (2), characterized in that, Also includes: Support structure: The legs (2) are equipped with fixed support (9) and floating support (6), which support the weight of the box (1). Weighing mechanism (3): Two sets of weighing mechanisms (3) are installed at the bottom of the box (1). One set of the weighing mechanism (3) is rotatably connected to the fixed support (9), and the other set of the weighing mechanism (3) can float with the box (1) and move apart from the floating support (6). Elastic abutment structure: set at the bottom of the box (1), in conjunction with floating support (6), to balance the weight of the box (1) on the two sets of weighing mechanisms (3).

2. The floating weighing structure for a large-size box-shaped UAV according to claim 1, characterized in that, The weighing mechanism (3) includes an upper box, a lower box and a weighing sensor. The weighing sensor is sandwiched between the upper box and the lower box and is fixed to the box body (1) by screws that pass through the upper box and the lower box. A bearing seat (4) is fixed on the weighing sensor.

3. The floating weighing structure for a large-size box-shaped UAV according to claim 2, characterized in that, The elastic abutment structure includes a movable seat (5) and a universal ball bearing (401). The universal ball bearing (401) is installed in the bearing housing (4). The movable seat (5) is rotatably connected to the bearing housing (4) by a pin (501) that passes through the universal ball bearing (401).

4. The floating weighing structure for a large-size box-shaped UAV according to claim 2, characterized in that, The fixed support (9) is rotatably connected to the bearing seat (4) by pin 2 (901).

5. The floating weighing structure for a large-size box-shaped UAV according to claim 3, characterized in that, A buffer pad (502) is installed at the bottom of the movable seat (5). A flange is formed on the buffer pad (502), and a groove is formed at the bottom of the movable seat (5). When the buffer pad (502) is pressed into the bottom of the movable seat (5), the flange undergoes elastic deformation and gets stuck in the groove.

6. The floating weighing structure for a large-size box-shaped UAV according to claim 3, characterized in that, A retaining ring is provided in the groove of the inner hole of the bearing housing (4) to axially limit the universal ball bearing (401).

7. The floating weighing structure for a large-size box-shaped UAV according to claim 1, characterized in that, The fixed support (9) and the floating support (6) are in the form of a clamp structure. The clamp is tightened by bolts to clamp the fixed support (9) and the floating support (6) onto the leg (2).

8. The floating weighing structure for a large-size box-shaped UAV according to claim 1, characterized in that, Both the fixed support (9) and the floating support (6) have wire connectors (8) fixed to their sides by snaps, and the wire connectors (8) are connected to the weighing sensor by connecting wires (7).

9. A large-size box-shaped floating weighing structure for unmanned aerial vehicles according to claim 1, characterized in that, The top of the box (1) has a protrusion (101) and there is a gap between the protrusion (101) and the legs (2) to limit the floating range of the box (1).

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