Damping device of flight controller IMU (Inertial Measurement Unit)

Abstract

A damping device of a flight controller IMU relates to the technical field of flight controllers and comprises an IMU upper shell and an IMU lower shell, the IMU upper shell is arranged at the upper end of the IMU lower shell and is sleeved with the IMU lower shell, a PCB fixing upper shell and a PCB fixing lower shell are arranged between the IMU upper shell and the IMU lower shell, the PCB fixing upper shell is in contact fit with the top of the PCB fixing lower shell, and the PCB fixing lower shell is sleeved with the PCB fixing upper shell. Upper damping sponges are fixedly arranged at the four corners of the top of the PCB fixing upper shell, lower damping sponges are fixedly arranged at the four corners of the bottom of the PCB fixing lower shell, and the upper damping sponges and the lower damping sponges are in contact fit with the inner walls of the IMU upper shell and the IMU lower shell respectively. According to the IMU damping assembly, the IMU upper shell, the IMU lower shell, the PCB fixing upper shell, the PCB fixing lower shell, the upper damping sponge and the lower damping sponge are arranged, the overall size of the IMU damping assembly is reduced, meanwhile, all-directional damping protection can be conducted on the IMU assembly, and the stability of an aircraft during use is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of flight controller technology, specifically to a shock absorption device for a flight controller IMU. Background Technology

[0002] The IMU (Inertial Measurement Unit) in the flight controller is a key component for achieving stable flight and navigation of UAVs. Generally, the IMU is contained within the flight controller. Currently, most UAVs use hard-connected IMUs. During flight, the propellers, motors, and aircraft structure will generate vibrations that will interfere with the raw data of the IMU, resulting in inaccurate attitude estimation of the UAV and thus affecting the stability of the UAV.

[0003] Common drone IMU vibration reduction methods use external vibration damping, which integrates the flight controller with vibration damping. A vibration damping platform is placed below the flight controller, and the flight controller acts as a counterweight for the vibration damping platform and is then fixed to the drone. Small external vibration dampers can only deal with vertical vibrations, while large external vibration dampers can achieve both horizontal and vertical vibration damping, but they occupy a lot of space in the drone's equipment compartment and are expensive. At the same time, existing IMU vibration damping devices usually use a combination of vibration damping balls and counterweights. Although this has improved vibration damping, the structure is complex, the size is large, and the counterweights are heavy. Utility Model Content

[0004] In view of the problems existing in the vibration reduction devices of the current flight controller IMU, this utility model is proposed.

[0005] Therefore, the purpose of this utility model is to provide a shock absorption device for a flight controller IMU, which solves the problems that existing shock absorption components for UAV IMUs are large in size, occupy a large amount of internal space of the UAV, and have a relatively complex shock absorption method.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A vibration damping device for a flight controller IMU includes an upper IMU shell and a lower IMU shell. The upper IMU shell is located at the top of the lower IMU shell and is sleeved with it. A PCB-fixed upper shell and a PCB-fixed lower shell are provided between the upper and lower IMU shells. The top of the PCB-fixed upper shell and the PCB-fixed lower shell are in contact with each other. Upper damping foam is fixed at each of the four corners of the top of the PCB-fixed upper shell, and lower damping foam is fixed at each of the four corners of the bottom of the PCB-fixed lower shell. The upper and lower damping foams are only retained at the four corners. This can reduce horizontal vibrations to the IMU. The upper and lower damping foams are in contact with the inner walls of the upper and lower IMU shells, respectively. After the upper and lower IMU shells are fixed, they will compress the foams to a certain extent. This compression acts as a partial counterweight and also reduces vertical vibrations.

[0008] Preferably, the lower end of the outer wall of the PCB fixing upper shell is provided with multiple grooves, the lower end of the inner wall of the grooves is fixed with a positioning block, and the top of the PCB fixing lower shell is fixed with multiple positioning slots, and the positioning block is inserted into the positioning slot.

[0009] Preferably, the internal threads of the positioning block are fitted with connecting bolts, and the threaded end of the connecting bolts is inserted into the positioning groove.

[0010] Preferably, the lower end of the outer wall of the upper shell of the IMU has two symmetrically arranged countersunk holes, and the upper end of the outer wall of the lower shell of the IMU has a threaded connection hole that communicates with the countersunk holes.

[0011] Furthermore, double-sided adhesive is fixedly provided on the opposite side of the upper and lower shock-absorbing sponges, and is bonded to the upper and lower shells of the IMU by the double-sided adhesive.

[0012] Preferably, both the upper and lower shock-absorbing sponges are EPDM rubber foam sponges. EPDM rubber foam sponges are more elastic than ordinary sponges, offering more elasticity options. By replacing sponges with different strengths and thicknesses, they can be adapted to different aircraft models. Through actual flight tests on different aircraft models, excellent results can be obtained.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] 1. This utility model, by providing an IMU upper shell, an IMU lower shell, a PCB fixed upper shell, a PCB fixed lower shell, an upper shock-absorbing sponge, and a lower shock-absorbing sponge, reduces the overall volume of the IMU shock-absorbing assembly, while providing all-round and effective shock-absorbing protection for the IMU assembly, ensuring the stability of the aircraft during use.

[0015] 2. This utility model, through the PCB fixing upper shell, PCB fixing lower shell, groove, positioning block, positioning slot and connecting bolt, can effectively fix the PCB assembly, and at the same time can provide effective external protection and shock absorption protection for the PCB assembly. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged schematic diagram of part A.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. IMU upper shell; 2. IMU lower shell; 3. PCB fixed upper shell; 4. PCB fixed lower shell; 5. Upper shock-absorbing foam; 6. Lower shock-absorbing foam; 7. Groove; 8. Positioning block; 9. Positioning slot; 10. Connecting bolt; 11. Countersunk hole; 12. Threaded connection hole; 13. Double-sided adhesive. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model discloses a shock absorption device for a flight controller IMU.

[0024] This utility model provides, for example Figure 1-3The shock absorption device of the flight controller IMU shown includes an upper IMU shell 1 and a lower IMU shell 2. The upper IMU shell 1 is located at the upper end of the lower IMU shell 2 and is sleeved with the lower IMU shell 2. The lower end of the outer wall of the upper IMU shell 1 has two symmetrically arranged countersunk holes 11. The upper end of the outer wall of the lower IMU shell 2 has a threaded connection hole 12 that communicates with the countersunk holes 11. A PCB fixing upper shell 3 and a PCB fixing lower shell 4 are provided between the upper IMU shell 1 and the lower IMU shell 2. The top contact fits together. Upper shock-absorbing sponges 5 are fixed at the top four corners of the PCB upper shell 3, and lower shock-absorbing sponges 6 are fixed at the bottom four corners of the PCB lower shell 4. Both the upper shock-absorbing sponges 5 and the lower shock-absorbing sponges 6 are EPDM rubber foam sponges. The upper shock-absorbing sponges 5 and the lower shock-absorbing sponges 6 are in contact fit with the inner walls of the IMU upper shell 1 and the IMU lower shell 2, respectively. Double-sided adhesive 13 is fixed on the side of the upper shock-absorbing sponges 5 and the lower shock-absorbing sponges 6 that is away from each other, and they are bonded to the IMU upper shell 1 and the IMU lower shell 2 by the double-sided adhesive 13.

[0025] Before applying vibration damping protection to the IMU, a copper PCB is first used to fix the lower shell 4, and the PCB is placed inside the lower shell. Then, it is connected to the upper shell 3. Multiple upper damping sponges 5 and lower damping sponges 6 are placed on the upper and lower shells 4. Then, the upper shell 1 and lower shell 2 of the IMU are placed on the outside of the upper and lower shells 4. With the double-sided tape 13, the positions of the upper and lower damping sponges 5 and 6 can be fixed. Then, the bolt assembly is completed by inserting the countersunk hole 11 and the threaded connection hole 12. Since the damping sponges are placed at the four corners, they can reduce the horizontal vibration of the IMU. At the same time, the upper shell 1 and lower shell 2 of the IMU will compress the sponges after they are fixed. This compression plays a part of the counterweight role and can also reduce the vertical vibration.

[0026] In order to enable the PCB upper housing 4 and the PCB lower housing 5 to be quickly positioned and assembled, such as Figure 2-3 As shown, the lower end of the outer wall of the PCB fixing upper shell 3 is provided with multiple grooves 7, the lower end of the inner wall of the groove 7 is fixedly provided with positioning blocks 8, the top of the PCB fixing lower shell 4 is fixedly provided with multiple positioning slots 9, the positioning blocks 8 are inserted into the positioning slots 9, and the internal threads of the positioning blocks 8 are provided with connecting bolts 10, and the threaded end of the connecting bolts 10 is inserted into the positioning slots 9.

[0027] When the PCB upper housing 4 and the PCB lower housing 5 are connected, the CB upper housing 4 and the PCB lower housing 5 can be quickly fitted together and formed by the matching of the positioning block 8 and the positioning groove 9. Then, with the setting of the connecting bolt 10, the CB upper housing 4 and the PCB lower housing 5 can be fixed and formed, and the PCB assembly can be effectively fixed.

[0028] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A shock absorption device for a flight controller IMU, comprising an upper IMU housing (1) and a lower IMU housing (2), characterized in that, The upper IMU shell (1) is located at the upper end of the lower IMU shell (2) and is sleeved with the lower IMU shell (2). A PCB fixing upper shell (3) and a PCB fixing lower shell (4) are provided between the upper IMU shell (1) and the lower IMU shell (2). The top of the PCB fixing upper shell (3) is in contact with the top of the PCB fixing lower shell (4). Upper shock-absorbing sponges (5) are fixed at the four corners of the top of the PCB fixing upper shell (3). Lower shock-absorbing sponges (6) are fixed at the four corners of the bottom of the PCB fixing lower shell (4). The upper shock-absorbing sponges (5) and the lower shock-absorbing sponges (6) are in contact with the inner walls of the upper IMU shell (1) and the lower IMU shell (2), respectively.

2. The shock absorption device for the flight controller IMU according to claim 1, characterized in that, The lower end of the outer wall of the PCB fixing upper shell (3) is provided with multiple grooves (7), and the lower end of the inner wall of the groove (7) is fixedly provided with a positioning block (8). The top of the PCB fixing lower shell (4) is fixedly provided with multiple positioning slots (9), and the positioning block (8) is inserted into the positioning slot (9).

3. The shock absorption device for the flight controller IMU according to claim 2, characterized in that, The internal thread of the positioning block (8) is provided with a connecting bolt (10), and the threaded end of the connecting bolt (10) is inserted into the positioning groove (9).

4. The shock absorption device for the flight controller IMU according to claim 1, characterized in that, The lower end of the outer wall of the upper shell (1) of the IMU has two symmetrically arranged countersunk holes (11), and the upper end of the outer wall of the lower shell (2) of the IMU has a threaded connection hole (12) that communicates with the countersunk holes (11).

5. The shock absorption device for the flight controller IMU according to claim 1, characterized in that, The upper shock-absorbing sponge (5) and the lower shock-absorbing sponge (6) are both fixed with double-sided adhesive (13) on the side away from each other, and are bonded to the upper shell (1) and the lower shell (2) of the IMU by the double-sided adhesive (13).

6. The shock absorption device for the flight controller IMU according to claim 1, characterized in that, Both the upper damping sponge (5) and the lower damping sponge (6) are EPDM rubber foam sponges.

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