Generator for unmanned helicopter

Abstract

The utility model relates to the technical field of generator installation, and discloses a generator for an unmanned helicopter, which comprises a front cover and a connecting structure for fixedly installing the front cover on an installation frame of the unmanned helicopter, the connecting structure comprises a first hanging corner fixedly arranged on the front cover and a bolt with one end penetrating through the first hanging corner to be in threaded connection with the mounting frame, and an anti-loosening structure for limiting reverse rotation of the bolt after the bolt is tightened is arranged between the first hanging corner and the bolt. The groove is formed in the first hanging corner in a concave mode and allows a bolt head of the bolt to be inserted, the locking grooves are formed in the outer ring wall of the bolt head in a concave mode in the circumferential direction at intervals, the locking blocks are arranged on the inner ring wall of the groove in a telescopic mode, and the locking blocks can be inserted into the locking grooves when partially stretching out and are separated from the locking grooves after retracting. The stretching of the locking block is controlled by the push-pull structure, after the generator is fixedly installed, the locking block and the locking groove are connected in an inserted mode to limit reverse rotation of the bolt, and loosening of the bolt is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of generator installation, in particular to a generator for an unmanned helicopter. Background Art

[0002] A generator is fixedly arranged on an unmanned helicopter for power generation. Since the vibration of the generator during power generation is relatively large, the stable installation of the generator is crucial.

[0003] Chinese Patent with application number 201820715771.2 discloses an automotive alternator, which includes an alternator main body, an alternator rear cover, a reinforced front cover, a socket and a terminal. The alternator main body is clamped and fixed by the alternator rear cover and the reinforced front cover. The alternator rear cover and the reinforced front cover are fixedly connected by bolts through corresponding positioning holes. Three hanging feet are provided on the reinforced front cover, and one hanging foot is provided on the alternator rear cover. Mounting holes are provided on the hanging feet a, b and c for mounting bolts to fix.

[0004] When installing the above-mentioned alternator on an unmanned helicopter, the screw of the bolt passes through the mounting hole and is threadedly connected with the thread groove on the mounting bracket fixedly arranged on the unmanned helicopter. After tightening the bolt, the bolt head and the mounting bracket cooperate to clamp the hanging angle (hanging foot) to fixedly install the alternator on the mounting bracket of the unmanned helicopter.

[0005] However, due to the relatively large vibration during the operation of the alternator, and during the continuous vibration process, the bolt is very easy to rotate in the reverse direction, resulting in the loosening or even detachment of the bolt, so that there is a risk of loosening or even falling of the alternator. Content of the Utility Model

[0006] Aiming at the defect that the vibration during the operation of the alternator in the prior art is likely to cause the loosening of the bolt, the utility model provides a generator for an unmanned helicopter.

[0007] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0008] A generator for an unmanned helicopter includes a front cover and a connection structure for fixedly installing the front cover on the mounting bracket of the unmanned helicopter. The connection structure includes a first hanging angle fixedly arranged on the front cover and a bolt whose one end passes through the first hanging angle and is threadedly connected with the mounting bracket. An anti-loosening structure for restricting the reverse rotation of the bolt after the bolt is tightened is arranged between the first hanging angle and the bolt. The anti-loosening structure includes a groove recessed on the first hanging angle for inserting the bolt head, a plurality of locking grooves circumferentially spaced and recessed on the outer circumferential wall of the bolt head, and a locking block telescopically arranged on the inner circumferential wall of the groove. When the locking block partially protrudes, it can be inserted into the locking groove and disengages from the locking groove after retracting. The telescoping of the locking block is controlled by a push-pull structure.

[0009] With the above - mentioned solution, the push - pull structure drives the locking block to retract, ensuring that the screw head can be smoothly inserted into the groove during the tightening process of the bolt. After the bolt is tightened, the screw head of the bolt cooperates with the mounting bracket to clamp and fix the first hanging angle. At this time, the side of the screw head close to the screw rod abuts against the bottom of the groove. If there happens to be a locking groove facing the locking block, the push - pull structure can drive the locking block to partially protrude and insert into the locking groove, restricting the rotation of the screw head relative to the groove, thereby preventing the bolt from rotating in the reverse direction; if there is no locking groove facing the locking block, since several locking grooves are circumferentially arranged, the screw head only needs to rotate a small angle in the tightening direction to rotate the locking groove closest to the locking block to face the locking block, and the locking block partially protrudes and inserts into the locking groove. Moreover, the small angle that the bolt continues to rotate in the tightening direction can also further increase the extrusion between the screw head and the bottom of the groove, thereby further increasing the clamping force on the first hanging angle and enhancing the firmness.

[0010] Preferably, the push - pull structure includes a push - pull rod extending along the direction away from the locking groove on the locking block, with one end located outside the first hanging angle. The first hanging angle is provided with a through - groove for the push - pull rod to pass through and move.

[0011] With the above - mentioned solution, the push - pull rod is located outside the first hanging angle, which is convenient for the operator to grip. Pulling the push - pull rod drives the locking block away from the locking groove until it disengages from the locking groove; pushing the push - pull rod drives the locking block to move closer to the locking groove until it inserts into the locking groove. By judging the length of the push - pull rod outside the first hanging angle, it can be determined whether the locking block is inserted into the locking groove. The through - groove only allows the push - pull rod to pass through, ensuring that the locking block will not detach from the first hanging angle and preventing the loss of the locking block.

[0012] Preferably, a telescopic groove for the locking block to expand and contract is recessed on the inner circumferential wall of the groove. A spring is arranged between the bottom of the telescopic groove and the locking block, which drives the locking block to partially protrude under normal conditions and is fixedly connected to both of them respectively.

[0013] With the above - mentioned solution, the locking block retracts into the telescopic groove and disengages from the locking groove. At this time, the spring is compressed and deformed to generate elastic force. After the external force on the push - pull rod is removed, the restoring elastic force of the spring drives the locking block to automatically protrude and insert into the locking groove. Moreover, since the installation direction of the generator is uncertain and the vibration during operation is large, there is a risk that the locking block slides and disengages from the locking groove. By setting the spring, there is always a thrust force on the locking block, ensuring that when there is no operator pulling the push - pull rod, the locking block is always inserted into the locking groove to restrict the rotation of the bolt.

[0014] Preferably, at least two first hanging angles are circumferentially arranged at intervals around the front cover, and a reinforcing rib with both ends fixedly connected to the adjacent first hanging angles respectively is arranged between the adjacent first hanging angles.

[0015] With the above solution, setting two or more first hanging corners can ensure the stability during the installation of the generator. The more the number of settings, the firmer the fixation. As a fixed point, the first hanging corner bears a relatively large stress and is prone to deformation. In severe cases, it may even break. Setting the reinforcing rib can play a protective role, reduce the deformation of the first hanging corner, and extend the service life of the first hanging corner.

[0016] Preferably, the reinforcing rib is in an arc shape concentric with the front cover.

[0017] With the above solution, the rotor assembly in the generator rotates rapidly, making a large part of the stress direction borne by the first hanging corner distributed along the circumference concentric with the front cover. Therefore, the reinforcing rib is in an arc shape concentric with the front cover, which can minimize the deformation of the first hanging corner to the greatest extent.

[0018] Preferably, the side of the reinforcing rib away from the front cover is flush with the side of the first hanging corner away from the front cover.

[0019] With the above solution, the contact surface between the generator and the mounting bracket is increased, thereby reducing the vibration amplitude of the generator and making the installation more stable.

[0020] Preferably, a rear cover is fixedly connected to the front cover, and a second hanging corner is fixedly arranged on the rear cover.

[0021] With the above solution, the rear cover can also be fixedly connected to the unmanned helicopter through the second hanging corner, increasing the fixed points and balancing the force on the generator, thereby improving the firmness of the generator fixation.

[0022] Since the present utility model adopts the above technical solutions, it has remarkable technical effects: after the bolt is tightened and then rotated a small angle in the tightening direction, the locking groove closest to the locking block can be rotated to face the locking block. The local protrusion of the locking block is inserted into the locking groove to limit the rotation of the bolt, preventing the bolt from loosening. And the small angle of the bolt's continued rotation in the tightening direction can also further increase the extrusion between the bolt head and the bottom of the groove, thereby further increasing the clamping force on the first hanging corner and improving the firmness of the fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic diagram of a generator for an unmanned helicopter in the embodiment Figure 1 ;

[0024] Figure 2 is a schematic diagram of a generator for an unmanned helicopter in the embodiment Figure 2 ;

[0025] Figure 3 is Figure 2 the enlarged view of part A in

[0026] Figure 4 is Figure 2Enlarged view at position B in

[0027] Figure 5 is the top view of a generator for an unmanned helicopter in the embodiment;

[0028] Figure 6 is Figure 5 sectional view taken along line C-C in

[0029] Figure 7 is Figure 6 enlarged view at position D in

[0030] Figure 8 is the partial enlarged view when the locking block and the locking groove are disengaged in a generator for an unmanned helicopter in the embodiment.

[0031] The names of the parts referred to by the numerical labels in the above drawings are as follows: 1. Front cover; 2. First hanging angle; 3. First mounting hole; 4. Bolt; 401. Screw rod; 402. Screw head; 5. Groove; 6. Locking groove; 7. Locking block; 8. Push-pull rod; 9. Through groove; 10. Telescopic groove; 11. Spring; 12. Reinforcing rib; 13. Rear cover; 14. Second hanging angle; 15. Second mounting hole; 16. Grasping block. Detailed implementation manners

[0032] The present utility model will be further described in detail below in conjunction with the drawings and the embodiments.

[0033] Embodiment

[0034] Name, referring to Figures 1 to 8 , including a front cover 1 and a rear cover 13 which are fixedly connected. A first hanging angle 2 is fixedly arranged on the front cover 1, and three first hanging angles 2 are arranged at intervals along the circumferential direction of the front cover 1. A first mounting hole 3 is axially penetrated through the first hanging angle 2 in parallel with the axis of the front cover 1, and only the screw rod 401 of the bolt 4 is allowed to pass through the first mounting hole 3 while the screw head 402 is restricted from passing through. A second hanging angle 14 is fixedly arranged on the rear cover 13, and one second hanging angle 14 is arranged. A second mounting hole 15 is axially penetrated through the second hanging angle 14 in parallel with the axis of the front cover 1, and only the screw rod 401 of the bolt 4 is allowed to pass through the second mounting hole 15 while the screw head 402 is restricted from passing through. After the screw rod 401 passes through the first mounting hole 3 or the second mounting hole 15, it is threadedly connected to a mounting bracket fixedly arranged on the unmanned helicopter. After the bolt 4 is tightened, the screw head 402 of the bolt 4 and the mounting bracket cooperate to clamp the first hanging angle 2 or the second hanging angle 14, and the generator is fixedly installed on the mounting bracket of the unmanned helicopter. A thread groove threadedly connected to the screw rod 401 is arranged on the mounting bracket. The above structure is the prior art and will not be elaborated herein.

[0035] On one side of the first hanging corner 2 close to the front cover 1, a groove 5 is concavely provided. The groove 5 is concentric with the first mounting hole 3 and has a diameter larger than that of the first mounting hole 3. That is, the first mounting hole 3 is located at the bottom of the groove 5, and the cross-sections of the first mounting hole 3 and the groove 5 are stepped. When the bolt 4 is tightened, the screw rod 401 passes through the first mounting hole 3, and the screw head 402 is inserted into the groove 5 and abuts against the bottom of the groove 5.

[0036] On the outer circumferential wall of the screw head 402, a locking groove 6 is concavely provided along its radial direction. A plurality of locking grooves 6 are evenly spaced circumferentially around the screw head 402. On the inner circumferential wall of the groove 5, a telescopic groove 10 is concavely provided along its radial direction. A locking block 7 is telescopically arranged in the telescopic groove 10. When the screw head 402 abuts against the bottom of the groove 5 and rotates to a position where one of the locking grooves 6 is aligned with the telescopic groove 10, a part of the locking block 7 protrudes out and is inserted into the locking groove 6 to restrict the rotation of the bolt 4. When the locking block 7 retracts and disengages from the locking groove 6 and completely retracts into the telescopic groove 10, the limit on the bolt 4 is released. During the process of continuing to rotate the bolt 4 by a small angle after it is tightened, the screw head 402 will still move a very small distance along the axial direction of the groove 5. Therefore, the width of the locking block 7 along the axial direction of the groove 5 is slightly smaller than the width of the locking groove 6 along the axial direction of the groove 5, ensuring that the locking block 7 can be smoothly inserted into the locking groove 6.

[0037] On one side of the locking block 7 close to the bottom of the telescopic groove 10, a push-pull rod 8 is arranged along the telescopic direction of the locking block 7. One end of the push-pull rod 8 away from the locking block 7 is located outside the first hanging corner 2, and a gripping block 16 for facilitating the application of force is fixedly arranged at this end. A through groove 9 is provided on the first hanging corner 2 for the push-pull rod 8 to pass through and move. A spring 11 is arranged between the telescopic groove 10 and the locking block 7 along the telescopic direction of the locking block 7. The two ends of the spring 11 are respectively fixedly connected to the bottom of the telescopic groove 10 and the side of the locking block 7 away from the locking groove 6. When the spring 11 is in its initial state, a part of the locking block 7 protrudes out of the telescopic groove 10.

[0038] Between adjacent first hanging corners 2, a reinforcing rib 12 is provided with both ends fixedly connected to the two of them respectively. The reinforcing rib 12 is in an arc shape concentric with the front cover 1, and the side of the reinforcing rib 12 away from the front cover 1 is flush with the side of the first hanging corner 2 away from the front cover 1.

[0039] When installing the generator, the operator applies force to the gripping block 16 to drive the locking block 7 to retract into the telescopic groove 10. The screw 401 passes through the first mounting hole 3 and is threadedly connected to the threaded groove on the mounting frame of the unmanned helicopter. After tightening the bolt 4, the first hanging angle 2 is fixed on the unmanned helicopter. At this time, the screw head 402 is inserted into the groove 5 and abuts against the bottom of the groove 5. After the operator removes the external force, the locking block 7 moves towards the direction close to the screw head 402 under the drive of the spring 11. If there is a locking groove 6 facing the locking block 7 at this time, a part of the locking block 7 extends out and is inserted into the locking groove 6. If there is no locking groove 6 facing the locking block 7, the bolt 4 is rotated a small angle in the tightening direction to rotate the locking groove 6 closest to the locking block 7 to face the locking block 7, and the locking block 7 automatically extends out partially under the drive of the spring 11 and is inserted into the locking groove 6.

[0040] When disassembling, the operator applies force to the gripping block 16 to drive the locking block 7 to retract into the telescopic groove 10 and disengage from the locking groove 6, that is, the bolt 4 is rotated in the reverse direction to complete the disassembly.

[0041] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A generator for an unmanned helicopter, comprising a front cover (1) and a connection structure for fixing the front cover (1) on a mounting frame of the unmanned helicopter, the connection structure comprising a first hanging angle (2) fixedly arranged on the front cover (1) and a bolt (4) having one end passing through the first hanging angle (2) and then being threadedly connected to the mounting frame, characterized in that: An anti-loosening structure is provided between the first hanging angle (2) and the bolt (4) for limiting the reverse rotation of the bolt (4) after the bolt (4) is tightened. The anti-loosening structure comprises a groove (5) recessed on the first hanging angle (2) for the screw head (402) of the bolt (4) to be inserted, a plurality of locking grooves (6) recessed circumferentially spaced on the outer ring wall of the screw head (402), and a locking block (7) telescopically arranged on the inner ring wall of the groove (5). The locking block (7) can be inserted into the locking groove (6) when partially extended and can be disengaged from the locking groove (6) after retraction. The extension and retraction of the locking block (7) is controlled by a push-pull structure.

2. The generator for an unmanned helicopter according to claim 1, characterized in that: The push-pull structure comprises a push-pull rod (8) extending on a locking block (7) in a direction away from the locking groove (6) and having one end located outside the first hanging angle (2); a through groove (9) is provided on the first hanging angle (2) for the push-pull rod (8) to pass through and move only.

3. The generator for an unmanned helicopter according to claim 2, characterized in that: A telescopic groove (10) for the locking block (7) to be telescopic is concavely provided on the inner ring wall of the groove (5), and a spring (11) is provided between the bottom of the telescopic groove (10) and the locking block (7) and is respectively fixedly connected to the two and drives the locking block (7) to partially extend under normal conditions.

4. The generator for an unmanned helicopter according to claim 1, characterized in that: At least two first hanging corners (2) are arranged at intervals in the circumferential direction of the front cover (1), and reinforcing ribs (12) are arranged between adjacent first hanging corners (2) with their two ends respectively fixedly connected to the two.

5. The generator for an unmanned helicopter according to claim 4, characterized in that: The reinforcing rib (12) is in an arc shape concentric with the front cover (1).

6. The generator for an unmanned helicopter according to claim 4, characterized in that: The side of the reinforcing rib (12) away from the front cover (1) is flush with the side of the first hanging corner (2) away from the front cover (1).

7. The generator for an unmanned helicopter according to claim 1, characterized in that: The front cover (1) is fixedly connected to a rear cover (13), and the rear cover (13) is fixedly provided with a second hanging corner (14).

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