Gear axial flaring locking structure

Abstract

A gear axial flaring locking structure comprises a locking nut, a gear, bearings, a bearing seat, a lining and a rotor assembly, the rotor assembly comprises a rotor and a shaft rod, the shaft rod is sleeved with the two bearings, the inner ring of the bearing close to one side of the rotor abuts against the rotor, the bearings are installed in installation holes in the two sides of the bearing seat, and the bearing seat is sleeved with the lining. The gear is installed on the side, away from a rotor, of a shaft rod of the rotor assembly, the locking nut is in threaded connection with the shaft rod to lock the gear, a lining is arranged between the two bearings, the two ends of the lining abut against inner rings of the bearings, and the length of the lining is larger than the distance between installation holes in the two sides of the bearing seat. The end face of the gear is provided with an inclined hole, the locking nut is provided with a flaring circle corresponding to the inclined hole in position, after the locking nut is locked, the flaring circle corresponds to the inclined hole in position, and the flaring circle is knocked into the inclined hole to be limited and prevented from loosening by using a tool; and the locking nut is prevented from loosening.

Description

Technical Field

[0001] The utility model relates to the technical field of unmanned aerial vehicle landing gears, in particular to a gear axial expansion and locking structure. Background Art

[0002] The rotor assembly on the drone landing gear system is equipped with a gear on its shaft, which is fixed in place by a locking nut. However, traditional locking nuts have poor locking effects. After the rotor and gear have been working for a long time, the locking nut will become loose, causing the axial position of the gear to change and collide with other transmission gears, and in severe cases, damage the gear. Utility Model Content

[0003] In order to solve the problems mentioned in the above background technology, the utility model provides a gear axial expansion and locking structure.

[0004] The utility model discloses the following technical scheme: a structure for axial expansion and locking of a gear, comprising a locking nut, a gear, a bearing, a bearing seat, a bushing and a rotor assembly, wherein the rotor assembly comprises a rotor and a shaft rod, two bearings are sleeved on the shaft rod, the inner ring of the bearing close to the rotor side abuts against the rotor, the bearings are installed in the mounting holes on both sides of the bearing seat, the gear is installed on the side of the shaft rod of the rotor assembly away from the rotor, the locking nut is threadedly connected to the shaft rod to lock the gear, a bushing is provided between the two bearings, the two ends of the bushing abut against the inner ring of the bearing, the length of the bushing is greater than the distance between the mounting holes on both sides of the bearing seat, so that there is a gap between the inner end faces of the outer rings of the two bearings and the end face of the bearing seat, the end face of the gear is provided with an oblique hole, and the locking nut is provided with an expansion circle corresponding to the position of the oblique hole.

[0005] Furthermore, an adjusting washer is provided between the gear and the bearing, and two ends of the adjusting washer are respectively in contact with the gear and the inner ring of the bearing.

[0006] Furthermore, the gap between the inner end face of the outer ring of the bearing and the end face of the bearing seat is not greater than the clearance of the bearing.

[0007] Furthermore, a key is provided between the gear and the shaft.

[0008] Furthermore, there are eight inclined holes on the gear, which are distributed around the axis of the gear, and there are also eight flaring circles on the locking nut, which are distributed around the axis of the locking nut.

[0009] Beneficial effect: Compared with the prior art, the gear axial flaring and locking structure of the utility model is achieved by arranging an inclined hole on the gear and arranging an flaring circle corresponding to the inclined hole on the locking nut. After the locking nut locks the gear, the flaring circle corresponds to the position of the inclined hole. The flaring circle is knocked into the inclined hole using a tool, which effectively prevents the locking nut from loosening. A sleeve is arranged between the two bearings so that there is a gap between the bearing end face and the bearing seat. The bearing is not subjected to axial force, which can prevent the bearing from getting stuck, ensuring the normal operation of the rotor assembly and the gear, and the locking structure is firm and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of a left side view of the utility model;

[0011] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0012] Figure 3 for Figure 1 A magnified schematic diagram of point A;

[0013] In the figure: 1-locking nut, 2-key, 3-gear, 4-adjusting washer, 5-bearing, 6-bearing seat, 7-bushing, 8-shaft, 9-rotor, 11-flaring circle, 31-oblique hole. DETAILED DESCRIPTION

[0014] like Figures 1 to 3 As shown, a structure for axial expansion and locking of a gear comprises a locking nut 1, a gear 3, a bearing 5, a bearing 5 seat 6, a bushing 7 and a rotor assembly. The rotor assembly comprises a rotor 9 and a shaft 8. Two bearings 5 are sleeved on the shaft 8. The inner ring of the bearing 5 on the side close to the rotor 9 abuts against the rotor 9. The bearing 5 is installed in the mounting holes on both sides of the bearing 5 seat 6. The gear 3 is installed on the side of the shaft 8 of the rotor assembly away from the rotor 9. The locking nut 1 is threadedly connected to the shaft 8 to lock the gear 3. A bushing 7 is provided, and both ends of the bushing 7 abut against the inner ring of the bearing 5. The length of the bushing 7 is greater than the distance between the mounting holes on both sides of the bearing 5 seat 6, so that there is a gap between the inner end faces of the outer rings of the two bearings 5 and the end faces of the bearing 5 seat 6, ensuring that the outer rings of the bearings 5 are not subjected to axial force. The end face of the gear 3 is provided with an inclined hole 31, and the locking nut 1 is provided with a flared circle 11 corresponding to the position of the inclined hole 31. After the locking nut 1 is locked, the flared circle 11 corresponds to the position of the inclined hole 31. The flared circle 11 is knocked into the inclined hole 31 using a tool to limit and prevent loosening, thereby preventing the locking nut 1 from loosening.

[0015] An adjusting washer 4 is provided between the gear 3 and the bearing 5, and the two ends of the adjusting washer 4 are respectively in contact with the gear 3 and the inner ring of the bearing 5. When installing the gear 3, the adjusting washer 4 is used to adjust the axial position of the gear 3 to ensure that the gear 3 is normally engaged; the gap between the inner end face of the outer ring of the bearing 5 and the end face of the bearing 5 seat 6 is not greater than the clearance of the bearing 5, ensuring the normal operation of the bearing 5; a key 2 is provided between the gear 3 and the shaft 8 to ensure that the gear 3 and the rotor assembly rotate synchronously; there are eight inclined holes 31 on the gear 3, which are distributed circumferentially with the axis of the gear 3, and there are also eight flaring circles 11 on the locking nut 1, which are distributed circumferentially with the axis of the locking nut 1, to ensure that when the locking nut 1 is locked, at least one inclined hole 31 corresponds to the position of the flaring circle 11, thereby preventing the locking nut 1 from loosening.

[0016] During installation, first install the right bearing 5 between the bearing 5 seat 6 and the shaft 8, install the bushing 7 on the shaft 8, and then install the left bearing 5 so that the two ends of the bushing 7 abut against the inner rings of the bearings 5 on both sides. According to the working position of the gear 3, select an adjusting washer 4 of appropriate length and install it on the shaft 8, then install the gear 3 to ensure that the axial position of the gear 3 is accurate. The locking nut 1 is threadedly connected to the shaft 8. When the locking nut 1 is tightened, the flared circle 11 on the locking nut 1 corresponds to at least one pair of positions of the inclined hole 31 on the gear 3. Use a tool to knock the corresponding flared circle 11 into the inclined hole 31, which effectively prevents the locking nut 1 from loosening and has a good locking effect.

[0017] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gear axial expansion locking structure, comprising a locking nut (1), a gear (3), a bearing (5), a bearing seat (6), a bushing (7) and a rotor assembly, wherein the rotor assembly comprises a rotor (9) and a shaft (8), wherein two bearings (5) are sleeved on the shaft (8), wherein the inner ring of the bearing (5) on the side close to the rotor (9) abuts against the rotor (9), and the bearing (5) is mounted in the mounting holes on both sides of the bearing seat (6), and the gear (3) is mounted on the shaft (8) of the rotor assembly away from the rotor (9). On one side, the locking nut (1) is threadedly connected to the shaft (8) to lock the gear (3), a bushing (7) is provided between the two bearings (5), both ends of the bushing (7) are in contact with the inner ring of the bearing (5), the length of the bushing (7) is greater than the distance between the mounting holes on both sides of the bearing seat (6), so that there is a gap between the inner end faces of the outer rings of the two bearings (5) and the end face of the bearing seat (6), the end face of the gear (3) is provided with an oblique hole (31), and the locking nut (1) is provided with a flared circle (11) corresponding to the position of the oblique hole (31).

2. The gear axial expansion and locking structure according to claim 1, characterized in that: An adjusting washer (4) is provided between the gear (3) and the bearing (5), and two ends of the adjusting washer (4) are respectively in contact with the gear (3) and the inner ring of the bearing (5).

3. The gear axial expansion and locking structure according to claim 1, characterized in that: The gap between the inner end face of the outer ring of the bearing (5) and the end face of the bearing seat (6) is no greater than the clearance of the bearing (5).

4. The gear axial expansion and locking structure according to claim 1, characterized in that: A key (2) is provided between the gear (3) and the shaft (8).

5. The gear axial expansion and locking structure according to claim 1, characterized in that: There are eight inclined holes (31) on the gear (3), which are distributed around the axis of the gear (3); there are also eight flaring circles (11) on the locking nut (1), which are distributed around the axis of the locking nut (1).

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