Bearing for unmanned aerial vehicle transmission system

Abstract

The invention relates to the technical field of bearings, and discloses an unmanned aerial vehicle transmission system bearing which comprises an outer ring, a plurality of rollers are arranged in the outer ring in a circumferential array shape, a control structure is arranged in the outer ring, a protection structure is arranged on the front face of the outer ring, and the control structure comprises an inner ring. The bearing for the unmanned aerial vehicle transmission system is provided with a protection structure and a control structure, and the control structure can be matched with the inner ring with the arc-shaped protrusions through the partition blocks to conduct normal use positioning on the rollers; when the rollers are pressed, the rollers can move towards the left side and the right side in a small range, normal operation of the rollers is not affected, meanwhile, high-temperature abrasion caused by extrusion deformation is avoided, the protection structures can continuously impact the protruding blocks through the protruding sliding rods, clear and variable bouncing is formed, and the service life of the rollers is prolonged. A user can judge whether the bearing is deformed or not through bouncing at the moment of opening the unmanned aerial vehicle when using the unmanned aerial vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of bearings, and particularly to a bearing for a drone drive system. Background Art

[0002] In the patent application with the application publication number CN110307257A, it includes an upper bearing plate. An upper bearing plate inner ring is arranged in the middle of the upper bearing plate. An oil guiding groove is arranged in the inner groove of the upper bearing plate. An oil filling hole is arranged in the middle of the oil guiding groove. A steel ball cage is installed on one side of the upper bearing plate. A number of steel balls are arranged inside the steel ball cage. A steel ball cage inner ring is arranged in the middle of the steel ball cage. A lower bearing plate is arranged on one side of the steel ball cage. A lower bearing plate inner ring is arranged in the middle of the lower bearing plate. The advantages are as follows: Through the arrangement of the oil guiding groove, an oil filling hole is arranged on the upper bearing plate of the thrust ball bearing. The oil filling hole is connected to the oil guiding groove in the steel ball inner groove of the upper bearing plate. When the thrust ball bearing operates, the lubricating oil stored in the oil guiding groove can be continuously supplied to the steel balls within a certain period of time, thereby reducing the number of times of disassembling and refilling the thrust ball bearing, reducing the frictional resistance between the steel balls and the inner grooves of the upper and lower bearing plates, and further improving the original performance and working efficiency of the bearing. Especially for drones such as racing drones that require high-speed rotation, the requirements for component bearings are higher. Through a series of lubrication measures of the oil guiding groove, the rotation of the drone propeller is smoother.

[0003] In the prior art including the above-mentioned patent, when the bearing is knocked into the device during use, the outer ring of the bearing may be deformed. After long-term high-speed operation, the cage or rollers for fixing the rollers may be displaced. In addition, incorrect installation or low precision of the bearing may cause the bearing to have deflection, generate torque during rotation, cause heating or wear. Moreover, improper installation will also cause an increase in vibration and noise. All these situations will cause the bearing to generate high temperature during rotation, affecting the service life and normal use of the bearing. Summary of the Invention

[0004] The problem to be solved by the present invention is that the deformation of the radial rolling bearing during operation leads to temperature rise, affecting the service life and being unable to be detected in time.

[0005] To solve the above technical problems, the technical solution of the present invention is: A bearing for a drone drive system includes an outer ring. A number of rollers are arranged in a circumferential array inside the outer ring. A control structure is arranged inside the outer ring. A protection structure is arranged on the front surface of the outer ring. The control structure includes an inner ring. A number of arc-shaped raised blocks are arranged on the surface of the inner ring. A plane is opened at the top of the arc-shaped raised block. The plane is in contact with the roller. A hole groove is opened on the front surface of the inner ring. A sliding rod is slidably arranged inside the hole groove. A limiting spring is arranged on the front surface of the sliding rod. The front surface of the limiting spring is fixedly connected to the inner wall of the hole groove.

[0006] Preferably, a cage is provided outside the inner ring, and a plurality of spacers are arranged on the cage in a circumferential array. The gaps between the plurality of spacers are adapted to the rollers.

[0007] Preferably, both sides of the top of the spacer are arc-shaped, and there is a gap between the arc position of the spacer and the cage.

[0008] Preferably, a threaded groove is formed on the front surface of the inner wall of the inner ring.

[0009] Preferably, the protection structure includes a protective cover. A threaded sleeve is rotatably connected to the back surface of the protective cover, and the threaded sleeve is adapted to the threaded groove.

[0010] Preferably, a groove is provided on the back surface of the protective cover. A cavity is formed inside the groove, and an empty groove is formed on the front surface of the groove. A plurality of return springs are fixedly provided on the front surface of the inner wall of the cavity, and a movable ring is fixedly provided on the front surface of the return springs.

[0011] Preferably, a plurality of protrusions are arranged on the front surface of the movable ring in a circumferential array, and the protrusions are adapted to the empty groove.

[0012] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) A protection structure and a control structure are provided inside the outer ring. The control structure can position the rollers for normal use through the cooperation of the spacers and the inner ring with arc-shaped protrusions. When the rollers are pressed, the arc-shaped protrusions on the spacers can be squeezed, and the rollers can move a small distance to the left and right. Without affecting the normal operation of the rollers, high-temperature wear caused by extrusion deformation can be avoided. After the rollers move (i.e., are squeezed or the cage is deformed), the slide rod will be squeezed to make the slide rod protrude. The protection structure can continuously hit the protrusions through the protruding slide rod to form a clearly distinguishable popping sound, so that the user can judge whether the bearing is deformed through the popping sound when the drone is turned on; (2) Subsequently, the deformation position can also be known from the popping sound position by slowly rotating the inner ring of the bearing, so as to quickly find the deformation point of the bearing installation position of the drone and make timely repair and adjustment to avoid the same extrusion situation for the subsequently installed bearings. The protective cover is of a detachable type. During use, it only needs to be screwed tightly to install. The installation method is fast and easy to operate, and the protective cover and the inner ring are of an embedded type. Therefore, the installation of the protective cover will not change the inner diameter of the inner ring, so it can be fully adapted to the docking of various parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the outer ring of the present invention; Figure 3 Explosion schematic diagram of the inner structure of the outer ring of the present invention; Figure 4 Schematic diagram of the cage structure of the present invention; Figure 5 Front view schematic diagram of the inner ring structure of the present invention; Figure 6 Cross-sectional schematic diagram of the inner ring structure of the present invention; Figure 7 Schematic diagram of the thread groove structure of the present invention; Figure 8 Side view schematic diagram of the inner ring structure of the present invention; Figure 9 Rear view explosion schematic diagram of the protective cover structure of the present invention; Figure 10 Rear view schematic diagram of the protective cover structure of the present invention; Figure 11 Schematic diagram of the convex block structure of the present invention; Figure 12 Schematic diagram of the slide bar structure of the present invention.

[0014] In the figure: 1. Outer ring; 2. Protective structure; 201. Return spring; 202. Convex block; 203. Movable ring; 204. Thread sleeve; 205. Protective cover; 206. Empty groove; 3. Control structure; 301. Inner ring; 302. Cage; 303. Thread groove; 304. Spacer; 305. Slide bar; 306. Limiting spring; 4. Roller. Detailed implementation manners

[0015] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0016] Unless otherwise defined, technical terms or scientific terms used in this disclosure shall have the ordinary meanings as understood by those of ordinary skill in the art to which this disclosure pertains. As used in this disclosure, words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. Words such as "upper", "lower", "left", and "right" are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0017] As Figures 1 to 12 shown, a bearing for a drone drive system provided by the present invention includes an outer ring 1. Inside the outer ring 1, a number of rollers 4 are arranged in a circumferential array. A control structure 3 is provided inside the outer ring 1, and a protective structure 2 is provided on the front surface of the outer ring 1. The control structure 3 includes an inner ring 301. On the surface of the inner ring 301, a number of arc-shaped raised blocks are provided. On the top of the arc-shaped raised blocks, a flat surface is provided. Where the flat surface contacts the roller 4, a hole groove is provided on the front surface of the inner ring 301. Inside the hole groove, a sliding rod 305 is slidably provided. On the front surface of the sliding rod 305, a limiting spring 306 is provided, and the front surface of the limiting spring 306 is fixedly connected to the inner wall of the hole groove.

[0018] A cage 302 is provided outside the inner ring 301. On the cage 302, a number of partition blocks 304 are arranged in a circumferential array. The gaps between the number of partition blocks 304 are adapted to the rollers 4.

[0019] On both sides of the top of the partition block 304 are arc-shaped. There are gaps between the arc positions of the partition block 304 and the cage 302.

[0020] A threaded groove 303 is provided on the front surface of the inner wall of the inner ring 301.

[0021] The protective structure 2 includes a protective cover 205. On the back surface of the protective cover 205, a threaded sleeve 204 is rotatably connected. The threaded sleeve 204 is adapted to the threaded groove 303.

[0022] On the back surface of the protective cover 205, a groove is provided. Inside the groove, a cavity is provided. On the front surface of the groove, an empty groove 206 is provided. On the front surface of the inner wall of the cavity, a number of return springs 201 are fixedly provided. On the front surface of the return springs 201, a movable ring 203 is fixedly provided.

[0023] On the front surface of the movable ring 203, a number of convex blocks 202 are arranged in a circumferential array. The convex blocks 202 are adapted to the empty groove 206.

[0024] Working principle and usage process of the present invention: When in use, the entire bearing is installed at the position where the bearing needs to be installed on the drone. After installation, if the position is relatively small and causes extrusion to the outer ring 1, resulting in slight deformation, or if the retainer deforms after long-term use, it will cause high-temperature generated by the high-speed rotation and friction of the rollers 4, affecting the overall service life of the bearing. When the rollers 4 encounter the deformed area and are extruded, the extrusion force will be transferred to the arc plate positions on both sides of the top of the spacer block 304. The arc plate positions will bend slightly to one side, and due to the resilience of the arc plate, after the rollers 4 leave the oppressed position, the rollers 4 will return to the initial position. In this way, it can relieve the rollers 4 to a certain extent when facing the extrusion during normal operation. After the rollers 4 extruded to one side move a certain distance, they will extrude the slide bar 305. After being extruded, the slide bar 305 will move forward to form a protruding round block. At this time, the movement of the round block will impact the convex block 202. After being impacted, the convex block 202 drives the movable ring 203 to move backward and compress the return spring 201. With the rapid impact, a clicking sound will be emitted, reminding the user that the outer ring 1 of the bearing has undergone slight deformation, or when starting the drone after long-term use and hearing a popping sound, it also means that the bearing has deformed and needs to be replaced. If a sound is heard during the trial operation after installation, it can be considered whether there is a deviation in the size of the inner cavity of the outer ring 1 where the device is placed. The extrusion area can be quickly located by slowly rotating the bearing through the position of the popping sound to check whether maintenance is required.

[0025] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A bearing for an unmanned aerial vehicle transmission system, comprising an outer ring (1), characterized in that: A plurality of rollers (4) are arranged in a circular array inside the outer ring (1), a control structure (3) is arranged inside the outer ring (1), and a protective structure (2) is arranged on the front side of the outer ring (1); The control structure (3) comprises an inner ring (301), the surface of the inner ring (301) is provided with a plurality of arc-shaped protrusions, the top of the arc-shaped protrusions is provided with a plane, the plane is connected to the roller (4), the front of the inner ring (301) is provided with a hole groove, the inside of the hole groove is provided with a sliding rod (305) for sliding, the front of the sliding rod (305) is provided with a limit spring (306), and the front of the limit spring (306) is fixedly connected to the inner wall of the hole groove.

2. The bearing for an unmanned aerial vehicle drive system according to claim 1, wherein: A retaining frame (302) is provided outside the inner ring (301), and a plurality of spacers (304) are provided on the retaining frame (302) in a circumferential array, and the gaps between the plurality of spacers (304) are adapted to the roller (4).

3. The bearing for an unmanned aerial vehicle drive system according to claim 2, wherein: Both sides of the top of the spacer block (304) are arc-shaped, and a gap is provided between the arc position of the spacer block (304) and the retaining frame (302).

4. A bearing for a drone drive system according to claim 1, characterized in that: A thread groove (303) is provided on the front side of the inner wall of the inner ring (301).

5. A bearing for a drone drive system according to claim 1, characterized in that: The protective structure (2) comprises a protective cover (205), the back side of the protective cover (205) being rotatably connected to a threaded sleeve (204), the threaded sleeve (204) being adapted to the threaded groove (303).

6. A bearing for an unmanned aerial vehicle drive system according to claim 5, characterized in that: The protective cover (205) is provided with a groove on the back side, a cavity is provided inside the groove, an empty slot (206) is provided on the front side of the groove, a plurality of return springs (201) are fixedly provided on the front side of the inner wall of the cavity, and a movable ring (203) is fixedly provided on the front side of the return spring (201).

7. A bearing for an unmanned aerial vehicle drive system according to claim 6, characterized in that: The front side of the movable ring (203) is provided with a plurality of protrusions (202) in a circular array, and the protrusions (202) are matched with the empty grooves (206).

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