A fixed bearing

Abstract

The utility model discloses a fixed bearing relates to unmanned plane bearing technical field, including installation shell, outer ring, retainer, roller pin, elastic clamping piece, installation shell and outer ring all are annular setting, wherein: installation shell inside is equipped with installation groove, outer ring is embedded in the installation groove through interference fit, the inner wall of outer ring and the position corresponding of roller pin all are equipped with guide groove, and the both sides of guide groove are fixedly installed with limit block and blocking block respectively, when using, installs the installation groove between outer ring and installs through interference fit, and effectively guarantees the installation precision of outer ring and installation shell inside, simultaneously, through the guide groove and its both sides limit block and blocking block of setting, can limit the one side rotation of roller pin when using, thereby makes the bearing only can unidirectionally rotate along the inclined plane direction of guide groove.

Description

Technical Field

[0001] This utility model specifically relates to the field of unmanned aerial vehicle (UAV) bearing technology, and more specifically to a fixed bearing. Background Technology

[0002] Fixed bearings offer high stability and reliability, effectively meeting the operational needs of drones in high-speed and complex environments. However, the fit between the traditional bearing housing and the bearing outer ring is relatively low, which can easily cause loosening and large vibrations during high-speed operation, affecting the stability of the drone during operation. A search revealed Chinese Patent Publication No. CN201822047939.X, which discloses a novel fixed bearing. The bearing includes: an inner ring; an outer ring sleeved around the inner ring; a roller disposed between the inner and outer rings; and a ring-shaped fixing connector sleeved around the outer ring. The inner and outer rings are made of metal, the fixing connector is made of plastic, and one of the inner wall of the fixing connector and the outer wall of the outer ring has a locking groove, while the other has a first locking portion for locking within the locking groove. When the outer ring of the aforementioned patent mates with the fixed connector, the fixed connector may overheat during high-speed rotation of the bearing, leading to further wear. This can cause a gap between the outer ring of the bearing and the inner wall of the fixed connector, resulting in significant vibration during bearing rotation and affecting the stability of the equipment. Utility Model Content

[0003] The purpose of this invention is to provide a fixed bearing. In this device, the bearing is installed in the mounting groove inside the mounting housing. The side walls on both sides of the mounting groove effectively limit the bearing's position. At the same time, after the bearing is completed, the guide groove and the limiting blocks and blocking blocks on both sides restrict the rotation of one side of the needle roller during use, so that the bearing can only rotate unidirectionally along the inclined surface of the guide groove; thus solving the problems mentioned above in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A fixed bearing includes a housing fixed bearing, an outer ring fixed bearing, a cage fixed bearing, and a needle roller fixed bearing. Both the mounting housing and the outer ring are annular, wherein: the mounting housing has a mounting groove on its inner side; and the outer ring is fitted into the mounting groove by an interference fit. The inner wall of the outer ring is provided with guide grooves at the positions corresponding to the roller, and limit blocks and blocking blocks are fixedly installed on both sides of the guide grooves respectively.

[0005] As a further technical solution of this utility model, the cage-fixed bearing is located inside the outer ring fixed bearing, the needle roller fixed bearing is evenly distributed in the raceway of the cage-fixed bearing, and the chamfers at both ends of the needle roller fixed bearing are matched with the chamfers of the rectangular groove. As a further technical solution of this utility model, the side walls on both sides of the mounting groove are integrally formed with the mounting shell, wherein the width of one side wall of the mounting groove is 1.5 times the width of the other side wall. As a further technical solution of this utility model, one side of the needle roller fixed bearing is in contact with the outer ring fixed bearing; the outer side of the outer ring fixed bearing is in contact with the inner wall of the mounting groove fixed bearing. As a further technical solution of this utility model, one end of the guide groove fixed bearing is an arc surface and the other end is an inclined surface. The limiting block fixed bearing is located at the center position of the guide groove fixed bearing near the arc surface. The blocking block fixed bearing is located on the side of the guide groove fixed bearing near the inclined surface. Two sets of blocking block fixed bearings are provided, and the two sets of blocking block fixed bearings are installed symmetrically. As a further technical solution of this utility model, the limiting block is an inclined arc-shaped spring sheet structure, which contacts the side of the needle roller to limit the rotation of the needle roller.

[0006] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, the mounting groove and the outer ring are installed with an interference fit, which effectively ensures the installation accuracy between the outer ring and the inside of the mounting shell, effectively ensuring the stability during installation, thereby improving work efficiency. This utility model, through the setting of the guide groove and the limiting blocks and blocking blocks on both sides thereon, can restrict the rotation of one side of the needle roller during use, so that the bearing can only rotate in one direction along the inclined surface of the guide groove. In this invention, when the bearing is engaged with a rotating shaft, one side of the needle roller is in contact with the inner wall of the outer ring, and the opposite side is in contact with the rotating shaft. By the rolling of the needle roller in the rectangular groove opened on the surface of the cage, the working efficiency of the bearing is effectively realized. Attached Figure Description

[0007] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0008] Figure 2 This utility model Figure 1 Another perspective on the structural breakdown diagram.

[0009] Figure 3 This utility model Figure 2 Front view of the bearing.

[0010] Figure 4 This utility model Figure 3 Sectional view of AA.

[0011] Figure 5 This is a schematic diagram of the internal structure of the needle roller in this utility model.

[0012] Figure 6 This utility model Figure 5 Enlarged view of part of the structure.

[0013] In the diagram: 1-mounting housing, 2-cage, 3-needle roller, 4-mounting groove, 5-outer ring, 6-guide groove, 7-limiting block, 8-blocking block. Detailed Implementation

[0014] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-6 In this embodiment of the present invention, a fixed bearing includes a mounting housing 1, an outer ring 5, a cage 2, and needle rollers 3; Both the mounting housing 1 and the outer ring 5 are annular, wherein: the mounting housing 1 has a mounting groove 4 on its inner side; and the outer ring 5 is fitted into the mounting groove 4 by an interference fit. The inner wall of the outer ring 5 is provided with guide grooves 6 at the positions corresponding to the needle rollers 3, and limit blocks 7 and blocking blocks 8 are fixedly installed on both sides of the guide grooves 7 respectively.

[0016] In this embodiment, the cage 2 is located inside the outer ring 5, the needle rollers 3 are evenly distributed in the raceway of the cage 2, and the chamfers at both ends of the needle rollers 3 are in conjunction with the chamfers of the rectangular grooves; By adopting the above technical solution, during use, the mounting groove 4 and the outer ring 5 are installed with an interference fit, which effectively ensures the installation accuracy between the outer ring 5 and the inside of the mounting shell 1, effectively ensuring the stability during use, thereby improving work efficiency. In this embodiment, the side walls on both sides of the mounting groove 4 are integrally formed with the mounting housing 1, wherein the width of one side wall of the mounting groove 4 is 1.5 times the width of the other side wall; In this embodiment, one side of the needle roller 3 is in contact with the outer ring 5; the outer side of the outer ring 5 is in contact with the inner wall of the mounting groove 4. By adopting the above technical solution, the outer ring 6 can be effectively rotated along the mounting groove 5 during operation, thus achieving stability between the needle roller 3 and the workpiece. In this embodiment, one end of the guide groove 6 is an arc surface and the other end is an inclined surface. The limiting block 7 is located at the center of the guide groove 6 near the arc surface. The blocking block 8 is located on the side of the guide groove 6 near the inclined surface. Two sets of blocking blocks 8 are provided, and the two sets of blocking blocks 8 are installed symmetrically. In this embodiment, the limiting block 7 is an inclined arc-shaped spring sheet structure, which contacts the side of the needle roller 3 to limit the rotation of the needle roller 3. By adopting the above technical solution, during the use of the bearing, the needle roller 3 rotates inside the guide groove 6. When rotating in the forward direction, the needle roller 3 rotates on the inclined plane. When it rotates to the end of the inclined plane, it is affected by two sets of blocking blocks 8. At this time, the needle roller 3 rotates normally inside the guide groove 6. Furthermore, during reverse rotation, the needle roller 3 rotates on the arc surface. When it reaches the end of the arc surface, it is acted upon by the limiting block 7. The limiting block 7 is an inclined arc-shaped spring structure. When the limiting block 7 contacts the side of the needle roller 3, it restricts the rotation process of the needle roller 3. At this time, the needle roller 3 no longer rotates, thus realizing the unidirectional rotation function.

[0017] The working principle of this utility model is as follows: the needle roller 3 is movably installed in the rectangular groove opened on the surface of the cage 2. The rectangular groove effectively ensures the rotation effect of the needle roller 3. Then, the cage 2 and the needle roller 3 are installed inside the outer ring 5. The side plates on both sides of the outer ring 5 are attached to the two sides of the cage 2, effectively limiting the position of the cage 2 through the outer ring 5. The outer ring 5 is then fitted into the mounting groove 4 by an interference fit. The inner wall of the outer ring 5 is provided with a guide groove 6 corresponding to the needle roller 3. During the use of this bearing, the needle roller 3 rotates inside the guide groove 6. When rotating in the forward direction, the needle roller 3 rotates on the inclined plane. When it rotates to the end of the inclined plane, it is subjected to the action of two sets of blocking blocks 8. At this time, the needle roller 3 rotates normally inside the guide groove 6. Furthermore, during reverse rotation, the needle roller 3 rotates on the arc surface. When it reaches the end of the arc surface, it is acted upon by the limiting block 7. The limiting block 7 is an inclined arc-shaped spring structure. When the limiting block 7 contacts the side of the needle roller 3, it restricts the rotation process of the needle roller 3. At this time, the needle roller 3 no longer rotates, thus realizing the unidirectional rotation function.

[0018] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fixed bearing, characterized in that: Includes mounting housing (1), outer ring (5), cage (2), needle roller (3); The mounting housing (1) and the outer ring (5) are both annular, wherein: the mounting housing (1) has a mounting groove (4) on its inner side; the outer ring (5) is fitted into the mounting groove (4) by an interference fit; The inner wall of the outer ring (5) is provided with guide grooves (6) at the positions corresponding to the needle rollers (3), and limit blocks (7) and blocking blocks (8) are fixedly installed on both sides of the guide grooves (6); one end of the guide groove (6) is an arc surface and the other end is an inclined surface. The limit block (7) is located at the center of the guide groove (6) near the arc surface, and the blocking block (8) is located on the side of the guide groove (6) near the inclined surface. There are two sets of blocking blocks (8), and the two sets of blocking blocks (8) are installed symmetrically.

2. A fixed bearing according to claim 1, characterized in that: The cage (2) is located inside the outer ring (5), and the needle rollers (3) are evenly distributed in the raceway of the cage (2). The chamfers at both ends of the needle rollers (3) are matched with the chamfers of the rectangular groove.

3. A fixed bearing according to claim 1, characterized in that: The side walls on both sides of the mounting groove (4) are integrally formed with the mounting housing (1), and the width of one side of the mounting groove (4) is 1.5 times the width of the other side wall.

4. A fixed bearing according to claim 2, characterized in that: One side of the needle roller (3) is in contact with the outer ring (5); the outer side of the outer ring (5) is in contact with the inner wall of the mounting groove (4).

5. A fixed bearing according to claim 1, characterized in that: The limiting block (7) is an inclined arc-shaped spring structure, which contacts the side of the needle roller (3) to limit the rotation of the needle roller (3).

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