WO2023024362A1 - Highly-unitized joint bearing for aerospace - Google Patents

Abstract

Provided is a highly-unitized joint bearing for aerospace, which comprises an inner ring (2), an outer ring (1), a rocker arm (4) and a gear (5). The inner ring (2) is internally provided with a key groove; the outer ring (1) is sleeved on the inner ring (2); the outer ring (1) is rotatably connected to the inner ring (2); the rocker arm (4) is fixedly connected or detachably connected to the outer ring (1); the rocker arm (4) is provided with a connecting hole (8) used for connecting a shaft rod; and the gear (5) is coaxially and fixedly connected or detachably connected to the outer ring (1). The joint bearing changes the singular function of traditional outer rings, and integrates the rocker arm (4), the gear (5) and the outer ring (1), thereby enriching functions, reducing the number of parts, and reducing assembly difficulty, and has the advantages of diversified functions, being lightweight and having a small volume without interfering with the advantages of the performance of the bearing.

Description

A Highly Unitized Joint Bearing for Aerospace technical field

The invention belongs to the field of aerospace vehicle parts, in particular to a highly unitized joint bearing for aerospace.

Background technique

With the vigorous development of my country's aerospace industry, aerospace precision bearings play a pivotal role as mechanical joints. It is widely used in the field of aircraft execution system, transmission and control system.

As the flying speed of the aircraft becomes faster and faster, the flexibility becomes higher and higher, and the distance of deep space exploration becomes farther and farther, it is particularly important to reduce the weight of the aircraft and realize the integration of multiple functions. Lightweight and diversification have always been the direction of efforts in the field of flight. Bearings have always existed as standard parts in the traditional mechanical field, but the more stringent requirements for them in the aerospace field have also made the inherent shortcomings of bearings a serious obstacle restricting the development of the field. This also makes traditional bearings only maintain their inherent functions of supporting, rotating and reducing friction, and it is difficult to shoulder the functions of other transmissions (such as gear transmission and chain transmission) and fixed motion (such as fixed cycle motion).

Contents of the invention

In view of this, the present invention aims to propose a highly unitized joint bearing for aerospace, so that the bearing can integrate more functions, improve the application scene of the bearing, meet the reliable connection of aerospace and achieve specified actions.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

A highly unitized joint bearing for aerospace, including an inner ring, the inner ring is provided with a keyway;

an outer ring, the outer ring is sleeved on the inner ring, and the outer ring and the inner ring are rotatably connected;

A rocker arm, the rocker arm is fixedly or detachably connected to the outer ring, and the rocker arm is provided with a connecting hole for connecting the shaft;

The gear is coaxially fixed or detachably connected to the outer ring.

Further, a self-lubricating liner is provided between the outer ring and the inner ring.

Further, the inner wall of the outer ring is a concave spherical surface, and the outer wall of the inner ring is a corresponding convex spherical surface.

Further, the maximum rotation angle of the rocker arm around the shaft is less than 180°.

Further, the rocker arm includes a collar portion and a connection portion, the collar portion is fixedly connected to the outer ring, the connection hole is provided on the connection portion, and the opening direction of the connection hole is parallel to the opening direction of the inner ring.

Further, the cross-section of the collar portion is approximately circular.

Further, the connecting part includes two connecting plates arranged symmetrically, and a gap is left between the two connecting plates.

Further, a dust-proof component is provided between the outer ring and the inner ring.

Compared with the prior art, the highly unitized joint bearing for aerospace of the present invention has the following advantages:

(1) The joint bearing of the present invention changes the single function of the traditional outer ring, integrates the rocker arm, gear and outer ring together, enriches the functions, reduces the number of parts, and reduces the difficulty of assembly. Compared with traditional products, it has multiple functions The advantages of miniaturization, light weight and small volume space, without destroying the advantages of the bearing's own performance;

(2) The joint bearing of the present invention can realize the keyway connection between the bearing inner ring and the shaft, satisfying the reliable connection of the bearing inner ring, and will not cause unreliable connection due to the selection of the size of the assembly interference of the bearing outer ring;

(3) The joint bearing of the present invention can realize the function of the rocker arm and the function of the flange connection through the structure change, satisfy the reliable connection of the outer ring of the bearing, and will not be selected due to the size of the assembly interference of the outer ring of the bearing. making the connection unreliable.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic cross-sectional structure diagram of a spherical plain bearing according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the structure of the joint bearing rotating around the shaft according to the embodiment of the present invention.

Explanation of reference signs:

1. Outer ring; 2. Inner ring; 3. Self-lubricating liner; 4. Rocker arm; 5. Gear; 6. Ring sleeve; 7. Connecting plate; 8. Connecting hole.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

The present invention will be described in detail below with reference to the accompanying drawings and examples.

The highly unitized joint bearing for aerospace in the present invention includes an inner ring 2, an outer ring 1, a rocker arm 4, and a gear 5, and the inner ring 2 is provided with a keyway;

The outer ring 1 is sleeved on the inner ring 2, and the outer ring 1 and the inner ring 2 are connected in rotation. The inner wall of the outer ring 1 is a concave spherical surface, and the outer wall of the inner ring 2 is a corresponding convex spherical surface. It can be filled with rolling parts, such as balls, rollers, etc. In order to improve the smoothness of rotation, lubricating oil can also be injected between the outer ring 1 and the inner ring 2, or a self-lubricating liner can be set between the outer ring 1 and the inner ring 2 3. There is a dust-proof component between the outer ring 1 and the inner ring 2 to improve the dust-proof effect of the joint bearing;

The rocker arm 4 and the outer ring 1 are fixedly connected or detachably connected. For example, the rocker arm 4 and the outer ring 1 can be fixed by welding, and the outer ring 1 and the rocker arm 4 can be provided with corresponding threads, which can be detachably connected through the threads. The arm 4 and the outer ring 1 can also be integrally cast and formed. The rocker arm 4 is provided with a connecting hole 8 for connecting the shaft. 4. Connection with other components. At this time, the rocker arm 4 can rotate freely around the shaft, and the maximum rotation angle should be less than 180°;

The rocker arm 4 in this embodiment includes a collar portion 6 and a connecting portion, the cross section of the collar portion 6 is approximately circular, the middle part of the collar portion 6 is provided with an inner hole, the inner hole is provided with a keyway, and the outer wall of the outer ring 1 is provided with a keyway. There is a connecting key corresponding to the keyway, and the connecting key is inserted into the keyway so that the ring sleeve part 6 is sleeved on the outer ring 1, and the ring sleeve part 6 and the outer ring 1 cannot rotate with each other, and the outer ring 1 has a mounting hole , there is a threaded hole on the outer ring 1, and the bolt passes through the mounting hole and threadedly connected with the threaded hole, so that the ring sleeve part 6 and the outer ring 1 can be fixedly connected, the connecting hole 8 is arranged on the connecting part, and the opening direction of the connecting hole 8 Parallel to the opening direction of the inner ring 2, the connecting part includes two connecting plates 7 arranged symmetrically, and there is a gap between the two connecting plates 7, the gap is used for other parts to be inserted, and then the connecting plate 7 is connected with other parts through the shaft. Turn to connect.

The gear 5 and the outer ring 1 are coaxially fixed or detachably connected. For example, the gear 5 and the outer ring 1 can be welded or integrally cast. The outer ring 1 can be provided with a positioning column, and the gear 5 is provided with a positioning The positioning hole corresponding to the column, the positioning column is inserted into the positioning hole, and then the positioning column is threaded through the nut to make the gear 5 and the outer ring 1 fixedly connected.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

A highly unitized joint bearing for aerospace, characterized in that: it includes an inner ring, and a keyway is arranged in the inner ring; an outer ring, the outer ring is sleeved on the inner ring, and the outer ring and the inner ring are rotatably connected; A rocker arm, the rocker arm is fixedly or detachably connected to the outer ring, and the rocker arm is provided with a connecting hole for connecting the shaft; The gear is coaxially fixed or detachably connected to the outer ring. The joint bearing according to claim 1, wherein a self-lubricating liner is provided between the outer ring and the inner ring. The joint bearing according to claim 1, wherein the inner wall of the outer ring is a concave spherical surface, and the outer wall of the inner ring is a corresponding convex spherical surface. The joint bearing according to claim 1, characterized in that: the maximum rotation angle of the rocker arm around the shaft is less than 180°. The joint bearing according to claim 1, characterized in that: the rocker arm includes a collar portion and a connecting portion, the collar portion is fixedly connected to the outer ring, the connecting hole is provided on the connecting portion, and the connecting hole The opening direction is parallel to the opening direction of the inner ring. The spherical plain bearing according to claim 5, characterized in that: the section of the collar portion is approximately circular. The joint bearing according to claim 5, characterized in that: the connecting part comprises two connecting plates arranged symmetrically, and a gap is left between the two connecting plates. The joint bearing according to claim 1, characterized in that: a dustproof assembly is provided between the outer ring and the inner ring.

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