Block check ring for shaft and axial limiting structure

Abstract

The invention discloses a block check ring for a shaft and an axial limiting structure. A plurality of block units are sequentially arranged in an annular groove between the outer shaft face of a shaft part and the hole wall of a hole part along an annular path to form the block check ring clamped with the annular groove in the axial direction. Further, the matched connection of the shaft part and the hole part is axially limited; according to the bidirectional limiting device, axial bidirectional limiting can be conducted on shaft parts and hole parts, anti-loosening treatment does not need to be conducted, and stable connection of the shaft parts and the hole parts can be more conveniently, rapidly and effectively guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of shaft retaining rings and relates to a block retaining ring and an axial limiting structure for a shaft. Background Art

[0002] The internal structure of hydraulic actuators requires many axial positioning and limiting methods. At present, the commonly used axial limiting methods in hydraulic actuators are mainly: shaft shoulder, shaft collar limiting, set screw limiting, sleeve limiting. These limiting methods all have certain defects. For example, the shaft shoulder limiting method can only limit in one direction, the set screw limiting method needs to be prevented from loosening, and the sleeve limiting method occupies a large space.

[0003] Therefore, in view of the above-mentioned problems existing in the process of matching and connecting shaft parts and hole parts inside the existing hydraulic actuator, the present invention discloses a block retaining ring and an axial limiting structure for the shaft. Summary of the invention

[0004] The object of the present invention is to provide a split retaining ring and an axial limiting structure for a shaft, which can perform axial bidirectional limiting on shaft parts and hole parts with a split structure.

[0005] The present invention is achieved through the following technical solutions:

[0006] A block retaining ring for a shaft is used for axially limiting the connection between shaft parts and hole parts. The block retaining ring includes a plurality of block units, which are arranged in sequence along a circular path to form an annular block retaining ring; gaps are reserved between adjacent block units.

[0007] When shaft parts and hole parts are matched with each other, annular grooves are correspondingly arranged on the outer shaft surface of the shaft parts and the hole wall of the hole parts. A number of block units are sequentially loaded into the annular groove between the shaft surface and the hole surface along an annular path until the annular groove is filled to form a block retaining ring. Through the matching of the block retaining ring and the annular groove, axial bidirectional limiting of the shaft hole matching of the shaft parts and the hole parts is achieved.

[0008] In order to better implement the present invention, further, the block unit includes a first limiting protrusion extending toward the hole wall of the hole-type part, and a second limiting protrusion extending toward the outer axial surface of the shaft-type part.

[0009] In order to better implement the present invention, further, the segmented retaining ring includes at least three segmented units sequentially arranged along the annular path.

[0010] In order to better implement the present invention, further, the gap width between adjacent block units is 0.1-0.3 mm.

[0011] An axial limiting structure is realized based on the above-mentioned block retaining ring, including shaft parts and hole parts. The shaft parts are provided with an annular shaft surface groove on the outer shaft surface, and the hole walls of the hole parts are provided with an annular hole surface groove. Several block units in the block retaining ring are distributed in sequence between the annular shaft surface groove and the annular hole surface groove along an annular path.

[0012] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0013] The present invention arranges a plurality of block units in sequence along an annular path in the annular groove between the outer axial surface of the shaft part and the hole wall of the hole part to form a block retaining ring axially engaged with the annular groove, thereby axially limiting the matching connection between the shaft part and the hole part; the present invention can axially limit the shaft part and the hole part in both directions without the need for anti-loosening treatment, and can more conveniently and effectively ensure the stable connection between the shaft part and the hole part. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the block retaining ring;

[0015] Figure 2 It is a schematic diagram of the splicing of block units;

[0016] Figure 3 It is a schematic diagram of shaft parts;

[0017] Figure 4 It is a schematic diagram of hole parts;

[0018] Figure 5 This is a schematic diagram of the matching between shaft parts and hole parts.

[0019] Among them: 1-block unit; 2-shaft parts; 3-hole parts; 11-first limiting protrusion; 12-second limiting protrusion; 21-annular shaft surface groove; 31-annular hole surface groove. DETAILED DESCRIPTION

[0020] The following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the present invention explicitly states otherwise, singular forms are also intended to include plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0022] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0023] Terminology explanation section: The terms "install", "connect", "connect", "fixed" and the like in the present invention should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be an internal connection between two elements, or an interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0024] Embodiment 1:

[0025] A segmented retaining ring for a shaft in this embodiment is used for axially limiting the connection between shaft parts and hole parts. The segmented retaining ring includes a plurality of segmented units 1, which are arranged in sequence along a circular path to form an annular segmented retaining ring; gaps are reserved between adjacent segmented units 1.

[0026] like Figure 1 and Figure 2 As shown, an annular groove is correspondingly arranged on the outer axial surface of the shaft part and the hole wall of the hole part, and a plurality of block units 1 are sequentially filled into the annular groove along an annular path to form a block retaining ring clamped in the annular groove. The axial matching limit of the shaft part and the hole part is realized by the clamping fit between the block retaining ring and the annular groove.

[0027] Furthermore, in order to ensure the convenience of installation of the block units 1 and to ensure that the block retaining rings have a certain degree of adjustment capability after being clamped in the annular groove, gaps are reserved between adjacent block units 1 .

[0028] Embodiment 2:

[0029] A block retaining ring for a shaft is improved on the basis of embodiment 1, such as Figure 2 As shown, the block unit 1 includes a first limiting protrusion 11 extending toward the hole wall of the hole-type part, and a second limiting protrusion 12 extending toward the outer axial surface of the shaft-type part. The first limiting protrusion 11 extends to the annular groove on the hole wall of the hole-type part for clamping, and the second limiting protrusion 12 extends to the annular groove on the outer axial surface of the shaft-type part for clamping, thereby realizing the limiting installation of the entire block retaining ring between the shaft-type part and the hole-type part.

[0030] The other parts of this embodiment are the same as those of Embodiment 1, and thus will not be described in detail.

[0031] Embodiment 3:

[0032] A block retaining ring for a shaft, improved on the basis of embodiment 1 or 2, such as Figure 1 and Figure 2 As shown, the segmented retaining ring includes at least three segmented units 1 arranged in sequence along the annular path. As shown in the figure, the segmented retaining ring includes twelve segmented units 1 arranged in sequence along the annular path, and the number of segmented units 1 can be adjusted according to the diameter of the shaft parts and the hole parts.

[0033] Furthermore, the gap width between adjacent block units 1 is 0.1-0.3 mm, and it is necessary to ensure that the sum of the gap widths between all the block units 1 is less than or equal to 2 mm.

[0034] The other parts of this embodiment are the same as those of Embodiment 1 or 2, and thus will not be described in detail.

[0035] Embodiment 4:

[0036] An axial limiting structure is implemented based on the block retaining ring described in any one of embodiments 1-3, such as Figure 3-Figure 5 As shown, it includes a shaft part 2 and a hole part 3. The outer shaft surface of the shaft part 2 is provided with an annular shaft surface groove 21, and the hole wall of the hole part 3 is provided with an annular hole surface groove 31. The several block units 1 in the block retaining ring are distributed in sequence between the annular shaft surface groove 21 and the annular hole surface groove 31 along an annular path.

[0037] As shown in the figure, an annular hole surface groove 31 is provided on the hole wall of the hole part 3, and an annular axial surface groove 21 is provided on the outer axial surface of the shaft part 2. When assembling the shaft part 2 and the hole part 3, a plurality of block units 1 are loaded into the inside of the annular axial surface groove 21 along an annular path, and then the shaft part 2 is inserted into the inside of the hole part 3 until the plurality of block units 1 are in place and snap-fitted into the annular hole surface groove 31, thus completing the limited installation of the shaft part 2 and the hole part 3.

[0038] The other parts of this embodiment are the same as any one of Embodiments 1-3, so they are not described again.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. A block retaining ring for a shaft, used for axial limiting connection between shaft parts and hole parts, characterized in that: The segmented retaining ring comprises a plurality of segmented units (1), and the segmented units (1) are arranged in sequence along an annular path to form an annular segmented retaining ring; gaps are reserved between adjacent segmented units (1).

2. A block retaining ring for a shaft according to claim 1, characterized in that: The block unit (1) comprises a first limiting protrusion (11) extending towards the hole wall of the hole-type part, and a second limiting protrusion (12) extending towards the outer axial surface of the shaft-type part.

3. A block retaining ring for a shaft according to claim 2, characterized in that: The segmented retaining ring comprises at least three segmented units (1) which are sequentially arranged along an annular path.

4. A block retaining ring for a shaft according to claim 3, characterized in that: The gap width between adjacent block units (1) is 0.1-0.3 mm.

5. An axial limiting structure, implemented based on the segmented retaining ring according to any one of claims 1 to 4, characterized in that: The invention comprises a shaft part (2) and a hole part (3), wherein an annular shaft surface groove (21) is arranged on the outer shaft surface of the shaft part (2), an annular hole surface groove (31) is arranged on the hole wall of the hole part (3), and a plurality of segmented units (1) in the segmented retaining ring are sequentially distributed between the annular shaft surface groove (21) and the annular hole surface groove (31) along an annular path.

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