Self-aligning linear bearing

Abstract

The utility model discloses a self-aligning linear bearing, relates to the field of linear bearings, and aims to provide a self-aligning linear bearing which has a self-aligning function, is good in stability and is convenient to assemble and disassemble. The self-aligning linear bearing comprises a linear bearing body, the linear bearing body comprises a bearing shell, a sliding film and O-shaped rings, a round spherical structure is arranged in the middle of the outer side of the bearing shell, the O-shaped rings are arranged on the two sides of the round spherical structure, and snap spring grooves are formed in the two ends of the outer side of the bearing shell respectively. A U-shaped groove and a limiting hole are machined in the middle of the inner side of the bearing shell, the sliding film is installed in the bearing shell, a plurality of protruding limiting blocks are arranged in the middle of the outer side of the sliding film, the protruding limiting blocks are opposite to the U-shaped groove in position, a positioning pin is further arranged in the middle of the outer side of the sliding film, and the positioning pin is opposite to the limiting hole in position. According to the self-aligning linear bearing disclosed by the utility model, errors related to alignment and parallelism can be compensated through the design of the appearance structure of the self-aligning linear bearing.

Description

Technical Field

[0001] The utility model relates to the field of linear bearings, in particular to a self-aligning linear bearing. Background Technique

[0002] A linear bearing is a linear motion system produced at low cost and is used in cooperation with a cylindrical shaft for an infinite stroke. It is widely used in sliding parts of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery. However, in the process of using the existing linear bearing, due to the inconvenience of automatic alignment and the existence of a certain axial deviation between the linear bearing body and the mounting seat, the operation of the linear bearing is not stable enough.

[0003] To solve the above problems, a self-aligning linear bearing is thus proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a self-aligning linear bearing to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: a self-aligning linear bearing, including a linear bearing body, the linear bearing body includes a bearing housing, a sliding film and an O-ring. The middle part of the outer side of the bearing housing is set as a circular spherical surface structure. O-rings are arranged on both sides of the circular spherical surface structure. Circlip grooves are respectively opened at both ends of the outer side of the bearing housing. A U-shaped groove and a limiting hole are machined in the middle part of the inner side of the bearing housing. The sliding film is installed inside the bearing housing. A plurality of protruding limiting blocks are arranged in the middle of the outer side of the sliding film. The protruding limiting blocks are opposite to the position of the U-shaped groove. A positioning pin is also arranged in the middle of the outer side of the sliding film. The positioning pin is opposite to the position of the limiting hole.

[0006] Preferably, U-shaped ring grooves are arranged on both sides of the circular spherical surface structure of the bearing housing, and the O-rings are installed in the U-shaped ring grooves.

[0007] Preferably, the limiting hole is opened on the U-shaped groove and penetrates through the side wall of the bearing housing.

[0008] Preferably, the positioning pin is arranged on one of the protruding limiting blocks.

[0009] Preferably, a plurality of auxiliary grooves are opened on the inner side of the sliding film.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The self-aligning linear bearing of the present utility model can compensate for errors related to alignment and parallelism through the design of its external structures such as the circular spherical structure, O-ring, and snap ring groove; the circular spherical structure can achieve the self-aligning function; the O-ring makes the linear bearing body form an elastic structure, so that the gap between the linear bearing body and the mating base can compensate for possible shaft deviations to the maximum extent.

[0012] The sliding film is made of wear-resistant, self-lubricating, and maintenance-free modified engineering plastics, and the sliding film and the bearing housing are quickly assembled through the raised limit block and the positioning pin, and the auxiliary groove is used to store and discharge the dirt generated during the operation of the shaft. Description of the Drawings

[0013] Figure 1 is a perspective view of the linear bearing body of the present utility model;

[0014] Figure 2 is a schematic structural view of the sliding film in the linear bearing body of the present utility model;

[0015] Figure 3 is a schematic internal structural view of the linear bearing body of the present utility model;

[0016] Figure 4 is a view of the use state of the linear bearing body of the present utility model;

[0017] In the figure: 1. Linear bearing body; 101. Bearing housing; 102. Snap ring groove; 103. U-ring groove; 104. O-ring; 105. Circular spherical structure; 106. Sliding film; 107. Positioning pin; 108. Raised limit block; 109. Auxiliary groove; 110. Limit hole; 111. U-groove; 2. Mating base. Detailed Embodiment

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0019] Please refer to Figures 1-4 , the present utility model provides a self-aligning linear bearing, and the self-aligning linear bearing includes a linear bearing body 1, and the linear bearing body 1 includes a bearing housing 101, a sliding film 106, and an O-ring 104.

[0020] The middle part of the outer side of the bearing housing 101 is provided with a circular spherical surface structure 105 for realizing the self-aligning function of the bearing. U-shaped ring grooves 103 are provided on both sides of the circular spherical surface structure 105 of the bearing housing 101, and an O-ring 104 is assembled in each U-shaped ring groove 103. The O-ring 104 can make the linear bearing body 1 form an elastic bearing seat. Generally, the outer diameter of the linear bearing body 1 is 0.2 - 0.3 mm smaller than the inner diameter of the mating base 2, and the gap between the linear bearing body 1 and the mating base 2 can compensate for the possible shaft deviation to the maximum extent. Snap ring grooves 102 are respectively formed at both ends of the outer side of the bearing housing 101, and the snap ring grooves 102 are used for the fixation and limitation of the bearing housing 101 during assembly.

[0021] A U-shaped groove 111 is machined in the middle part of the inner side of the bearing housing 101, and a limiting hole 110 is formed at one place on the U-shaped groove 111. The limiting hole 110 penetrates through the side wall of the bearing housing 101.

[0022] The sliding film 106 is installed inside the bearing housing 101. A ring of convex limiting blocks 108 is provided in the middle part of the outer side of the sliding film 106. The position of the convex limiting blocks 108 corresponds to the position of the U-shaped groove 111 on the inner side of the bearing housing 101 for realizing the axial limitation of the sliding film 106. A positioning pin 107 is also provided in the middle part of the outer side of the sliding film 106. The position of the positioning pin 107 corresponds to the position of the limiting hole 110 on the bearing housing 101 for preventing the sliding film 106 from rotating. In this embodiment, the positioning pin 107 is arranged on one of the convex limiting blocks 108. The convex limiting blocks 108 and the positioning pin 107 can realize the rapid assembly of the sliding film 106 and the bearing housing 101. A plurality of auxiliary grooves 109 are formed on the inner side of the sliding film 106 for storing and discharging the dirt generated during the operation of the shaft. In this embodiment, the sliding film 106 is made of wear-resistant, self-lubricating and maintenance-free modified engineering plastics.

[0023] When the self-aligning linear bearing of the present utility model is in use: This linear bearing can compensate and align the errors related to parallelism through the design of its external shape structures such as the circular spherical surface structure 105, the O-ring 104, and the snap ring groove 102; the circular spherical surface structure 105 can realize the self-aligning function; the O-ring 104 makes the linear bearing body 1 form an elastic structure, so that the gap between the linear bearing body 1 and the mating base 2 can compensate for the possible shaft deviation to the maximum extent; the snap ring groove 102 is used for the fixation and limitation of the bearing housing during assembly; the sliding film 106 is made of wear-resistant, self-lubricating and maintenance-free modified engineering plastics, and the rapid assembly of the sliding film 106 and the bearing housing 101 is realized through the convex limiting blocks 108 and the positioning pin 107, and the dirt generated during the operation of the shaft is stored and discharged through the auxiliary grooves 109.

[0024] Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A self-aligning linear bearing, comprising a linear bearing body (1), characterized in that: The linear bearing body (1) comprises a bearing shell (101), a sliding membrane (106) and an O-ring (104); the middle part of the outer side of the bearing shell (101) is provided with a circular spherical structure (105); O-rings (104) are provided on both sides of the circular spherical structure (105); retaining ring grooves (102) are respectively provided at both ends of the outer side of the bearing shell (101); a U-shaped groove (111) and a limiting hole (110) are processed in the middle part of the inner side of the bearing shell (101); the sliding membrane (106) is installed inside the bearing shell (101); a plurality of protruding limiting blocks (108) are provided in the middle part of the outer side of the sliding membrane (106); the protruding limiting blocks (108) are opposite to the positions of the U-shaped grooves (111); a positioning pin (107) is also provided in the middle part of the outer side of the sliding membrane (106); the positioning pin (107) is opposite to the positions of the limiting hole (110).

2. The self-aligning linear bearing according to claim 1, characterized in that: U-shaped ring grooves (103) are arranged on both sides of the circular spherical structure (105) of the bearing housing (101), and O-rings (104) are installed in the U-shaped ring grooves (103).

3. The self-aligning linear bearing according to claim 1, characterized in that: The limiting hole (110) is formed on the U-shaped groove (111), and the limiting hole (110) passes through the side wall of the bearing housing (101).

4. The self-aligning linear bearing according to claim 1, characterized in that: The positioning pin (107) is arranged on one of the raised limiting blocks (108).

5. The self-aligning linear bearing according to claim 1, characterized in that: A plurality of auxiliary grooves (109) are formed on the inner side of the sliding film (106).

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