Self-aligning combined linear bearing

Abstract

The utility model relates to the technical field of bearings, and provides an automatic aligning combined linear bearing which comprises a fixing frame, a sliding film is arranged in an inner cavity of the fixing frame, sliding assemblies are symmetrically arranged on the outer surface of the fixing frame, each sliding assembly comprises a fixing block, a guide groove is formed in the outer side wall of each fixing block, and a sliding block is slidably connected to the middle of each guide groove. A plurality of clamping grooves are annularly formed in the surface of the sliding block, the clamping groove in one side is connected with the first outer barrel in a clamped mode through the first clamping block, and the clamping groove in the other side is connected with the second outer barrel in a clamped mode through the second clamping block. And the sliding block slides in the fixed block so as to drive the first outer cylinder and the second outer cylinder to perform floating adjustment to a certain degree, so that the flexibility and the automatic aligning capability of the bearing are improved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to an automatic self-aligning combined linear bearing. Background Art

[0002] The self-aligning combined linear bearing is a specially designed linear bearing. Its main feature is its self-aligning function. This function enables the bearing to automatically adjust with the position of the shaft when it undergoes relative linear motion with the shaft, thereby ensuring the coaxiality of the shaft and the bearing and achieving the purpose of flexible sliding between them.

[0003] For example, the publication number CN217873791U discloses an automatic self-aligning combined linear ceramic bearing, which includes a cylindrical retainer and a sliding film embedded in the retainer, the outer wall of the sliding film is provided with positioning ribs, the retainer includes two mutually fitting mounting tubes, the opposite ends of the two mounting tubes are provided with plug-in holes, inclined annular surfaces inclined away from the axis of the mounting tubes and embedded grooves running through the inner wall thereof, the two embedded grooves together form a receiving groove for the positioning ribs to be embedded, the same connecting rod is inserted into the two plug-in holes, and the two mounting tubes are provided with locking members for locking and fixing the connecting rod. This application can facilitate the installation of the sliding film and reduce the replacement cost of the retainer.

[0004] However, in the prior art, the linear bearing fixing frame, as an important component of the linear bearing system, is mainly used to fix and support the linear bearing to ensure its stability and accuracy during movement. However, the fixing frame and the outer cylinder in the current conventional linear bearing are often fixedly connected, which affects the flexibility and automatic self-aligning ability of the bearing, thereby limiting the practicality of the device to a certain extent. Utility Model Content

[0005] The utility model aims to solve the problem that the fixed frame and the outer cylinder in the conventional linear bearing in the prior art are often fixedly connected, which affects the flexibility and automatic self-aligning ability of the bearing.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an automatically aligning combined linear bearing, comprising a fixed frame, an inner cavity of the fixed frame is provided with a sliding film, an outer surface of the fixed frame is symmetrically provided with a sliding assembly, the sliding assembly comprises a fixed block, an outer side wall of the fixed block is provided with a guide groove, the middle part of the guide groove is slidably connected with a sliding block, a surface of the sliding block is provided with a plurality of grooves in an annular shape, the groove on one side is clamped with a first outer cylinder through a first clamping block, and the groove on the other side is clamped with a second outer cylinder through a second clamping block.

[0007] As a preferred embodiment, a fixing seat is fixedly connected to the outer surface of the fixing frame at the center of the two fixing blocks, a plurality of first positioning holes are opened in a ring shape on the upper surface of the fixing seat, and a plurality of second positioning holes are opened in a ring shape on the lower surface of the fixing seat.

[0008] As a preferred embodiment, a plurality of first support rods are fixedly connected to the lower surface of the first outer cylinder in an annular shape, and first through holes are formed on the surfaces of the plurality of first support rods.

[0009] As a preferred embodiment, a plurality of second support rods are fixedly connected to the upper surface of the first clamping block in an annular shape, and second through holes are formed on the surfaces of the plurality of second support rods.

[0010] As a preferred implementation, the second through hole and the first through hole are both located at the same horizontal plane.

[0011] As a preferred implementation, positioning pins are inserted in the middle of the first through hole and the second through hole.

[0012] As a preferred implementation, a positioning groove is provided on the surface of the fixing seat, and a sealing strip is sleeved inside the positioning groove.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] The utility model sets a sliding component to ensure that the fixed frame and the outer cylinder are in a floating state. When there is a tolerance between the ball and the linear bearing, the sliding block slides in the fixed block to respectively drive the first outer cylinder and the second outer cylinder to perform a certain degree of floating adjustment, thereby increasing the flexibility and automatic self-aligning ability of the bearing and improving the practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the automatic self-aligning combined linear bearing provided by the utility model;

[0016] Figure 2 A schematic diagram of the internal structure of the automatic self-aligning combined linear bearing provided by the utility model;

[0017] Figure 3 An exploded schematic diagram of the overall structure of the automatic self-aligning combined linear bearing provided by the utility model;

[0018] Figure 4 The utility model provides an exploded schematic diagram of the structure of the sliding component of the automatic self-aligning combined linear bearing.

[0019] Legend:

[0020] 1. Fixed frame; 2. Sliding membrane; 3. Fixed seat; 4. Positioning groove; 5. Fixed block; 6. Guide groove; 7. Sliding block; 8. Card slot; 9. First outer tube; 10. First card block; 11. First support rod; 12. First through hole; 13. Second outer tube; 14. Second card block; 15. Second support rod; 16. Second through hole; 17. Positioning pin; 18. Sealing strip. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: an automatic self-aligning combined linear bearing, including a fixed frame 1, an inner cavity of the fixed frame 1 is provided with a sliding film 2, the outer surface of the fixed frame 1 is symmetrically provided with a sliding assembly, the sliding assembly includes a fixed block 5, the outer side wall of the fixed block 5 is provided with a guide groove 6, the middle part of the guide groove 6 is slidably connected with a sliding block 7, the surface of the sliding block 7 is annularly provided with a plurality of grooves 8, one side of the groove 8 is clamped with the first outer cylinder 9 through the first clamping block 10, and the other side of the groove 8 is clamped with the second outer cylinder 13 through the second clamping block 14. When there is a tolerance between the ball and the linear bearing, the sliding block 7 slides in the fixed block 5, thereby driving the first outer cylinder 9 and the second outer cylinder 13 to perform a certain degree of floating adjustment, thereby increasing the flexibility and automatic self-aligning ability of the bearing and improving the practicality of the device.

[0023] like Figure 1-4As shown, the outer surface of the fixing frame 1 is fixedly connected with a fixing seat 3 at the center of the two fixing blocks 5, the upper surface of the fixing seat 3 is annularly provided with a plurality of first positioning holes, the lower surface of the fixing seat 3 is annularly provided with a plurality of second positioning holes, the lower surface of the first outer cylinder 9 is annularly fixedly connected with a plurality of first support rods 11, the surfaces of the plurality of first support rods 11 are all provided with first through holes 12, the upper surface of the first clamping block 10 is annularly fixedly connected with a plurality of second support rods 15, the surfaces of the plurality of second support rods 15 are all provided with second through holes 16, and the second through holes 16 are connected to the first through holes 12 They are all in the same horizontal plane. During assembly, the first clamping block 10 and the second clamping block 14 are respectively clamped into the clamping slot 8, and the first support rod 11 is inserted into the first positioning hole, and the second support rod 15 is inserted into the second positioning hole. At this time, the first through hole 12 and the second through hole 16 are in the same plane, and the positioning pin 17 is inserted into the first through hole 12 and the second through hole 16, so as to assemble and splice the first support rod 11 and the second support rod 15, so that the first outer cylinder 9 and the second outer cylinder 13 form a complete shell to protect the fixing frame 1. The overall assembly and disassembly method is relatively convenient and suitable for large-scale promotion.

[0024] like Figure 1-4 As shown, a positioning pin 17 is inserted in the middle of the first through hole 12 and the second through hole 16, a positioning groove 4 is opened on the surface of the fixing seat 3, and a sealing strip 18 is sleeved inside the positioning groove 4. The design of the positioning groove 4 is that after the positioning pin 17 is installed, the sealing strip 18 is sleeved in the positioning groove 4. At this time, the sealing strip 18 will apply an inward pressure to the positioning pin 17, and the positioning pin 17 is limited while ensuring the sealing, so as to avoid looseness between the first support rod 11 and the second support rod 15, which will affect the assembly and splicing effect of the first outer cylinder 9 and the second outer cylinder 13, and improve the overall safety of the device during operation.

[0025] Working principle: When in use, firstly, the first clamping block 10 and the second clamping block 14 are respectively clamped into the clamping slot 8, and the first support rod 11 is inserted into the first positioning hole, and the second support rod 15 is inserted into the second positioning hole. At this time, the first through hole 12 and the second through hole 16 are in the same plane, and the positioning pin 17 is inserted into the first through hole 12 and the second through hole 16. The first support rod 11 and the second support rod 15 are assembled and spliced, so that the first outer cylinder 9 and the second outer cylinder 13 form a complete shell to protect the fixed frame 1, and the sealing strip 18 is sleeved on the surface of the positioning groove 4 to limit the positioning pin 17. After long-term use, when the fixed frame is worn, it can be easily replaced, which is more convenient to use. When there is a tolerance between the ball and the linear bearing, the sliding block 7 slides in the fixed block 5, thereby driving the first outer cylinder 9 and the second outer cylinder 13 to perform a certain degree of floating adjustment, thereby eliminating the edge stress caused by manufacturing error, assembly error or optical axis deformation, and increasing the flexibility and automatic self-aligning ability of the bearing. The overall structure is simple, easy to operate, and suitable for large-scale promotion.

[0026] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An automatic self-aligning combined linear bearing, comprising a fixed frame (1), characterized in that: The inner cavity of the fixed frame (1) is provided with a sliding membrane (2), and the outer surface of the fixed frame (1) is symmetrically provided with a sliding component, and the sliding component includes a fixed block (5), the outer wall of the fixed block (5) is provided with a guide groove (6), the middle part of the guide groove (6) is slidably connected with a sliding block (7), and the surface of the sliding block (7) is provided with a plurality of grooves (8) in an annular shape, and the groove (8) on one side is connected to the first outer tube (9) through the first clamping block (10), and the groove (8) on the other side is connected to the second outer tube (13) through the second clamping block (14).

2. The self-aligning combined linear bearing according to claim 1, characterized in that: A fixing seat (3) is fixedly connected to the outer surface of the fixing frame (1) at the center of the two fixing blocks (5); a plurality of first positioning holes are opened in a ring shape on the upper surface of the fixing seat (3); and a plurality of second positioning holes are opened in a ring shape on the lower surface of the fixing seat (3).

3. The self-aligning combined linear bearing according to claim 1 is characterized in that: The lower surface of the first outer cylinder (9) is annularly fixedly connected to a plurality of first support rods (11), and the surfaces of the plurality of first support rods (11) are each provided with a first through hole (12).

4. The self-aligning combined linear bearing according to claim 1, characterized in that: The upper surface of the first clamping block (10) is annularly fixedly connected to a plurality of second support rods (15), and the surfaces of the plurality of second support rods (15) are each provided with a second through hole (16).

5. The self-aligning combined linear bearing according to claim 4 is characterized in that: The second through hole (16) and the first through hole (12) are both located on the same horizontal plane.

6. The self-aligning combined linear bearing according to claim 5, characterized in that: A positioning pin (17) is inserted in the middle of the first through hole (12) and the second through hole (16).

7. The self-aligning combined linear bearing according to claim 2, characterized in that: A positioning groove (4) is provided on the surface of the fixing seat (3), and a sealing strip (18) is sleeved inside the positioning groove (4).

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