High-precision anti-backlash linear bearing
By introducing a limit ring and a bidirectional threaded rod into the linear bearing, the vibration and noise problems caused by the increase in the gap after bearing wear are solved, and a high-precision and long-life bearing structure is achieved, simplifying the maintenance process.
Patent Information
- Application Number
- CN202423019655.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-12-09
AI Technical Summary
Existing linear bearings cannot eliminate gaps when worn, resulting in an increase in the inner diameter gap between the shaft and the bearing, causing vibration, noise and accuracy to decrease, affecting service life and operation of the entire machine parts, and the structure is fixed and not convenient for assembly and disassembly.
A high-precision clearance linear bearing is designed. By setting a limit ring and a bidirectional threaded rod in the limit groove, the clamping and fixing of the limit ring is achieved by using elastic connectors and threaded connections. The gap between the inner sleeve and the bearing is gradually contracted with wear, and the connection stability is ensured through fixing nuts. At the same time, the balls and sealing gaskets are arranged to improve maintenance efficiency and sealing.
Effectively eliminates the gap between the shaft and the bearing, reduces vibration and noise, improves linear accuracy and service life, simplifies the assembly and disassembly process, and improves maintenance efficiency and sealing.
Smart Images
Figure CN223294069U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of linear bearings, and in particular relates to a high-precision anti-backlash linear bearing. Background Art
[0002] Metal linear bearings are low-cost linear motion systems designed for use with cylindrical shafts with unlimited travel. They are widely used in sliding components of industrial machinery such as precision machine tools, textile machinery, food packaging machinery, and printing machinery. Because the load-bearing balls make point contact with the bearing outer casing, the balls roll with minimal friction. Linear bearings offer low friction and are relatively stable, independent of bearing speed. This allows for smooth linear motion with high sensitivity and precision. However, linear bearings do have limitations, primarily limited by their impact load capacity and poor load carrying capacity. Furthermore, they can produce high vibration and noise at high speeds.
[0003] When existing linear bearings wear out, their clearance cannot be eliminated, which increases the inner diameter clearance between the shaft and the bearing, causing vibration and noise during movement and even failure to guarantee linear accuracy, thereby shortening the service life and affecting the operating life of other components of the entire machine. In addition, the bearing structure is relatively fixed, which is not convenient for assembly and disassembly, thereby reducing maintenance efficiency. Utility Model Content
[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a high-precision anti-backlash linear bearing to solve the problem proposed in the above background technology that when the existing linear bearing is worn, its clearance cannot be eliminated, so that the inner diameter clearance between the shaft and the bearing increases, thereby causing vibration and noise during movement and even failing to ensure linear accuracy, thereby shortening the service life and affecting the operating life of other components of the whole machine. In addition, the bearing structure is relatively fixed, which is not convenient for assembly and disassembly, thereby reducing maintenance efficiency.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision anti-backlash linear bearing, comprising a bearing seat, a metal outer sleeve is arranged inside the bearing seat, an inner sleeve is fixedly connected to the inside of the metal outer sleeve, an adjustment gap is provided on one side of the metal outer sleeve and the inner sleeve, a circular fixed block is arranged inside the metal outer sleeve, a limiting groove is symmetrically arranged on one side of the bearing seat, a limiting ring is arranged inside the limiting groove, a connecting block is symmetrically fixedly connected to one side of the limiting ring, and a bidirectional threaded rod is threadedly connected to the inside of the connecting block.
[0006] Preferably, first fixing bolts are fixedly connected to the four corners of the upper end of the bearing seat.
[0007] Preferably, second fixing bolts are fixedly connected to the four corners inside the fixing block, and the second fixing bolts are fixedly connected to the metal jacket.
[0008] Preferably, balls are provided inside the fixing blocks.
[0009] Preferably, the outer side of the limiting ring is circular and fixedly connected with an elastic connecting piece, and the elastic connecting piece and the limiting groove are fixedly connected.
[0010] Preferably, the outer side of the bidirectional threaded rod is threadedly connected with a fixing nut.
[0011] Preferably, the bidirectional threaded rod and the bearing seat are rotationally connected.
[0012] Preferably, a circular sealing gasket is fixedly connected to the inner sleeve, and the sealing gasket and the fixing block are snap-fitted.
[0013] Compared with the existing technology, the utility model provides a high-precision anti-backlash linear bearing with the following beneficial effects:
[0014] 1. The utility model is provided with two limit rings installed inside the limit groove. The limit rings are connected to the limit groove by elastic connecting parts. The limit rings clamp and fix the metal outer sleeve and the inner sleeve. With long-term use, the inner sleeve and the shaft wear, which increases the inner diameter gap between the shaft and the bearing. By rotating the two-way threaded rod, the connecting block is threadedly connected to the two-way threaded rod, so that the distance between the two ends of the limit ring gradually becomes smaller, and the inner diameter of the limit ring becomes smaller, thereby continuing to shrink the metal outer sleeve and the inner sleeve, eliminating the gap between the shaft and the bearing, and solving the problem of increased inner diameter gap between the shaft and the bearing, which causes vibration and noise during movement and even cannot guarantee linear accuracy, thereby shortening the service life and affecting the operating life of other components of the whole machine. The operation is simple and quick, and the fixing nut limits the connecting block to ensure the stability of the connection and the better anti-backlash effect.
[0015] 2. The utility model sets a plurality of fixing blocks which are fixedly connected to the metal outer sleeve through a second fixing bolt. The ball is set inside the fixing block. The connection structure is simple, which facilitates the quick installation and removal of components such as the ball, thereby improving the maintenance efficiency of the bearing. The sealing gasket on the inner side of the inner sleeve is engaged with the fixing block, which increases the sealing environment inside the metal outer sleeve, avoids contamination of the bearing by the external environment, and improves the service life of the linear bearing.
[0016] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. The utility model has a scientific and reasonable structure, is safe and convenient to use, and provides great help to people. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0018] Figure 1 This is a schematic diagram of the axonometric structure of one side of a high-precision anti-backlash linear bearing proposed in the utility model;
[0019] Figure 2 This is a schematic diagram of the axonometric structure of the other side of a high-precision anti-backlash linear bearing proposed in the utility model;
[0020] Figure 3 This is a schematic side cross-sectional structural diagram of a high-precision anti-backlash linear bearing proposed in the utility model;
[0021] Figure 4 This is a schematic diagram of the limit groove structure of a high-precision anti-backlash linear bearing proposed by the utility model;
[0022] Figure 5 This is a schematic diagram of the limit ring structure of a high-precision anti-backlash linear bearing proposed by the utility model;
[0023] Figure 6 This is a schematic diagram of the metal outer sleeve structure of a high-precision anti-backlash linear bearing proposed in the utility model;
[0024] Figure 7 This is a schematic diagram of the fixed block structure of a high-precision anti-backlash linear bearing proposed by the utility model;
[0025] In the figure: bearing seat 1, first fixing bolt 2, metal outer sleeve 3, inner sleeve 4, adjustment gap 5, fixing block 6, second fixing bolt 7, ball 8, limiting groove 9, limiting ring 10, elastic connector 11, connecting block 12, bidirectional threaded rod 13, fixing nut 14, sealing gasket 15. DETAILED DESCRIPTION
[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0027] See also Figure 1-7The utility model provides a technical solution: a high-precision anti-backlash linear bearing, including a bearing seat 1, a metal outer sleeve 3 is provided inside the bearing seat 1, an inner sleeve 4 is fixedly connected inside the metal outer sleeve 3, an adjustment gap 5 is provided on one side of the inner sleeve 4, a circular fixed block 6 is provided inside the metal outer sleeve 3, a limiting groove 9 is symmetrically provided on one side of the inner side of the bearing seat 1, a limiting ring 10 is provided inside the limiting groove 9, a connecting block 12 is symmetrically fixedly connected on one side of the limiting ring 10, a bidirectional threaded rod 13 is threadedly connected to the connecting block 12, and the bidirectional threaded rod 13 is rotated by rotating the bidirectional threaded rod 13 The connecting block 12 is threadedly connected to the bidirectional threaded rod 13, so that the distance between the two ends of the limit ring 10 gradually becomes smaller, and the inner diameter of the limit ring 10 becomes smaller, thereby continuing to shrink the metal outer sleeve 3 and the inner sleeve 4, eliminating the gap between the shaft and the bearing, and solving the problem of increased inner diameter gap between the shaft and the bearing, which causes vibration and noise during movement and even cannot guarantee linear accuracy, thereby shortening the service life and affecting the service life of other parts of the whole machine. The operation is simple and quick, and the fixing nut 14 limits the connecting block 12 to ensure the stability of the connection and better anti-backlash effect.
[0028] In the present invention, preferably, first fixing bolts 2 are fixedly connected to the four corners of the upper end of the bearing seat 1 .
[0029] In the present invention, preferably, the four corners of the fixing block 6 are fixedly connected with second fixing bolts 7, and the second fixing bolts 7 and the metal sleeve 3 are fixedly connected. The connection structure is simple, which facilitates the rapid installation and disassembly of components such as the ball 8, thereby improving the bearing maintenance efficiency.
[0030] In the present invention, preferably, the fixing blocks 6 are each provided with a ball 8 inside.
[0031] In the present invention, preferably, the outer side of the limiting ring 10 is circular and fixedly connected with an elastic connecting piece 11 , and the elastic connecting piece 11 and the limiting groove 9 are fixedly connected.
[0032] In the present invention, preferably, the outer side of the bidirectional threaded rod 13 is threadedly connected with a fixing nut 14 .
[0033] In the present invention, preferably, the bidirectional threaded rod 13 and the bearing seat 1 are rotationally connected.
[0034] In the present invention, preferably, a circular sealing gasket 15 is fixedly connected to the interior of the inner sleeve 4, and the sealing gasket 15 and the fixed block 6 are snap-fitted to increase the sealing environment inside the metal outer sleeve 3, avoid contamination of the bearing by the external environment, and improve the service life of the linear bearing.
[0035] The working principle and use process of the utility model are as follows: when in use, first, multiple fixing blocks 6 are fixedly connected to the metal jacket 3 through the second fixing bolts 7, and the ball 8 is arranged inside the fixing block 6. The connection structure is simple, which is convenient for quickly installing and disassembling components such as the ball 8, thereby improving the maintenance efficiency of the bearing, and the sealing gasket 15 on the inner side of the inner sleeve 4 is snap-connected with the fixing block 6, which increases the sealing environment inside the metal jacket 3, avoids the pollution of the external environment to the bearing, and improves the service life of the linear bearing. Then the metal jacket 3 is snap-connected and installed inside the bearing seat 1, and the limiting ring 10 is connected to the limiting groove 9 through the elastic connecting piece 11. The limiting ring 10 clamps and fixes the metal jacket 3 and the inner sleeve 4. With long-term use The inner sleeve 4 and the shaft are worn, and the inner diameter clearance between the shaft and the bearing is increased. By rotating the two-way threaded rod 13, the connecting block 12 is threadedly connected to the two-way threaded rod 13 to achieve a gradual reduction in the distance between the two ends of the limit ring 10, and the inner diameter of the limit ring 10 becomes smaller, thereby continuing to shrink the metal outer sleeve 3 and the inner sleeve 4, eliminating the gap between the shaft and the bearing, and solving the problem of increased inner diameter clearance between the shaft and the bearing, which causes vibration and noise during movement and even inability to guarantee linear accuracy, thereby shortening the service life and affecting the operating life of other components of the whole machine. The operation is simple and quick, and the fixing nut 14 limits the connecting block 12 to ensure the stability of the connection and better anti-backlash effect.
[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A high-precision anti-backlash linear bearing, comprising a bearing seat (1), characterized in that: A metal outer sleeve (3) is provided inside the bearing seat (1), an inner sleeve (4) is fixedly connected inside the metal outer sleeve (3), an adjustment gap (5) is provided on one side of the metal outer sleeve (3) and the inner sleeve (4), a circular fixed block (6) is provided inside the metal outer sleeve (3), a limiting groove (9) is symmetrically provided on one side of the bearing seat (1), a limiting ring (10) is provided inside the limiting groove (9), a connecting block (12) is symmetrically fixedly connected on one side of the limiting ring (10), and a bidirectional threaded rod (13) is threadedly connected inside the connecting block (12).
2. A high-precision anti-backlash linear bearing according to claim 1, characterized in that: First fixing bolts (2) are fixedly connected to the four corners of the upper end of the bearing seat (1).
3. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: Second fixing bolts (7) are fixedly connected at the four corners inside the fixing block (6), and the second fixing bolts (7) and the metal jacket (3) are fixedly connected.
4. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: Balls (8) are provided inside the fixed blocks (6).
5. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: The outer side of the limiting ring (10) is circular and fixedly connected with an elastic connecting piece (11), and the elastic connecting piece (11) and the limiting groove (9) are fixedly connected.
6. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: The outer side of the bidirectional threaded rod (13) is threadedly connected with a fixing nut (14).
7. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: The bidirectional threaded rod (13) and the bearing seat (1) are rotationally connected.
8. The high-precision anti-backlash linear bearing according to claim 1, characterized in that: The inner sleeve (4) is circular and fixedly connected with a sealing gasket (15), and the sealing gasket (15) and the fixing block (6) are snap-fitted.