Linear bearing sliding mechanism

Abstract

The application discloses a linear bearing sliding mechanism, which comprises a bearing guide shaft, two guide shaft support seats symmetrically arranged at two ends of the bearing guide shaft, and a self-adapting linear bearing assembly arranged outside the bearing guide shaft and between the two guide shaft support seats, wherein the self-adapting linear bearing assembly comprises a sliding inner sleeve and a sliding outer sleeve arranged outside the sliding inner sleeve, and the outside of the guide shaft support seat is provided with a self-adapting centering clamping assembly for locking bearing guide shafts with different diameters. By arranging the self-adapting linear bearing assembly and using the mode that high-pressure gas drives sliding balls to descend, the radial fitting position of the sliding balls can be automatically adjusted according to the outer diameter size of the bearing guide shaft, the compatibility and adaptability of the linear bearing to bearing guide shafts with different specifications are ensured, and the problem that the existing linear bearing must be frequently disassembled and replaced because the inner diameter and the outer diameter of the bearing guide shaft are uniquely matched is solved.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a linear bearing sliding mechanism. Background Technology

[0002] Linear bearings are fundamental mechanical components that enable linear reciprocating motion. Their core structure consists of an outer ring, rolling elements, and a cage. They utilize rolling friction instead of sliding friction to create a low-resistance, high-precision relative motion relationship between the shaft and the guide rail. These bearings are typically made of metal or engineering plastics and can incorporate steel balls, rollers, or needle rollers as rolling elements. They work in conjunction with precision-machined guide rail surfaces to form a kinematic pair, exhibiting characteristics such as low friction coefficient, high positioning accuracy, stable load capacity, and long service life. They are widely used in automation equipment, CNC machine tools, precision instruments, and industrial robots. As a key functional component of linear motion systems, linear bearings are often combined with guide rails, support seats, and connecting components to form linear bearing sliding mechanisms. These mechanisms, through optimized bearing arrangement, preload adjustment devices, and sealing protection structures, can further improve motion smoothness, load adaptability, and environmental tolerance, providing standardized solutions for mechanical systems.

[0003] When using existing linear bearing sliding mechanisms, the inner diameter parameter of the linear bearing and the outer diameter of the guide shaft have a unique matching relationship. When the operation involves switching between guide shafts of multiple specifications, technicians must completely disassemble the guide shaft and replace it with a linear bearing of the corresponding diameter. This complicates the equipment debugging process. In industrial scenarios where shaft diameter parameters change frequently, operators must repeatedly perform shutdown disassembly, precision calibration, and component replacement. This not only prolongs the equipment debugging cycle but also has a potential impact on the operational stability and transmission accuracy of the mechanical system due to the cumulative effect of assembly errors caused by repeated disassembly and assembly, increasing the technical complexity of production line maintenance. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a linear bearing sliding mechanism.

[0005] To solve the above-mentioned technical problems, the basic technical solution proposed by this invention is as follows:

[0006] A linear bearing sliding mechanism includes a bearing guide shaft, two guide shaft support seats symmetrically arranged at both ends of the bearing guide shaft, and an adaptive linear bearing assembly disposed outside the bearing guide shaft and between the two guide shaft support seats. The adaptive linear bearing assembly includes a sliding inner sleeve and a sliding outer sleeve disposed outside the sliding inner sleeve. An adaptive centering clamping assembly for locking bearing guide shafts of different diameters is disposed outside the guide shaft support seats.

[0007] Preferably, the sliding inner sleeve and the sliding outer sleeve are coaxial, and the outer wall of the sliding inner sleeve and the inner wall of the sliding outer sleeve are fitted with a clearance. The sliding inner sleeve has multiple horizontal key blocks arranged in a ring at equal intervals inside, and the upper surface of the horizontal key blocks has multiple high-pressure gas collection ports arranged at equal intervals. A movable plug push rod is provided inside the horizontal key blocks at each high-pressure gas collection port, and the movable plug push rod is slidably disposed with the horizontal key blocks. A pressure-applying movable plug is fixedly disposed at the middle of the top end of the movable plug push rod, and a ball bearing support shell is fixedly disposed at the middle of the bottom end of the movable plug push rod. A sliding ball is rotatably disposed inside the ball bearing support shell.

[0008] Preferably, the sliding outer shell has a hollow structure design, and the outer wall of the sliding outer shell is provided with a high-pressure gas inlet for gas to enter. A one-way valve is installed at the inlet end of the high-pressure gas inlet. The inner wall of the sliding outer shell is provided with a high-pressure gas outlet at each high-pressure gas gathering port position, and the bottom end of the high-pressure gas outlet is in contact with the top end of the high-pressure gas gathering port.

[0009] Preferably, each end of the sliding inner shell is provided with three shell fasteners arranged in a ring at equal intervals, and the sliding inner shell and the sliding outer shell are connected by the shell fasteners. Each end of the sliding inner shell is fixedly provided with an inner shell positioning guide rail at each shell fastener position, and each end of the sliding outer shell is fixedly provided with an outer shell positioning guide rail at each shell fastener position.

[0010] Preferably, the upper end face of the horizontal key block is an arc surface design consistent with the generatrix direction of the outer wall of the sliding inner sleeve, and the lower end face of the horizontal key block is an arc surface design consistent with the generatrix direction of the inner wall of the sliding inner sleeve. The plurality of high-pressure gas collection ports are arranged along the axial direction of the sliding inner sleeve, and the inner wall at the top of the high-pressure gas collection port is provided with an O-ring for sealing the joint.

[0011] Preferably, the adaptive centering clamping assembly includes a threaded sleeve detachably mounted on the outer wall of the guide shaft support and facing away from the bearing guide shaft. The threaded sleeve is positioned corresponding to the bearing guide shaft, and both ends of the bearing guide shaft extend into the two threaded sleeves respectively. The threaded sleeve has three lifting and pressing plates arranged in a ring at equal intervals inside. The lifting and pressing plates are slidably disposed with the threaded sleeve, and the top of the lifting and pressing plates is provided with an adaptive slope. The outer surface of the threaded sleeve is provided with a threaded collar through thread engagement.

[0012] Preferably, a rubber pad is fixedly provided at the bottom end of the lifting and pressing plate, the adapting slope is designed with an arc surface, two pressing plate correction blocks are fixedly provided at both ends of the lifting and pressing plate, and the pressing plate correction blocks and the threaded sleeve are elastically set by the pressing plate reset spring. Three collar handles arranged in a ring at equal intervals are fixedly installed on the outer wall of the threaded collar.

[0013] The beneficial effects of this invention are:

[0014] By setting up an adaptive linear bearing assembly, which uses high-pressure gas to drive the sliding balls to descend, the radial contact position of the sliding balls can be automatically adjusted according to the outer diameter of the bearing guide shaft. This ensures the compatibility of the linear bearing with guide shafts of various specifications and solves the problem that existing linear bearings must be frequently disassembled and replaced because their inner diameter and the outer diameter of the bearing guide shaft are uniquely matched. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the sliding inner shell and sliding outer shell structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the sliding outer shell of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the horizontal key block of the present invention;

[0019] Figure 5 This is a schematic diagram of the adaptive centering clamping component structure of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100. Adaptive linear bearing assembly; 101. Sliding inner sleeve; 102. Sliding outer sleeve; 103. Inner shell positioning guide rail; 104. Outer shell positioning guide rail; 105. Horizontal key block; 106. Sleeve fastener; 107. High-pressure gas outlet; 108. High-pressure gas collection port; 109. High-pressure gas inlet; 110. One-way valve; 111. Movable plug push rod; 112. O-ring seal; 113. Pressure-applying movable plug; 114. Ball bearing support shell; 115. Sliding ball; 200. Bearing guide shaft; 300. Adaptive centering clamping assembly; 301. Threaded sleeve; 302. Threaded collar; 303. Rubber pad; 304. Press plate return spring; 305. Press plate correction block; 306. Lifting press plate; 307. Adaptive slope; 308. Collar handle; 400. Guide shaft support seat. Detailed Implementation

[0022] The following will be combined with the appendix Figure 1 To be continued Figure 5 The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0023] The present invention provides a technical solution: a linear bearing sliding mechanism, including a bearing guide shaft 200, two guide shaft support seats 400 symmetrically arranged at both ends of the bearing guide shaft 200, and an adaptive linear bearing assembly 100 disposed outside the bearing guide shaft 200 and located between the two guide shaft support seats 400, wherein an adaptive centering clamping assembly 300 for locking bearing guide shafts 200 of different diameters is provided outside the guide shaft support seats 400.

[0024] Specifically, the adaptive linear bearing assembly 100 includes a sliding inner sleeve 101 and a sliding outer sleeve 102 disposed outside the sliding inner sleeve 101. The sliding inner sleeve 101 and the sliding outer sleeve 102 are coaxial. The outer wall of the sliding inner sleeve 101 and the inner wall of the sliding outer sleeve 102 are fitted with a clearance fit. Three sleeve fasteners 106 arranged in a ring at equal intervals are provided at both ends of the sliding inner sleeve 101. The sliding inner sleeve 101 and the sliding outer sleeve 102 are connected by the sleeve fasteners 106. An inner shell positioning guide rail 103 is fixedly provided at both ends of the sliding inner sleeve 101 at each sleeve fastener 106 position. An outer shell positioning guide rail is fixedly provided at both ends of the sliding outer sleeve 102 at each sleeve fastener 106 position. During installation, the inner shell positioning guide rail 103, the outer shell fastener 106, and the outer shell positioning guide rail 104 facilitate quick calibration of the sliding inner shell 101 and the sliding outer shell 102 by the operator, preventing misalignment. Multiple horizontal key blocks 105 arranged in a ring at equal intervals are detachably installed inside the sliding inner shell 101. The upper end face of the horizontal key block 105 is arc-shaped, consistent with the generatrix direction of the outer wall of the sliding inner shell 101, and the lower end face is arc-shaped, consistent with the generatrix direction of the inner wall of the sliding inner shell 101. Multiple high-pressure gas collection ports 108, arranged at equal intervals, are provided on the upper end face of the horizontal key block 105 to concentrate and store high-pressure gas within the horizontal key block 105. High-pressure gas collection ports 108 are arranged axially along the sliding inner sleeve 101. An O-ring 112 for sealing the joint is provided on the inner wall of the top of each high-pressure gas collection port 108. A movable plug push rod 111 is provided inside the horizontal key block 105 at each high-pressure gas collection port 108. The movable plug push rod 111 slides against the horizontal key block 105. A pressure-applying movable plug 113 is fixedly provided at the middle of the top of the movable plug push rod 111. Under continuous pressure from the high-pressure gas, the pressure-applying movable plug 113 can push the movable plug push rod 111 downwards. A ball bearing housing 114 is fixedly provided at the middle of the bottom of the movable plug push rod 111. A sliding ball 115 is rotatably arranged inside the ball bearing housing 114. During use, the ball 115 slides downwards... The movable push rod 111 pushes the ball bearing support shell 114 to move synchronously, and makes the sliding ball 115 fit tightly against the outer wall of the bearing guide shaft 200. The movable sliding ball 115 can adapt to bearing guide shafts 200 of different diameters. The sliding outer shell 102 has a hollow structure design, and its internal chamber is used to store high-pressure gas. The outer wall of the sliding outer shell 102 is provided with a high-pressure gas inlet 109 for gas entry. A one-way valve 110 is installed at the inlet end of the high-pressure gas inlet 109. The one-way valve 110 ensures that high-pressure gas enters the sliding outer shell 102 through the high-pressure gas inlet 109 and prevents high-pressure gas backflow. Furthermore, by pressing the valve core inside the one-way valve 110...It can quickly discharge high-pressure gas. A high-pressure gas outlet 107 is provided on the inner wall of the sliding outer casing 102 at each high-pressure gas collection port 108. The bottom end of the high-pressure gas outlet 107 is fitted against the top end of the high-pressure gas collection port 108 to ensure the flow of high-pressure gas.

[0025] Specifically, the adaptive centering clamping assembly 300 includes a threaded sleeve 301 detachably mounted on the outer wall of the guide shaft support 400 and facing away from one end of the bearing guide shaft 200. The threaded sleeve 301 corresponds to the bearing guide shaft 200, and both ends of the bearing guide shaft 200 extend into two threaded sleeves 301 respectively. Three lifting and pressing plates 306 arranged in a ring at equal intervals are provided inside the threaded sleeve 301 for pressing the bearing guide shaft 200. The lifting and pressing plates 306 are slidably mounted on the threaded sleeves 301. A rubber pad 303 is fixedly mounted at the bottom end of the lifting and pressing plates 306, which serves to protect the outer wall of the bearing guide shaft 200 and increase friction at the joint to reduce slippage. To mitigate the possibility of anomalies, the top of the lifting press plate 306 is provided with an adaptive slope 307, which is designed with an arc surface. Two press plate correction blocks 305 are fixedly installed at both ends of the lifting press plate 306 to provide guidance for the lifting press plate 306 during sliding. The press plate correction blocks 305 and the threaded sleeve 301 are elastically set through the press plate reset spring 304. The outer surface of the threaded sleeve 301 is provided with a threaded collar 302 through threaded engagement, which is used to synchronously merge the three lifting press plates 306 and clamp and fix the bearing guide shaft 200. Three collar handles 308 arranged in a ring at equal intervals are fixedly installed on the outer wall of the threaded collar 302 to facilitate the operator to rotate the threaded collar 302.

[0026] Based on the above, the present invention, by setting an adaptive linear bearing assembly 100, utilizes high-pressure gas to drive the sliding balls 115 to descend during use. This allows the radial contact position of the sliding balls 115 to be automatically adjusted according to the outer diameter of the bearing guide shaft 200, ensuring the compatibility of the linear bearing with guide shafts 200 of various specifications. This solves the problem of frequent disassembly and replacement required for existing linear bearings due to the unique matching between the inner diameter and the outer diameter of the bearing guide shaft 200. Furthermore, by setting an adaptive centering clamping assembly 300, the present invention utilizes the threaded engagement of the threaded collar 302 and the threaded sleeve 301, as well as the arc-shaped adaptive slope 307 design of the lifting press plate 306, to achieve rapid centering clamping of bearing guide shafts 200 of different diameters. This ensures the coaxiality consistency between the axis of the bearing guide shaft 200 and the guide shaft support 400, improving overall accuracy.

[0027] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A linear bearing sliding mechanism, comprising a bearing guide shaft (200), two guide shaft support seats (400) symmetrically arranged at both ends of the bearing guide shaft (200), and an adaptive linear bearing assembly (100) disposed outside the bearing guide shaft (200) and between the two guide shaft support seats (400), characterized in that: The adaptive linear bearing assembly (100) includes a sliding inner sleeve (101) and a sliding outer sleeve (102) disposed outside the sliding inner sleeve (101). The guide shaft support (400) is provided with an adaptive centering clamping assembly (300) for locking bearing guide shafts (200) of different diameters. The sliding inner shell (101) and the sliding outer shell (102) are coaxial, and the outer wall of the sliding inner shell (101) and the inner wall of the sliding outer shell (102) are fitted with a clearance. The sliding inner shell (101) is detachably installed with a plurality of horizontal key blocks (105) arranged in a ring at equal intervals. The upper end face of the horizontal key blocks (105) is provided with a plurality of high-pressure gas collection ports (108) arranged at equal intervals. The horizontal key blocks (105) are provided with a movable plug push rod (111) at each high-pressure gas collection port (108). The movable plug push rod (111) is slidably disposed with the horizontal key blocks (105). The middle of the top end of the movable plug push rod (111) is fixedly provided with a pressure-applying movable plug (113). The middle of the bottom end of the movable plug push rod (111) is fixedly provided with a ball bearing shell (114). The ball bearing shell (114) is rotatably disposed with a sliding ball (115). The sliding outer shell (102) has a hollow structure design, and the outer wall of the sliding outer shell (102) is provided with a high-pressure gas inlet (109) for gas to enter. A one-way valve (110) is installed at the inlet end of the high-pressure gas inlet (109). The inner wall of the sliding outer shell (102) is provided with a high-pressure gas outlet (107) at each high-pressure gas gathering port (108), and the bottom end of the high-pressure gas outlet (107) is in contact with the top end of the high-pressure gas gathering port (108).

2. The linear bearing sliding mechanism according to claim 1, characterized in that: The sliding inner shell (101) is provided with three shell fasteners (106) arranged in a ring at equal intervals at both ends, and the sliding inner shell (101) and the sliding outer shell (102) are connected by the shell fasteners (106). The inner shell positioning guide rail (103) is fixedly provided at both ends of the sliding inner shell (101) and at each shell fastener (106). The outer shell positioning guide rail (104) is fixedly provided at both ends of the sliding outer shell (102) and at each shell fastener (106).

3. The linear bearing sliding mechanism according to claim 1, characterized in that: The upper end face of the horizontal key block (105) is an arc surface design that is consistent with the generatrix direction of the outer wall of the sliding inner sleeve (101), and the lower end face of the horizontal key block (105) is an arc surface design that is consistent with the generatrix direction of the inner wall of the sliding inner sleeve (101). Multiple high-pressure gas gathering ports (108) are arranged along the axial direction of the sliding inner sleeve (101), and the inner wall of the top of the high-pressure gas gathering port (108) is provided with an O-ring (112) for sealing the joint.

4. The linear bearing sliding mechanism according to claim 1, characterized in that: The adaptive centering clamping assembly (300) includes a threaded sleeve (301) detachably mounted on the outer wall of the guide shaft support (400) and facing away from one end of the bearing guide shaft (200). The threaded sleeve (301) is positioned corresponding to the bearing guide shaft (200), and both ends of the bearing guide shaft (200) extend into the two threaded sleeves (301). The threaded sleeve (301) is provided with three lifting and pressing plates (306) arranged in a ring at equal intervals. The lifting and pressing plates (306) are slidably disposed with the threaded sleeve (301), and the top end of the lifting and pressing plates (306) is provided with an adaptive slope (307). The outer surface of the threaded sleeve (301) is provided with a threaded collar (302) by thread engagement.

5. A linear bearing sliding mechanism according to claim 4, characterized in that: A rubber pad (303) is fixedly installed at the bottom end of the lifting press plate (306). The adaptable slope (307) is designed with an arc surface. Two press plate correction blocks (305) are fixedly installed at both ends of the lifting press plate (306). The press plate correction blocks (305) and the threaded sleeve (301) are elastically set by the press plate reset spring (304). Three ring rotating handles (308) are fixedly installed on the outer wall of the threaded collar (302) and are arranged in a ring with equal spacing.

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