A high-rigidity micro ball bushing guide assembly

Abstract

The utility model discloses a high rigidity miniature ball bushing guide assembly, include: bearing sleeve, the inside of bearing sleeve is provided with and keeps the sleeve, the inside of keeping the sleeve is provided with guide shaft, the utility model relates to ball bushing guide technical field, this guide shaft, through the strengthening groove of guide shaft inner wall helical annular array and the reinforcing rib fixed in the groove, form the helical framework of axle body inside, can effectively disperse the stress of radial load and torque generation, avoid guide shaft bending or torsion, ensure that the movement reference is stable, simultaneously, the hexagonal strengthening frame of axle center constitutes the center support structure, can even transfer axial pressure and impact load, solved the problem of insufficient rigidity of hollow axle body, while realizing lightweight design, significantly improve overall rigidity and carrying capacity.

Description

Technical Field

[0001] This utility model relates to the field of ball bushing guidance technology, specifically a high-rigidity miniature ball bushing guidance assembly. Background Technology

[0002] In high-end equipment fields such as industrial automation, precision testing, and semiconductor manufacturing, miniature ball bushing guide assemblies are core components for achieving high-precision linear motion. Their rigidity, motion accuracy, and service life directly determine the processing quality and operational stability of the equipment.

[0003] The design of guide shafts in current mainstream micro guide components generally faces the contradiction between rigidity and lightweight. To meet the requirements of equipment weight reduction, hollow shaft structures are widely used because they have a higher torsional moment of inertia than solid shafts of the same weight. However, the inherent internal void characteristics of hollow structures make them prone to stress concentration when subjected to radial loads and torques. Especially under high-frequency impact conditions, the problems of shaft bending and torsional deformation are prominent, which directly undermines the stability of motion reference. Utility Model Content

[0004] (a) Technical problems to be solved In view of the shortcomings of the existing technology, this utility model provides a high-rigidity miniature ball bushing guide assembly, which solves the contradiction between rigidity and lightweight that is commonly faced in guide shaft design.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A high-rigidity miniature ball bushing guide assembly includes: a bearing sleeve, a retaining sleeve disposed inside the bearing sleeve, and a guide shaft disposed inside the retaining sleeve; a reinforcing groove is formed on the inner wall of the guide shaft, a reinforcing hole is formed on the inner wall of the guide shaft, a reinforcing rib is fixedly connected to the inner wall of the reinforcing groove, and a reinforcing frame is fixedly connected to the inner wall of the reinforcing hole.

[0006] Preferably, the reinforcing groove is spiral-shaped along the inner wall of the guide shaft, and the reinforcing groove is arranged in a ring array at the central point of the guide shaft. The reinforcing ribs fixed in the groove are equivalent to forming a spiral skeleton inside the shaft. When the component is subjected to radial load or torque, the spiral reinforcing ribs can disperse the stress.

[0007] Preferably, the reinforcing frame is hexagonal and supported on the inner wall of the reinforcing hole, which is located at the center of the guide shaft. This structure can enhance the overall rigidity of the shaft from the inside. Especially when the guide bearing is subjected to axial pressure or impact load, the hexagonal structure can transmit force evenly and prevent the shaft from reducing its load-bearing capacity due to the hollow center, thus balancing lightweight and high rigidity.

[0008] Preferably, the inner wall of the retaining sleeve is rotatably connected to a steel ball, and the outer wall of the steel ball is slidably connected to the inner wall of the bearing sleeve and the outer wall of the guide shaft.

[0009] Preferably, the steel balls are arranged in a ring around the central point of the retaining sleeve, and the steel balls are arranged vertically along the inner wall of the retaining sleeve. When the external driving force drives the guide shaft to move, the steel balls roll along the contact surface between the two under the limitation of the retaining sleeve.

[0010] (III) Beneficial Effects This invention provides a high-rigidity miniature ball bushing guide assembly. It has the following advantages: (i) The guide shaft, through the spiral annular array of reinforcing grooves on the inner wall of the guide shaft and the reinforcing ribs fixed in the grooves, forms an internal spiral skeleton of the shaft body, which can effectively disperse the stress generated by radial load and torque, avoid bending or twisting of the guide shaft, and ensure the stability of the motion reference; at the same time, the hexagonal reinforcing structure at the shaft center forms a central support structure, which can uniformly transmit axial pressure and impact load, solve the problem of insufficient rigidity of hollow shaft body, and significantly improve the overall rigidity and load-bearing capacity while achieving lightweight design, adapting to the working conditions.

[0011] (ii) The retaining sleeve, through the rolling guide mechanism composed of steel balls, makes rolling contact with the inner wall of the bearing sleeve and the outer wall of the guide shaft through the ring array of vertically arranged steel balls, transforming traditional sliding friction into rolling friction, which greatly reduces motion resistance; at the same time, the orderly rolling of the steel balls under the limit of the retaining sleeve can reduce the offset and shaking during the movement, ensure the accuracy of relative motion, reduce component wear, and extend the service life of the component. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the retaining sleeve of this utility model; Figure 3 This is a schematic diagram of the structure of the guide shaft of this utility model; Figure 4 This is a schematic diagram of the reinforcing rib structure of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of the structure at point A.

[0013] In the diagram: 1. Bearing sleeve; 2. Retaining sleeve; 21. Steel ball; 3. Guide shaft; 31. Reinforcing groove; 32. Reinforcing hole; 33. Reinforcing rib; 34. Reinforcing frame. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figure 1-5 This utility model provides a technical solution: a high-rigidity miniature ball bushing guide assembly, comprising: a bearing sleeve 1, a retaining sleeve 2 disposed inside the bearing sleeve 1, and a guide shaft 3 disposed inside the retaining sleeve 2; a reinforcing groove 31 is provided on the inner wall of the guide shaft 3, a reinforcing hole 32 is provided on the inner wall of the guide shaft 3, a reinforcing rib 33 is fixedly connected to the inner wall of the reinforcing groove 31, and a reinforcing frame 34 is fixedly connected to the inner wall of the reinforcing hole 32.

[0016] The reinforcing groove 31 is spiral along the inner wall of the guide shaft 3, and the reinforcing groove 31 is arranged in a ring at the central point of the guide shaft 3. The reinforcing ribs 33 fixed in the groove are equivalent to forming a spiral skeleton inside the shaft. When the component is subjected to radial load or torque, the spiral reinforcing ribs 33 can disperse the stress.

[0017] The reinforcing frame 34 is hexagonal and supported on the inner wall of the reinforcing hole 32. The reinforcing hole 32 is located at the axis of the guide shaft 3. This structure can enhance the overall rigidity from the inside of the shaft. Especially when the guide shaft 3 is subjected to axial pressure or impact load, the hexagonal structure can transmit force evenly and prevent the shaft from reducing its load-bearing capacity due to the hollow center, thus balancing lightweight and high rigidity.

[0018] The inner wall of retaining sleeve 2 is rotatably connected to steel ball 21, and the outer wall of steel ball 21 is slidably connected to the inner wall of bearing sleeve 1 and the outer wall of guide shaft 3.

[0019] The steel balls 21 are arranged in a ring around the central point of the retaining sleeve 2, and the steel balls 21 are arranged vertically along the inner wall of the retaining sleeve 2. When the external driving force drives the guide shaft 3 to move, the steel balls 21 roll along the contact surface of the two under the limitation of the retaining sleeve 2.

[0020] When in use, the retaining sleeve 2 and the steel ball 21 form a rolling guide mechanism, which is the key to connecting the bearing sleeve 1 and the guide shaft 3 to achieve relative movement. During operation, it mainly reduces friction and ensures the accuracy of movement. The reinforcing groove 31 is spiral and arranged in a ring along the inner wall of the guide shaft 3. The reinforcing ribs 33 fixed in the groove are equivalent to forming a spiral skeleton inside the shaft. When the component is subjected to radial load or torque, the spiral reinforcing ribs 33 can disperse the stress, prevent the guide shaft 3 from bending or twisting, ensure that the shaft always maintains a straight shape, and provide a stable reference for movement. Inside the reinforcing hole 32 at the center of the guide shaft 3, a hexagonal reinforcing frame 34 forms a central support structure. This structure can enhance the overall rigidity from the inside of the shaft. Especially when the guide shaft 3 is subjected to axial pressure or impact load, the hexagonal structure can transmit force evenly and prevent the shaft from reducing its load-bearing capacity due to the hollow center, thus balancing lightweight and high rigidity. The steel balls 21 arranged in a ring array and vertically on the inner wall of the retaining sleeve 2 are in sliding contact with the inner wall of the bearing sleeve 1 and the outer wall of the guide shaft 3. When the external driving force drives the guide shaft 3 to move, the steel balls 21 roll along the contact surface of the two under the limitation of the retaining sleeve 2, which transforms the traditional "sliding friction" into "rolling friction", greatly reducing motion resistance and wear.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-rigidity miniature ball bushing guide assembly, comprising: A bearing sleeve (1) is provided with a retaining sleeve (2) inside the bearing sleeve (1). The retaining sleeve (2) is provided with a guide shaft (3) inside the retaining sleeve (2). The guide shaft (3) has a reinforcing groove (31) on its inner wall and a reinforcing hole (32) on its inner wall. A reinforcing rib (33) is fixedly connected to the inner wall of the reinforcing groove (31), and a reinforcing frame (34) is fixedly connected to the inner wall of the reinforcing hole (32).

2. The high-rigidity miniature ball bushing guide assembly according to claim 1, characterized in that: The reinforcing groove (31) is configured as a plurality of grooves, each of which extends spirally along the inner wall of the guide shaft (3), and the plurality of reinforcing grooves (31) are arranged in a ring array along the circumference of the guide shaft (3).

3. The high-rigidity miniature ball bushing guide assembly according to claim 1, characterized in that: The reinforcing frame (34) is hexagonal and supported on the inner wall of the reinforcing hole (32), which is located at the center of the guide shaft (3).

4. The high-rigidity miniature ball bushing guide assembly according to claim 1, characterized in that: The inner wall of the retaining sleeve (2) is rotatably connected to a steel ball (21), and the outer wall of the steel ball (21) is slidably connected to the inner wall of the bearing sleeve (1) and the outer wall of the guide shaft (3).

5. The high-rigidity miniature ball bushing guide assembly according to claim 4, characterized in that: The steel balls (21) are arranged in a ring around the central point of the retaining sleeve (2), and the steel balls (21) are arranged vertically along the inner wall of the retaining sleeve (2).

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