A sealing structure of a micro ball bushing guide assembly

Abstract

The utility model discloses a kind of sealing structure of micro ball bushing guide assembly, comprising: guide shaft, the outside of the guide shaft is equipped with retaining sleeve, the outside of the retaining sleeve is equipped with bearing sleeve;The utility model relates to ball bushing sealing technical field, the bearing sleeve, the combination structure of end sealing ring plus L type clamping slot plus inner hexagonal bolt is passed through, the double fixation of sealing ring is realized, clamping ring is embedded into slot, clamping block slides into L type clamping slot and forms preliminary positioning, inner hexagonal bolt further compresses sealing ring, ensure that sealing ring and guide shaft outer wall are closely attached, effectively block external dust, liquid from the invasion of two ends of component, when sealing ring appears abrasion due to long-term use, without disassembling entire guide assembly, only need to disassemble inner hexagonal bolt, clamping block is slid out from L type clamping slot, sealing ring can be removed, clean or replace.

Description

Technical Field

[0001] This utility model relates to the field of ball bushing sealing technology, specifically a sealing structure for a miniature ball bushing guide assembly. Background Technology

[0002] In the field of precision machinery, miniature ball bushing guide assemblies are widely used in automated instruments, medical devices, and small transmission equipment due to their low friction and high-precision guiding characteristics.

[0003] Traditional miniature ball bushing guide assemblies on the market generally have some shortcomings in sealing design. Most assemblies only use a single and fixed sealing structure. When the sealing components wear out and need to be replaced, the traditional structure often requires disassembling the entire guide assembly. This not only involves complicated operation steps, but also consumes a lot of manpower and time. It may also cause secondary damage to precision components such as steel balls and guide shafts during disassembly, resulting in a significant increase in maintenance costs and making it difficult to meet the equipment's demand for low-cost operation and maintenance. Utility Model Content

[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a sealing structure for a miniature ball bushing guide assembly, which solves the problem that most components use only a single and fixed sealing structure, resulting in complex maintenance.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: A sealing structure for a miniature ball bushing guide assembly includes: a guide shaft, a retaining sleeve fitted around the guide shaft, and a bearing sleeve fitted around the retaining sleeve; a slot is formed on the outer wall of the bearing sleeve, L-shaped grooves are symmetrically formed on the inner wall of the slot, a threaded hole is formed on the outer wall of the bearing sleeve, a sealing ring is provided at both ends of the bearing sleeve, a retaining ring is fixedly connected to the outer wall of the sealing ring, a retaining block is symmetrically fixedly connected to the outer wall of the retaining ring, an internal hexagon bolt is slidably connected to the inner wall of the sealing ring, and a threaded connecting ring is fixedly connected to the outer wall of the bearing sleeve.

[0006] Preferably, the outer wall of the retaining ring is slidably connected to the inner wall of the slot, the inner wall of the L-shaped slot is slidably connected to the outer wall of the retaining block, and the inner wall of the sealing ring is slidably connected to the outer wall of the guide shaft, directly blocking external dust and liquid from entering the interior from both ends of the component.

[0007] Preferably, the slots and threaded holes are located at both ends of the bearing sleeve. The threaded holes are arranged in a ring around the central point of the bearing sleeve. The inner wall of the threaded holes is threaded to the outer wall of the internal hexagon bolt, which further presses the sealing ring against the end of the bearing sleeve to prevent the sealing ring from loosening and causing sealing failure.

[0008] Preferably, the inner wall of the retaining sleeve is rotatably connected with a steel ball, and the two ends of the retaining sleeve are fixedly connected with sealing rings, which are respectively fixed to the outer ring and the inner ring of the retaining sleeve.

[0009] Preferably, the sealing ring of the outer ring of the retaining sleeve is slidably connected to the inner wall of the bearing sleeve, and the sealing ring of the inner ring of the retaining sleeve is slidably connected to the outer wall of the guide shaft. The steel balls are arranged in a ring array along the central point of the retaining sleeve, and the steel balls are arranged vertically along the inner wall of the retaining sleeve. The outer wall of the steel balls is slidably connected to the outer wall of the guide shaft and the inner wall of the bearing sleeve. The sealing ring of the outer ring of the retaining sleeve is slidably connected to the inner wall of the bearing sleeve, thus preventing foreign objects from entering through the gap between the retaining sleeve and the bearing sleeve. The sealing ring of the inner ring of the retaining sleeve is slidably connected to the outer wall of the guide shaft, thus preventing internal lubricating oil from leaking through the gap between the retaining sleeve and the guide shaft.

[0010] (III) Beneficial Effects This invention provides a sealing structure for a miniature ball bushing guide assembly. It offers the following advantages: (i) This bearing sleeve achieves double fixation of the sealing ring through a combination structure of end sealing ring, L-shaped groove, and internal hex bolt. The retaining ring is embedded in the slot, and the retaining block slides into the L-shaped groove to form initial positioning. The internal hex bolt further tightens the sealing ring to ensure that the sealing ring fits tightly against the outer wall of the guide shaft, effectively preventing external dust and liquid from entering from both ends of the component. The sealing ring adopts a detachable structure design. When the sealing ring wears due to long-term use, it is not necessary to disassemble the entire guide component. Only the internal hex bolt needs to be removed, and the retaining block can be slid out of the L-shaped groove to remove the sealing ring for cleaning or replacement. This simplifies the maintenance process and reduces maintenance time and labor costs.

[0011] (ii) The retaining sleeve, through the sliding contact between the outer ring seal and the inner wall of the bearing sleeve, and the sliding contact between the inner ring seal and the outer wall of the guide shaft, not only prevents foreign objects from entering through the gap between the retaining sleeve and the bearing sleeve, but also avoids internal lubricating oil from leaking through the gap between the retaining sleeve and the guide shaft. The double sealing defense greatly improves the dustproof and leakproof capabilities of the component and extends the service life of core components such as internal steel balls. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial cross-sectional structural diagram of the present invention; Figure 3 This is a schematic diagram of the bearing sleeve of this utility model; Figure 4 This utility model Figure 3 A schematic diagram of the structure at point A; Figure 5This is a schematic diagram of the structure of the retaining sleeve of this utility model.

[0013] In the diagram: 1. Guide shaft; 2. Retaining sleeve; 21. Steel ball; 22. Sealing ring; 3. Bearing sleeve; 31. Slot; 32. L-shaped groove; 33. Threaded hole; 34. Sealing ring; 35. Snap ring; 36. Snap block; 37. Socket head cap screw; 38. Threaded connecting ring. 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 sealing structure for a miniature ball bushing guide assembly, comprising: a guide shaft 1, a retaining sleeve 2 sleeved on the outside of the guide shaft 1, and a bearing sleeve 3 sleeved on the outside of the retaining sleeve 2; a slot 31 is provided on the outer wall of the bearing sleeve 3, L-shaped grooves 32 are symmetrically provided on the inner wall of the slot 31, a threaded hole 33 is provided on the outer wall of the bearing sleeve 3, a sealing ring 34 is provided at both ends of the bearing sleeve 3, a retaining ring 35 is fixedly connected to the outer wall of the sealing ring 34, a retaining block 36 is symmetrically fixedly connected to the outer wall of the retaining ring 35, an internal hexagon bolt 37 is slidably connected to the inner wall of the sealing ring 34, and a threaded connecting ring 38 is fixedly connected to the outer wall of the bearing sleeve 3.

[0016] The outer wall of the retaining ring 35 is slidably connected to the inner wall of the slot 31, the inner wall of the L-shaped slot 32 is slidably connected to the outer wall of the retaining block 36, and the inner wall of the sealing ring 34 is slidably connected to the outer wall of the guide shaft 1, directly blocking external dust and liquid from entering the interior from both ends of the component.

[0017] The slot 31 and threaded hole 33 are located at both ends of the bearing sleeve 3. The threaded hole 33 is arranged in a ring along the central point of the bearing sleeve 3. The inner wall of the threaded hole 33 is threaded to the outer wall of the internal hexagon bolt 37, which further presses the sealing ring 34 to the end of the bearing sleeve 3, preventing the sealing ring 34 from loosening and causing the seal to fail.

[0018] The inner wall of the retaining sleeve 2 is rotatably connected with a steel ball 21, and the two ends of the retaining sleeve 2 are fixedly connected with sealing rings 22, which are respectively fixed to the outer ring and the inner ring of the retaining sleeve 2.

[0019] The sealing ring 22 of the outer ring of retaining sleeve 2 is slidably connected to the inner wall of bearing sleeve 3, and the sealing ring 22 of the inner ring of retaining sleeve 2 is slidably connected to the outer wall of guide shaft 1. The steel balls 21 are arranged in a ring array along the axial center point of retaining sleeve 2, and the steel balls 21 are arranged vertically along the inner wall of retaining sleeve 2. The outer wall of the steel balls 21 is slidably connected to the outer wall of guide shaft 1 and the inner wall of bearing sleeve 3. The sealing ring 22 of the outer ring of retaining sleeve 2 is slidably connected to the inner wall of bearing sleeve 3, preventing foreign objects from entering through the gap between retaining sleeve 2 and bearing sleeve 3. The sealing ring 22 of the inner ring of retaining sleeve 2 is slidably connected to the outer wall of guide shaft 1, while preventing internal lubricating oil from leaking through the gap between retaining sleeve 2 and guide shaft 1.

[0020] In use, the threaded connecting ring 38 at the bottom of the bearing sleeve 3 is used to fix the entire ball bushing to the external equipment, maintain the steel balls 21 in the annular array on the inner wall of the sleeve 2, and slide in connection with the outer wall of the guide shaft 1 and the inner wall of the bearing sleeve 3. The sealing ring 34 slides against the outer wall of the guide shaft 1 through its inner wall, directly blocking external dust and liquid from entering the interior from both ends of the component. The retaining ring 35 on the outer wall of the sealing ring 34 is embedded in the slot 31 of the bearing sleeve 3, and the retaining block 36 slides into the L-shaped retaining groove 32 to initially fix the sealing ring 34, ensuring that the sealing ring 34 will not shift when it is fixed. Then, the hexagonal socket bolt 37 passes through the inner wall of the sealing ring 34 and is threadedly connected to the threaded hole 33 of the bearing sleeve 3, further pressing the sealing ring 34 against the end of the bearing sleeve 3 to prevent the sealing ring 34 from loosening and causing the seal to fail. When the sealing ring 34 is worn and needs to be replaced, after removing the internal hex bolt 37, the retaining block 36 of the sealing ring 34 can be slid out from the L-shaped retaining groove 32, and the sealing ring 34 can be removed for cleaning or replacement. There is no need to disassemble the entire component, which reduces maintenance costs. The sealing ring 22 of the outer ring of the retaining sleeve 2 is slidably connected to the inner wall of the bearing sleeve 3, preventing foreign objects from entering through the gap between the retaining sleeve 2 and the bearing sleeve 3. The sealing ring 22 of the inner ring of the retaining sleeve 2 is slidably connected to the outer wall of the guide shaft 1, while preventing internal lubricating oil from leaking through the gap between the retaining sleeve 2 and the guide shaft 1. The steel balls 21 are arranged in a ring array and vertically along the inner wall of the retaining sleeve 2, and slide in contact with the outer wall of the guide shaft 1 and the inner wall of the bearing sleeve 3 respectively. When the guide shaft 1 slides axially relative to the bearing sleeve 3, the steel balls 21 roll in the retaining sleeve 2, converting sliding friction into rolling friction, reducing motion resistance, and ensuring guiding stability through the uniform distribution of the steel balls 21.

[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 sealing structure for a miniature ball bushing guide assembly, comprising: A guide shaft (1) is provided with a retaining sleeve (2) on its outside, characterized in that a bearing sleeve (3) is provided on the outside of the retaining sleeve (2). The outer wall of the bearing sleeve (3) is provided with a slot (31), the inner wall of the slot (31) is symmetrically provided with L-shaped grooves (32), the outer wall of the bearing sleeve (3) is provided with a threaded hole (33), both ends of the bearing sleeve (3) are provided with sealing rings (34), the outer wall of the sealing ring (34) is fixedly connected with a retaining ring (35), the outer wall of the retaining ring (35) is symmetrically fixedly connected with a retaining block (36), the inner wall of the sealing ring (34) is slidably connected with an internal hexagon bolt (37), and the outer wall of the bearing sleeve (3) is fixedly connected with a threaded connecting ring (38).

2. The sealing structure of the miniature ball bushing guide assembly according to claim 1, characterized in that: The outer wall of the retaining ring (35) is slidably connected to the inner wall of the slot (31), the inner wall of the L-shaped slot (32) is slidably connected to the outer wall of the retaining block (36), and the inner wall of the sealing ring (34) is slidably connected to the outer wall of the guide shaft (1).

3. The sealing structure of the miniature ball bushing guide assembly according to claim 1, characterized in that: The slot (31) and threaded hole (33) are located at both ends of the bearing sleeve (3). The threaded hole (33) is arranged in a ring along the central point of the bearing sleeve (3). The inner wall of the threaded hole (33) is threadedly connected to the outer wall of the internal hexagon bolt (37).

4. The sealing structure of the miniature ball bushing guide assembly according to claim 1, characterized in that: The inner wall of the retaining sleeve (2) is rotatably connected with a steel ball (21), and the two ends of the retaining sleeve (2) are fixedly connected with sealing rings (22), and the sealing rings (22) are respectively fixed on the outer ring and the inner ring of the retaining sleeve (2).

5. The sealing structure of a miniature ball bushing guide assembly according to claim 4, characterized in that: The sealing ring (22) of the outer ring of the retaining sleeve (2) is slidably connected to the inner wall of the bearing sleeve (3), the sealing ring (22) of the inner ring of the retaining sleeve (2) is slidably connected to the outer wall of the guide shaft (1), the steel balls (21) are arranged in a ring along 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), and the outer wall of the steel balls (21) is slidably connected to the outer wall of the guide shaft (1) and the inner wall of the bearing sleeve (3).

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