A bush seal mechanism
Patent Information
- Application Number
- CN202522525393.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-28
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-28
AI Technical Summary
首先，密封结构的设计可能较为简单，依赖于单一的橡胶环或静态密封件，难以适应轴在高速旋转或振动工况下的动态变化，容易产生间隙而导致润滑油泄漏，其次，许多传统密封机构在维护方面显得不够便捷，例如密封件往往嵌入在轴套或固定件深处，拆卸时需要先拆除多个连接部件，甚至借助专用工具，过程繁琐且耗时较长，为此，我们提出一种轴套密封机构
[0011]与现有技术相比，本实用新型的有益效果是：本轴套密封机构，具有以下好处：
Smart Images
Figure CN224886306U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of shaft sleeve sealing technology, specifically a shaft sleeve sealing mechanism. Background Technology
[0002] Bushings, as common mechanical transmission components, play a crucial role in industrial equipment. They are typically installed inside fixed support structures to enclose and support rotating connecting shafts, reducing friction, distributing loads, and preventing direct contact and wear between the shaft and fixed components. In many applications, lubricating oil or grease is injected into the bushing to further reduce friction and heat during operation, ensuring the smoothness and durability of the transmission system. Due to their simple structure and low cost, bushings are widely used in equipment such as fans, pumps, and conveying machinery, becoming a fundamental component for transmitting rotary motion. However, the sealing performance of the bushing directly affects the reliability of the entire system. Poor sealing can lead to lubricant loss, introduce external impurities, accelerate component wear, and even cause equipment failure.
[0003] Existing shaft sleeve sealing technologies often have some obvious shortcomings. First, the design of the sealing structure may be relatively simple, relying on a single rubber ring or static seal, which is difficult to adapt to the dynamic changes of the shaft under high-speed rotation or vibration conditions, and is prone to gaps leading to lubricating oil leakage. Second, many traditional sealing mechanisms are not convenient to maintain. For example, the seal is often embedded deep in the shaft sleeve or fixed part, and disassembly requires the removal of multiple connecting parts, or even the use of special tools, which is cumbersome and time-consuming. To address these issues, we propose a shaft sleeve sealing mechanism. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a bushing sealing mechanism that can achieve dynamic sealing and convenient maintenance through multiple sealing components and a detachable structure, and can effectively solve the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a bushing sealing mechanism, comprising a fixed tube and a first sealing assembly; Fixed tube: A mounting shell is fixed on the circumferential surface. A bushing is provided inside the fixed tube. A connecting shaft is provided inside the bushing. The bushing is connected to the connecting shaft by two bolts. A support assembly is fixed at the lower end of the surface of the fixed tube. A fixing assembly is installed at the upper end of the surface of the fixed tube. A second sealing assembly is installed inside the fixing assembly. The first sealing assembly includes a slip ring, a sealing ring, a first rubber ring, and a first spring. Two corresponding mounting grooves are formed at the upper and lower ends of the bushing. A slip ring is installed inside the mounting groove, and a first spring is fixed to the end face of the slip ring. A sealing ring is fixed to the other end of the first spring. A first annular groove is formed inside the sealing ring, and a first rubber ring is fixed inside the first annular groove. The slip ring, sealing ring, first rubber ring, and first spring are all fitted onto the circumferential surface of the connecting shaft. By using the first sealing assembly in conjunction with the second sealing assembly, lubricant leakage can be effectively prevented during use.
[0006] Furthermore, the fixing component includes a fixing cover and a second rubber ring. The upper end of the fixing tube surface is threaded with the fixing cover. The fixing cover has an opening in the middle. The connecting shaft is located inside the opening. The lower end of the fixing cover fits into the upper end of the bushing. The upper end of the inside of the fixing cover and the upper end of the bushing are both provided with a second annular groove. The second rubber ring is fixed inside the second annular groove. The bushing is fixed by setting the fixing component. When maintenance or replacement is required, the fixing cover can be rotated upward to separate from the fixing tube. After separation, the connecting shaft and bushing can be easily pulled out. Then, the two first sealing components can be quickly removed for maintenance and replacement.
[0007] Furthermore, the second sealing assembly includes a connecting ring, a third rubber ring, guide rods, and a second spring. The connecting ring is located inside the fixing cover and is sleeved on the circumferential surface of the connecting shaft. A third annular groove is formed inside the connecting ring, and a third rubber ring is fixed inside the third annular groove, fitting snugly against the surface of the connecting shaft. Four corresponding guide rods are fixed to the upper end of the connecting ring. Four corresponding guide grooves are formed at the upper end of the inside of the fixing cover, and the guide rods are slidably connected within their respective guide grooves. A second spring is fixed to the upper end of each guide rod and is also fixed within its corresponding guide groove. By configuring the second sealing assembly, the connecting ring will be firmly fitted against the upper sealing ring under the action of the four second springs during use, effectively preventing leakage.
[0008] Furthermore, the support assembly includes a support barrel and a fourth rubber ring. The support barrel is fixed to the lower end of the surface of the fixed tube. A support hole is opened in the middle of the support barrel. The connecting shaft is located inside the support hole. A fourth annular groove is opened inside the support hole. A fourth rubber ring is fixed inside the fourth annular groove. The fourth rubber ring is in contact with the surface of the connecting shaft. The support barrel is in contact with the lower end of the bushing. The bushing is supported by the support assembly.
[0009] Furthermore, four corresponding sliders are fixed on the circumferential surface of the sealing ring, and four corresponding sliding grooves are opened in the two mounting grooves at the upper and lower ends of the bushing. The sliders are slidably connected in the interior of the corresponding sliding grooves. The movement direction of the sealing ring is limited by setting the sliders and sliding grooves.
[0010] Furthermore, two corresponding limiting posts are fixed on the end face of the slip ring, and two corresponding limiting grooves are opened in the two mounting grooves at the upper and lower ends inside the bushing. The limiting posts are engaged in the corresponding limiting grooves, and the slip ring is limited by setting the limiting posts.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This bushing sealing mechanism has the following advantages: 1. The bushing sealing mechanism significantly improves the reliability and adaptability of the sealing effect by adopting the collaborative design of the first sealing component and the second sealing component. The sealing ring in the first sealing component always keeps in close contact with the connecting shaft under the action of the spring. Combined with the elastic deformation of the rubber ring, it can effectively compensate for the small displacement generated by the shaft during rotation or vibration, thereby preventing the leakage of lubricating oil. 2. The fixed components adopt a threaded connection, making disassembly and maintenance more convenient and efficient. When it is necessary to replace or repair the seal, simply unscrew the fixing cover to pull out the bushing and connecting shaft as a whole, without having to disassemble multiple complex parts, greatly simplifying the operation process. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the front structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.
[0013] In the diagram: 1. Fixed tube, 2. Bushing, 3. Connecting shaft, 4. First sealing assembly, 41. Slip ring, 42. Sealing moving ring, 43. First rubber ring, 44. First spring, 5. Fixed assembly, 51. Fixed cover, 52. Second rubber ring, 6. Second sealing assembly, 61. Connecting ring, 62. Third rubber ring, 63. Guide rod, 64. Second spring, 7. Support assembly, 71. Support barrel, 72. Fourth rubber ring, 8. Slider, 9. Slide groove, 10. Limiting post, 11. Bolt, 12. Mounting shell. 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 1-3 This embodiment provides a technical solution: a bushing sealing mechanism, including a fixed tube 1 and a first sealing component 4; Fixed tube 1: A mounting shell 12 is fixed on the circumferential surface. A bushing 2 is installed inside the fixed tube 1, and a connecting shaft 3 is installed inside the bushing 2. The bushing 2 is connected to the connecting shaft 3 by two bolts 11. A support assembly 7 is fixed to the lower end of the surface of the fixed tube 1. A fixing assembly 5 is installed at the upper end of the surface of the fixed tube 1. A second sealing assembly 6 is installed inside the fixing assembly 5. The fixing assembly 5 includes a fixing cover 51 and a second rubber ring 52. The fixing cover 51 is threaded to the upper end of the surface of the fixed tube 1. An opening is provided in the middle of the fixing cover 51, and the connecting shaft 3 is located inside the opening. The lower end of the fixing cover 51 is connected to the bushing. The upper ends of the two bushings 2 are fitted together. A second annular groove is provided inside the upper end of the fixing cover 51 and the upper end of the bushing 2. A second rubber ring 52 is fixed inside the second annular groove. The second sealing assembly 6 includes a connecting ring 61, a third rubber ring 62, a guide rod 63, and a second spring 64. A connecting ring 61 is provided inside the fixing cover 51. The connecting ring 61 is sleeved on the circumferential surface of the connecting shaft 3. A third annular groove is provided inside the connecting ring 61. A third rubber ring 62 is fixed inside the third annular groove. The third rubber ring 62 is fitted against the surface of the connecting shaft 3. Four corresponding guide rods are fixed to the upper end of the connecting ring 61. The upper end of the rod 63 and the fixed cover 51 has four corresponding guide grooves. The guide rod 63 is slidably connected to the inside of the corresponding guide groove. The upper end of the guide rod 63 is fixed with a second spring 64, which is also fixed inside the corresponding guide groove. The support assembly 7 includes a support barrel 71 and a fourth rubber ring 72. The lower end of the surface of the fixed tube 1 is fixed with the support barrel 71. The middle part of the support barrel 71 has a support hole. The connecting shaft 3 is located inside the support hole. The inside of the support hole has a fourth annular groove. The fourth rubber ring 72 is fixed inside the fourth annular groove. The fourth rubber ring 72 and the surface of the connecting shaft 3 are connected. The support barrel 71 is in close contact with the lower end of the bushing 2. The bushing 2 is supported by the support component 7. The second sealing component 6 is set so that the connecting ring 61 will be firmly attached to the upper sealing ring 42 under the action of four second springs 64 during use. In this way, leakage can be effectively avoided. The bushing 2 is fixed by the fixing component 5. When maintenance or replacement is required, the fixing cover 51 can be rotated upward to separate from the fixing tube 1. After separation, the connecting shaft 3 and the bushing 2 can be easily pulled out. Then, the two first sealing components 4 can be quickly removed for maintenance and replacement. The first sealing assembly 4 includes a slip ring 41, a sealing moving ring 42, a first rubber ring 43, and a first spring 44. The upper and lower ends of the bushing 2 have two corresponding mounting grooves. The slip ring 41 is installed inside the mounting groove. The first spring 44 is fixed on the end face of the slip ring 41. The sealing moving ring 42 is fixed on the other end of the first spring 44. The sealing moving ring 42 has a first annular groove inside. The first rubber ring 43 is fixed inside the first annular groove. The slip ring 41, the sealing moving ring 42, the first rubber ring 43, and the first spring 44 are all sleeved on the circumferential surface of the connecting shaft 3. By setting the first sealing assembly 4 in conjunction with the second sealing assembly 6, the leakage of lubricating oil during use can be effectively prevented.
[0016] Among them: four corresponding sliders 8 are fixed on the circumferential surface of the sealing ring 42, and four corresponding sliding grooves 9 are opened in the two mounting grooves at the upper and lower ends inside the bushing 2. The sliders 8 are slidably connected in the interior of the corresponding sliding grooves 9. The movement direction of the sealing ring 42 is limited by setting the sliders 8 and the sliding grooves 9.
[0017] Wherein: two corresponding limiting posts 10 are fixed on the end face of the slip ring 41, and two corresponding limiting grooves are opened in the two mounting grooves at the upper and lower ends inside the bushing 2. The limiting posts 10 are engaged in the corresponding limiting grooves, and the slip ring 41 is limited by setting the limiting posts 10.
[0018] The working principle of the bushing sealing mechanism provided by this utility model is as follows: The main body is supported by the fixed tube 1. The bushing 2 is equipped with a first sealing component 4, which includes a slip ring 41, a sealing moving ring 42, a first rubber ring 43 and a first spring 44. When the connecting shaft 3 rotates, the first spring 44 continuously applies pressure to push the sealing moving ring 42 to move axially, so that the first rubber ring 43 tightly fits the surface of the connecting shaft 3 to form a dynamic sealing interface to prevent lubricating oil leakage. At the same time, the sealing moving ring 42 slides in the sliding groove 9 inside the bushing 2 through the slider 8 on the circumferential surface to ensure stable movement direction, while the slip ring 41 is locked in the limiting groove of the mounting groove by the limiting post 10 to prevent rotational deviation. The fixing component 5 is threaded to the upper end of the fixing tube 1 via the fixing cover 51. It integrates the second sealing component 6, which includes a connecting ring 61, a third rubber ring 62, a guide rod 63, and a second spring 64. The second spring 64 pushes the connecting ring 61 downward through the guide rod 63, so that the third rubber ring 62 fits against the surface of the connecting shaft 3, providing auxiliary sealing and forming a double sealing barrier with the upper sealing ring 42. The support component 7 is located at the lower end of the fixing tube 1 and includes a support barrel 71 and a fourth rubber ring 72, which provides bottom support for the bushing 2. The fourth rubber ring 72 further seals the gap between the connecting shaft 3 and the support hole. When maintenance is required, the fixing cover 51 can be unscrewed to easily pull out the connecting shaft 3 and the bushing 2, facilitating quick disassembly of the first sealing component 4 for replacement or maintenance.
[0019] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A bushing sealing mechanism, characterized in that: Includes a fixed tube (1) and a first sealing assembly (4); Fixed tube (1): A mounting shell (12) is fixed on the circumferential surface. A bushing (2) is provided inside the fixed tube (1). A connecting shaft (3) is provided inside the bushing (2). The bushing (2) is connected to the connecting shaft (3) by two bolts (11). A support component (7) is fixed at the lower end of the surface of the fixed tube (1). A fixing component (5) is installed at the upper end of the surface of the fixed tube (1). A second sealing component (6) is installed inside the fixing component (5). First sealing assembly (4): includes slip ring (41), sealing moving ring (42), first rubber ring (43) and first spring (44). The upper and lower ends of the bushing (2) are provided with two corresponding mounting grooves. The mounting groove is provided with slip ring (41). The first spring (44) is fixed on the end face of slip ring (41). The other end of the first spring (44) is fixed with sealing moving ring (42). The sealing moving ring (42) is provided with a first annular groove. The first rubber ring (43) is fixed in the first annular groove. The slip ring (41), sealing moving ring (42), first rubber ring (43) and first spring (44) are all sleeved on the circumferential surface of connecting shaft (3).
2. The bushing sealing mechanism according to claim 1, characterized in that: The fixing component (5) includes a fixing cover (51) and a second rubber ring (52). The upper end of the surface of the fixing tube (1) is threaded with the fixing cover (51). The fixing cover (51) has an opening in the middle. The connecting shaft (3) is located inside the opening. The lower end of the fixing cover (51) is in contact with the upper end of the bushing (2). The upper end of the inside of the fixing cover (51) and the upper end of the bushing (2) are both provided with a second annular groove. The second rubber ring (52) is fixed inside the second annular groove.
3. The bushing sealing mechanism according to claim 2, characterized in that: The second sealing assembly (6) includes a connecting ring (61), a third rubber ring (62), a guide rod (63), and a second spring (64). The connecting ring (61) is provided inside the fixing cover (51). The connecting ring (61) is sleeved on the circumferential surface of the connecting shaft (3). A third annular groove is provided inside the connecting ring (61). A third rubber ring (62) is fixed inside the third annular groove. The third rubber ring (62) is in contact with the surface of the connecting shaft (3). Four corresponding guide rods (63) are fixed at the upper end of the connecting ring (61). Four corresponding guide grooves are provided at the upper end of the inside of the fixing cover (51). The guide rods (63) are slidably connected inside the corresponding guide grooves. A second spring (64) is fixed at the upper end of the guide rods (63). The second spring (64) is fixed inside the corresponding guide groove.
4. The bushing sealing mechanism according to claim 1, characterized in that: The support assembly (7) includes a support barrel (71) and a fourth rubber ring (72). The support barrel (71) is fixed at the lower end of the surface of the fixed tube (1). A support hole is provided in the middle of the support barrel (71). The connecting shaft (3) is located inside the support hole. A fourth annular groove is provided inside the support hole. A fourth rubber ring (72) is fixed inside the fourth annular groove. The fourth rubber ring (72) is in contact with the surface of the connecting shaft (3). The support barrel (71) is in contact with the lower end of the bushing (2).
5. The bushing sealing mechanism according to claim 1, characterized in that: Four corresponding sliders (8) are fixed on the circumferential surface of the sealing ring (42). The two mounting slots at the upper and lower ends of the bushing (2) are each provided with four corresponding sliding grooves (9). The sliders (8) are slidably connected to the inside of the corresponding sliding grooves (9).
6. A bushing sealing mechanism according to claim 1, characterized in that: Two corresponding limiting posts (10) are fixed on the end face of the slip ring (41). Two corresponding limiting grooves are opened in the two mounting grooves at the upper and lower ends of the bushing (2). The limiting posts (10) are engaged in the corresponding limiting grooves.