A mandrel bushing structure integrating a cellular heat sink and a positioning ring
By integrating a mandrel sleeve structure with a honeycomb heat dissipation groove and a positioning ring, the heat dissipation and connection stability problems of the mandrel sleeve are solved, achieving efficient heat dissipation and multi-dimensional positioning, and improving the stability and accuracy of the mechanical system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING YONGMING ELECTROMECHANICAL CO LTD
- Filing Date
- 2025-10-20
- Publication Date
- 2026-07-21
AI Technical Summary
Existing mandrel bushings have problems with insufficient heat dissipation and poor connection stability, which leads to frictional heat accumulation, deterioration of material properties, reduced positioning accuracy and equipment failure.
The design incorporates a mandrel bushing structure integrating honeycomb heat dissipation grooves and a positioning ring. The honeycomb heat dissipation grooves improve heat dissipation efficiency, while the positioning ring assembly enables multi-dimensional positioning. The structure is connected using interference fit and locking bolts.
It significantly improves heat dissipation performance, ensures stable equipment operation, reduces material performance degradation caused by frictional heat, enhances positioning stability, reduces component wear and vibration noise, and improves the precision and efficiency of the mechanical system.
Smart Images
Figure CN224533231U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of mechanical transmission technology, and more specifically, to a spindle bushing structure integrating a honeycomb heat dissipation groove and a positioning ring. Background Technology
[0002] In various mechanical transmission systems, the mandrel bushing, as a key component connecting the mandrel to the equipment base, plays a vital role in supporting, guiding, and reducing friction. It is widely used in high-precision, high-load applications such as motors, CNC machine tools, and aerospace equipment. Its performance directly affects the stability, accuracy, and service life of the entire mechanical system.
[0003] Currently, mandrels and bushings, as crucial components in mechanical transmission systems, are widely used in various mechanical equipment, playing a key role, especially in the processing of alloy mandrels and fan mandrels. However, in actual operation, mandrels and bushings face two prominent technical problems. Firstly, regarding insufficient heat dissipation, traditional structures, prioritizing strength and wear resistance, often employ smooth surfaces or simple groove designs, resulting in limited heat dissipation area. Under high-speed operation or heavy-load conditions, the heat generated by friction between the mandrel and bushing accumulates rapidly, leading to a decline in material properties (such as reduced hardness and decreased wear resistance), and causing thermal expansion, altering the fit clearance, and in severe cases, causing jamming or seizing failures, threatening system accuracy and safety. Secondly, regarding poor connection stability, traditional positioning methods rely on a single mating surface or simple protrusion, lacking effective constraints. Under vibration, impact, or load fluctuations, the mandrel and bushing are prone to axial or radial displacement, reducing positioning accuracy, accelerating component wear, causing additional vibration and noise, and shortening equipment lifespan. Utility Model Content
[0004] To overcome the above deficiencies, this application provides a mandrel bushing structure integrating a honeycomb heat dissipation groove and a positioning ring to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is as follows:
[0006] A mandrel bushing structure integrating a honeycomb heat dissipation groove and a positioning ring includes a connecting column and a plurality of teeth evenly spaced on the outer wall of the connecting column. The mandrel bushing is characterized in that: a mandrel assembly is integrally formed on the inner end of the connecting column; a bushing assembly is fitted on the outer wall of the mandrel assembly, and a limiting component is provided at the outer end; one end of the bushing assembly is interference-fitted with the inner end of the limiting component, and the other end is fitted with a positioning ring assembly, with a heat dissipation component provided on its outer wall; the inner ring of the positioning ring assembly is interference-fitted with the outer walls of the mandrel assembly and the bushing assembly.
[0007] Furthermore, the mandrel assembly consists of a mandrel post and a first concave ring. The two ends of the mandrel post are integrally formed with the opposite surfaces of the connecting post and the limiting assembly, respectively, and the outer wall is provided with the first concave ring and the bushing assembly is fitted on it.
[0008] Furthermore, the bushing assembly consists of a bushing sleeve and a second concave ring. The inner wall of the bushing sleeve is axially connected to the outer wall of the mandrel column, and the second concave ring is provided at one end of the outer wall.
[0009] Furthermore, the second concave ring on the outer wall of the bushing is located in the same direction as the first concave ring, and its inner end is interference-fitted with the limiting component, while its outer end is horizontally aligned with the inner sidewall of the second concave ring and is equipped with the positioning ring component.
[0010] Furthermore, the limiting component consists of a limiting disk, a limiting ring, and a limiting groove. The inner surface of the limiting disk is integrally formed with the outer end of the mandrel column, the outer wall of the limiting ring is integrally formed with the inner edge of the limiting disk, and the limiting groove is provided at one end of the bushing. The inside of the limiting groove is interference-fitted with the outer wall of the limiting ring.
[0011] Furthermore, the positioning ring assembly consists of a lower positioning ring, an upper positioning ring, a first protruding ring, a second protruding ring, and two sets of locking bolts. The inner walls of the lower positioning ring and the upper positioning ring are integrally formed with the first protruding ring and the second protruding ring, respectively, and fit against the outer wall of the mandrel column and the bushing. The outer wall of the first protruding ring is interference-fitted with the inner wall of the first concave ring, and the outer wall of the second protruding ring is interference-fitted with the inner wall of the second concave ring. The two sets of locking bolts are fixedly connected by connecting blocks at the connection between the lower positioning ring and the upper positioning ring.
[0012] Furthermore, the heat dissipation component consists of several honeycomb heat dissipation grooves and several heat dissipation concave rings, and the outer wall of the bushing is provided with several honeycomb heat dissipation grooves and several heat dissipation concave rings at equal intervals.
[0013] This utility model has the following beneficial effects:
[0014] 1. In terms of heat dissipation performance, this utility model features a honeycomb heat dissipation groove and a heat dissipation concave ring designed on the outer wall of the bushing assembly, forming a highly efficient composite heat dissipation structure. The honeycomb heat dissipation groove, with its dense perforated structure, significantly increases the contact area with air. Combined with the airflow guidance effect of the heat dissipation concave ring, it can quickly dissipate the frictional heat generated by the relative movement of the spindle and bushing, significantly reducing the internal temperature of the bushing. This design effectively avoids problems such as material performance degradation due to high temperatures and changes in fit clearance caused by thermal expansion, extending the service life of the components and ensuring the stable operation of the mechanical system.
[0015] 2. Regarding positioning stability, this invention utilizes a combination of lower and upper positioning rings in the positioning ring assembly to achieve dual constraint on both the mandrel and bushing assemblies. The first raised ring's interference fit with the first concave ring of the mandrel column, and the second raised ring's interference fit with the second concave ring of the bushing, form multi-dimensional positioning nodes, restricting the relative displacement of the mandrel and bushing both radially and axially. Simultaneously, the interference fit between the limiting ring and the limiting groove of the bushing in the limiting assembly further enhances the axial positioning effect. This multi-positioning design maintains precise relative positions even under vibration, impact, or load fluctuation conditions, reducing component wear and additional vibration noise, and improving the operational accuracy and efficiency of the mechanical system.
[0016] 3. Regarding structural rationality and ease of assembly, this utility model employs integrated molding or interference fit connections for each component, ensuring both the overall structural strength and rigidity while simplifying the assembly process. The positioning ring assembly utilizes locking bolts for quick assembly and disassembly, facilitating later maintenance and component replacement, thus reducing equipment maintenance costs. The toothed design on the outer wall of the connecting column enhances the stability of connections with external equipment, ensuring efficient power transmission. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the mandrel and bushing structure of the integrated honeycomb heat dissipation groove and positioning ring provided in the embodiments of this application;
[0019] Figure 2 A schematic diagram of the disassembly structure of the upper positioning ring provided in the embodiments of this application;
[0020] Figure 3 A schematic diagram of the connection structure between the bushing assembly and the limiting assembly provided in the embodiments of this application;
[0021] Figure 4 A schematic diagram of the connection structure of the connecting column and mandrel assembly and the limiting assembly provided in the embodiments of this application;
[0022] Figure 5 A schematic diagram of the positioning ring assembly structure provided in the embodiments of this application;
[0023] Figure 6 A schematic diagram of the lower positioning ring structure provided for an embodiment of this application.
[0024] In the diagram: 1-Connecting column; 2-Tooth; 3-Mandrel assembly; 4-Sleeve assembly; 5-Limiting assembly; 6-Positioning ring assembly; 7-Heat dissipation assembly; 31-Mandrel column; 32-First concave ring; 41-Sleeve; 42-Second concave ring; 51-Limiting disc; 52-Limiting ring; 53-Limiting groove; 61-Lower positioning ring; 62-Upper positioning ring; 63-First protruding ring; 64-Second protruding ring; 65-Locking bolt; 71-Honeycomb heat dissipation groove; 72-Heat dissipation concave ring. Detailed Implementation
[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0026] Example:
[0027] Please see Figure 1 , Figure 2 , Figure 4 A spindle bushing structure integrating a honeycomb heat dissipation groove and a positioning ring includes a connecting column 1 and a plurality of teeth 2 provided at equal intervals on the outer wall of the connecting column 1.
[0028] Among them, the connecting column 1 is the core load-bearing component that enables docking and cooperation with external mechanical structures. To ensure connection strength and structural stability, it is integrally machined with the mandrel column 31 using high-strength steel.
[0029] Among them, the teeth 2 evenly distributed along the circumference of the outer wall of the connecting column 1, through meshing with the external mechanical structure, greatly improve the tightness and stability of the connection. This tooth design can effectively increase the contact friction force, avoid relative sliding or axial misalignment during power transmission, ensure efficient and reliable force and motion transmission between the connecting column 1 and the external mechanical structure, and further enhance the connection accuracy and working stability of the overall structure.
[0030] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6A mandrel bushing structure integrating honeycomb heat dissipation grooves and positioning rings includes a mandrel assembly 3 integrally formed on the inner end of a connecting column 1, a bushing assembly 4 sleeved on the outer wall of the mandrel assembly 3, and a limiting assembly 5 at the outer end. One end of the bushing assembly 4 is interference-fitted with the inner end of the limiting assembly 5, and the other end is equipped with a positioning ring assembly 6, and a heat dissipation assembly 7 is provided on the outer wall. The inner ring of the positioning ring assembly 6 is interference-fitted with the outer walls of the mandrel assembly 3 and the bushing assembly 4. The mandrel assembly 3 is composed of a mandrel column 31 and a first concave ring 32. The bushing assembly 4 is composed of a bushing sleeve 41 and a second concave ring 42. The limiting assembly 5 is composed of a limiting disc 51, a limiting ring 52 and a limiting groove 53. The positioning ring assembly 6 is composed of a lower positioning ring 61, an upper positioning ring 62, a first protruding ring 63, a second protruding ring 64 and two sets of locking bolts 65. The heat dissipation assembly 7 is composed of a plurality of honeycomb heat dissipation grooves 71 and a plurality of heat dissipation concave rings 72.
[0031] The mandrel assembly 3, as the core transmission component connecting the connecting column 1 and the limiting assembly 5, is integrally formed from the mandrel column 31 and the first concave ring 32. It is made of steel and heat-treated to balance strength and toughness. The mandrel column 31 is slightly longer than the bushing 41 and has a scraped outer wall. It is axially connected to the inner wall of the bushing 41, allowing the mandrel column 31 to rotate more precisely within the bushing 41. The first concave ring 32 on the outer wall of the mandrel column 31 can cooperate with the second concave ring 42 and is positioned using the positioning ring assembly 6.
[0032] The bushing assembly 4, as the core component supporting and fixing the mandrel column 31, is made entirely of the same steel material as the mandrel column 31. The inner wall of the bushing 41 is press-fitted with the outer wall of the mandrel column 31, and both ends are precisely positioned with the mandrel column 31 via limiting components 5 and positioning ring assemblies 6, effectively limiting the position of the mandrel column 31 and facilitating its high-speed rotation. A second concave ring 42 on the outer wall of the bushing 41 works in conjunction with the first concave ring 32 to facilitate the installation of the positioning ring assembly 6.
[0033] The core function of the limiting component 5 is to axially limit the end of the mandrel 31, ensuring its stable confinement within the bushing 41, while providing rigid support for the precise rotation of the mandrel 31. The limiting disc 51, as the basic load-bearing component, is integrally forged to connect its inner center with the outer end of the mandrel 31. This seamless structural design fundamentally guarantees the connection strength and force transmission efficiency between the two. The limiting ring 52, like the limiting disc 51, is integrally machined. Its annular outer wall, after precision grinding, forms a tight interference fit with the limiting groove 53 on the inner wall of the outer end of the bushing 41. This fit not only restricts the axial movement of the bushing 41 through the elastic preload between the metals but also guides the bushing 41 to precisely fit into the mandrel 31 during assembly, ensuring surface contact between the outer end of the bushing 41 and the inner edge of the limiting disc 51. Through the above structural design, the limiting component 5 successfully completed the rigid limiting fit between the bushing 41 and the end of the spindle column 31, laying a stable structural foundation for the relative precision rotation of the two.
[0034] The core function of the positioning ring assembly 6 is to precisely position the other end of the mandrel 31, ensuring its stable constraint within the bushing 41 and providing a reliable guarantee for the smooth, high-speed rotation of the mandrel 31. The lower positioning ring 61 and the upper positioning ring 62 adopt a split-fit structure design, fastened together by locking bolts 65 to form a complete annular constraint. The first protruding ring 63 and the second protruding ring 64, integrally formed on their inner walls, precisely correspond to the first concave ring 32 of the mandrel 31 and the second concave ring 42 of the bushing 41, forming a tight interference fit. This double-fit interference fit structure, utilizing the elastic preload of the metal contact surface, can both strictly lock the relative position of the mandrel 31 and the bushing 41, eliminating wobbling caused by radial clearance, and disperse the radial load generated during high-speed rotation through the synergistic effect of the two sets of mating surfaces. This ensures that the mandrel 31 always maintains a stable state of axial alignment within the bushing 41, providing structural support for smooth operation and accuracy under high-speed rotation conditions.
[0035] Among them, the heat dissipation component 7 is the core structure for achieving efficient heat dissipation of the equipment, specifically designed to quickly remove the frictional heat generated by the high-speed operation of the mandrel and bushing. Several carefully arranged honeycomb heat dissipation grooves 71 and heat dissipation concave rings 72 on the outer wall of the bushing 41 form a synergistic heat dissipation effect through dual structural optimization: the honeycomb heat dissipation grooves 71, with their dense polyhedral porous structure, significantly reduce the local wall thickness, accelerating heat conduction from the inside of the bushing to the surface; while the surrounding heat dissipation concave rings 72 further expand the contact area with air, significantly improving heat exchange efficiency in conjunction with the airflow channels between the honeycomb grooves. This combined design, while ensuring the structural strength of the bushing, achieves efficient cooling of the bushing 41 through the dual effects of "drag reduction and heat transfer + surface expansion heat dissipation," providing a stable temperature environment for the long-term high-speed operation of the equipment.
[0036] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A mandrel bushing structure integrating a honeycomb heat dissipation groove and a positioning ring, comprising a connecting column (1) and a plurality of teeth (2) evenly spaced on the outer wall of the connecting column (1), characterized in that: The inner end of the connecting column (1) is integrally formed with a mandrel assembly (3). The outer wall of the mandrel assembly (3) is fitted with a bushing assembly (4), and the outer end is provided with a limiting assembly (5). One end of the bushing assembly (4) is interference-fitted with the inner end of the limiting assembly (5), and the other end is equipped with a positioning ring assembly (6). A heat dissipation assembly (7) is provided on the outer wall. The inner ring of the positioning ring assembly (6) is interference-fitted with the outer wall of the mandrel assembly (3) and the bushing assembly (4).
2. The mandrel sleeve structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 1, characterized in that, The mandrel assembly (3) consists of a mandrel post (31) and a first concave ring (32). The two ends of the mandrel post (31) are integrally formed with the opposite surfaces of the connecting post (1) and the limiting assembly (5), and the outer wall is provided with the first concave ring (32) and the bushing assembly (4) is fitted on it.
3. The mandrel bushing structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 2, characterized in that, The bushing assembly (4) consists of a bushing sleeve (41) and a second concave ring (42). The inner wall of the bushing sleeve (41) is axially connected to the outer wall of the mandrel column (31), and the second concave ring (42) is provided at one end of the outer wall.
4. The mandrel bushing structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 3, characterized in that, The second concave ring (42) on the outer wall of the bushing (41) is in the same direction as the first concave ring (32), and its inner end is press-fitted with the limiting component (5), and its outer end is horizontally aligned with the inner side wall of the second concave ring (42), and is equipped with the positioning ring component (6).
5. The mandrel sleeve structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 4, characterized in that, The limiting component (5) consists of a limiting disk (51), a limiting ring (52), and a limiting groove (53). The inner surface of the limiting disk (51) is integrally formed with the outer end of the mandrel column (31). The outer wall of the limiting ring (52) is integrally formed with the inner edge of the limiting disk (51). The bushing (41) has the limiting groove (53) at one end. The inside of the limiting groove (53) is interference-fitted with the outer wall of the limiting ring (52).
6. The mandrel sleeve structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 5, characterized in that, The positioning ring assembly (6) consists of a lower positioning ring (61), an upper positioning ring (62), a first protruding ring (63), a second protruding ring (64), and two sets of locking bolts (65). The lower positioning ring (61) and the upper positioning ring (62) are integrally formed with the first protruding ring (63) and the second protruding ring (64) on their inner walls, respectively, and are fitted to the outer walls of the mandrel column (31) and the bushing (41). The outer wall of the first protruding ring (63) is press-fitted with the inner wall of the first concave ring (32), and the outer wall of the second protruding ring (64) is press-fitted with the inner wall of the second concave ring (42). The two sets of locking bolts (65) are fixedly connected by connecting blocks at the connection between the lower positioning ring (61) and the upper positioning ring (62).
7. The mandrel bushing structure integrating honeycomb heat dissipation grooves and positioning rings according to claim 6, characterized in that, The heat dissipation assembly (7) consists of several honeycomb heat dissipation grooves (71) and several heat dissipation concave rings (72). The outer wall of the bushing (41) is provided with several honeycomb heat dissipation grooves (71) and several heat dissipation concave rings (72) at equal intervals.