A nodular cast iron structure of a reducer bearing base
Patent Information
- Application Number
- CN202521777023.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-08-20
AI Technical Summary
由于内直角球铁铸件基座，采用简单直角过渡或单一筋板加固设计，难以有效疏导复杂力流，长期运行时，内角区域易因应力集中产生裂纹，导致基座刚性下降、传动精度受损，甚至引发减速机整体故障，影响设备稳定性与使用寿命，因此，针对上述问题提出一种减速机承载基座的球铁铸件结构
本实用新型中，通过设置的支撑框、主加固件、蜂窝加固件构成的内角加固机构，将90°内角集中荷载转化为多向分散力，解决应力集中难题，组合连接件可按需调整，适配不同荷载，有效避免内角应力集中产生裂纹，提升基座稳定性与使用寿命。
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Figure CN224786343U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of speed reducer technology, specifically to a ductile iron casting structure for a speed reducer bearing base. Background Technology
[0002] The ductile iron casting structure of the reducer bearing base is mainly used to support the core components of the reducer and bear the load and vibration during operation. It is made of ductile iron, which has both high strength and good toughness and can disperse the stress generated by the operation of the equipment. In speed reducer equipment, the bearing base is the core supporting component and must withstand complex loads such as torque and bending moment of the internal transmission components. In particular, for speed reducers with a right-angle layout (the output shaft and the input shaft are at a 90° angle), the inner corner area of the bearing base becomes a weak point in mechanical performance due to the concentration of force flow. Because the inner right-angle ductile iron casting base adopts a simple right-angle transition or a single stiffener reinforcement design, it is difficult to effectively guide complex force flow. During long-term operation, the inner corner area is prone to cracks due to stress concentration, which leads to a decrease in base rigidity, damage to transmission accuracy, and even cause overall gearbox failure, affecting equipment stability and service life. Therefore, in order to solve the above problems, a ductile iron casting structure for gearbox bearing base is proposed. Utility Model Content
[0003] The purpose of this utility model is to provide a ductile iron casting structure for a speed reducer bearing base to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: A ductile iron casting structure for a speed reducer bearing base includes an end cover. Two bearing base bodies are installed below the end cover and are fixed together by bolts. An inner corner reinforcement mechanism is fixed to the corner area inside the bearing base body. The inner corner reinforcement mechanism includes a support frame, a main reinforcement member is fixed to the inner side of the support frame, and a honeycomb reinforcement member arranged in a honeycomb pattern is fixed to the inner side of the main reinforcement member. A combined connector is installed on the inner side of the honeycomb reinforcement member. The combined connector includes a plug rod, a limit plate is fixed to the front end of the plug rod, a screw connection cavity is opened on the inner side of the plug rod, a positioning groove is opened in the middle of the rear end of the plug rod, and a positioning block is fixed to one side of the inner wall of the positioning groove.
[0005] As a further optimization of this utility model, the horizontal projection shape of the support frame is a right triangle, and each of the four corner areas of the support frame is fixed with a connecting seat, and a countersunk hole is provided at the center of the top of the connecting seat.
[0006] As a further optimization of this utility model, the end cap has an end cap connection hole on its inner side, and the supporting base body has a base connection hole at one end corresponding to the end cap. The position of the base connection hole corresponds to the position of the end cap connection hole, and the end cap connection hole and the base connection hole are fixed together by bolts.
[0007] As a further optimization of this utility model, the internal structure of the honeycomb reinforcement is a cavity structure, the lateral projection shape of the honeycomb reinforcement is a regular hexagon, the shape of the outer side of the main reinforcement matches the shape of the outer side of the honeycomb reinforcement, and the cross-section of the main reinforcement is half the cross-section of the honeycomb reinforcement.
[0008] As a further optimization of this utility model, the rear end face of the plug-in rod is a planar structure, the plug-in rod is inserted into the inner side of the honeycomb reinforcement, and the shape of the outer side of the plug-in rod is adapted to the shape of the inner side of the honeycomb reinforcement.
[0009] As a further optimization of this utility model, the lateral projected area of the limiting plate is the same as the lateral projected area of the honeycomb reinforcement, and the outer edge of the limiting plate is chamfered.
[0010] As a further optimization of this utility model, the shape of the positioning groove is adapted to the shape of the adapter cavity, and the inner side of the positioning block is provided with an adapter cavity for adapting the screw connection cavity. The adapter cavity is connected to the screw connection cavity, and every two corresponding screw connection cavities are fixedly connected by a screw.
[0011] Compared with the prior art, the beneficial effects of this utility model are: In this utility model, the inner corner reinforcement mechanism, which consists of a support frame, main reinforcement components, and honeycomb reinforcement components, transforms the concentrated load at the 90° inner corner into a multi-directional dispersed force, solving the problem of stress concentration. The combined connecting parts can be adjusted as needed to adapt to different loads, effectively preventing stress concentration at the inner corner from causing cracks and improving the stability and service life of the base. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a side view of the overall structure of this utility model; Figure 3 This is an exploded structural diagram of the entire utility model; Figure 4 This is a schematic diagram of the internal corner reinforcement mechanism of this utility model; Figure 5 This is a schematic diagram of the installation structure of the combined connector of this utility model; Figure 6This is a side view of the combined connector of this utility model.
[0013] In the diagram: 1. End cap; 2. Support base body; 3. Inner corner reinforcement mechanism; 31. Support frame; 32. Main reinforcement component; 33. Cellular reinforcement component; 34. Combined connector; 341. Insert rod; 342. Limiting plate; 343. Screw connection cavity; 344. Positioning groove; 345. Positioning block; 346. Adaptor cavity; 4. Connecting seat; 5. End cap connecting hole; 6. Base connecting hole. 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] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0016] Please see Figures 1-6 This utility model provides a technical solution: A ductile iron casting structure for a reducer bearing base includes an end cover 1. Two bearing base bodies 2 are installed below the end cover 1 and are fixed together by bolts. An inner corner reinforcement mechanism 3 is fixed to the inner corner of the bearing base body 2. The inner corner reinforcement mechanism 3 includes a support frame 31. A main reinforcement member 32 is fixed to the inner side of the support frame 31. A honeycomb reinforcement member 33 arranged in a honeycomb pattern is fixed to the inner side of the main reinforcement member 32. A combined connector 34 is installed on the inner side of the honeycomb reinforcement member 33. The combined connector 34 includes a plug rod 341. A limit plate 342 is fixed to the front end of the plug rod 341. A screw connection cavity 343 is opened on the inner side of the plug rod 341. A positioning groove 344 is opened in the middle of the rear end of the plug rod 341. A positioning block 345 is fixed to one side of the inner wall of the positioning groove 344.
[0017] Specifically, through the right-angled triangular structure of the support frame 31 and the synergy of the main reinforcement 32 and the honeycomb reinforcement 33, the concentrated load at the 90° inner angle is transformed into a multi-directional dispersed force, changing from "concentrated stress" to "layered and multi-directional guidance", solving the problem of stress concentration in traditional right-angle bases. The combined connector 34 can be inserted into the honeycomb reinforcement 33 as needed. By adjusting the number and density of insertions, it can adapt to different load requirements. When the load changes, there is no need to replace the entire base; only the combined connector 34 needs to be adjusted, reducing operation and maintenance costs. The precise cooperation of the positioning block 345 and the positioning groove 344 ensures the installation accuracy of the combined connector. As a further implementation of this solution, an end cap connection hole 5 is provided on the inner side of the end cap 1, and a base connection hole 6 is provided on the end of the bearing base body 2 corresponding to the end cap 1. The position of the base connection hole 6 corresponds to the position of the end cap connection hole 5. The end cap connection hole 5 and the base connection hole 6 are fixed together by bolts. The end cap connection hole 5 and the base connection hole 6 are precisely aligned. After the bolts are tightened, a closed protection system for the reducer is constructed. As a further implementation of this scheme, the horizontal projection shape of the support frame 31 is a right triangle. Each of the four corner areas of the support frame 31 is fixed with a connecting seat 4. A countersunk hole is opened at the center of the top of the connecting seat 4. The countersunk hole of the connecting seat 4 is compatible with various auxiliary components, such as welded reinforcing ribs or bolted support beams. The right triangle support frame 31 fits into the inner corner of the bearing base body 2 to form a "triangular dispersion" mechanical model, which divides the 90° concentrated force into multi-directional components and alleviates the stress peak. As a further implementation of this scheme, the interior of the honeycomb reinforcement 33 is a cavity structure, and the transverse projection shape of the honeycomb reinforcement 33 is a regular hexagon. The shape of the outer side of the main reinforcement 32 is adapted to the shape of the outer side of the honeycomb reinforcement 33. The cross-section of the main reinforcement 32 is half the cross-section of the honeycomb reinforcement 33. When the load is transferred, it is first decomposed into "surface stress" by the main reinforcement 32, and then transformed into "unit dispersed force" by the honeycomb reinforcement 33 with the honeycomb structure, so as to realize stress gradient attenuation. As a further implementation of this solution, the rear end face of the plug rod 341 is a planar structure. The plug rod 341 is inserted into the inner side of the honeycomb reinforcement 33. The shape of the outer side of the plug rod 341 is adapted to the shape of the inner side of the honeycomb reinforcement 33. The lateral projection area of the limiting plate 342 is the same as the lateral projection area of the honeycomb reinforcement 33. The edge of the outer side of the limiting plate 342 is chamfered to avoid scratches. The shape of the positioning groove 344 is adapted to the shape of the adapter cavity 346. The inner side of the positioning block 345 is provided with an adapter cavity 346 for adapting the screw connection cavity 343. The adapter cavity 346 is connected to the screw connection cavity 343. Each pair of corresponding screw connection cavities 343 are fixedly connected by a screw. Specifically, the limiting plate 342 and the outer side of the honeycomb reinforcement 33 form a "guide and limit" structure, which automatically corrects the angle when inserted; the positioning block 345 and the positioning groove 344 cooperate to ensure the coaxiality of the screw connection cavity 343 and avoid secondary stress caused by eccentric installation.
[0018] Workflow: The support frame 31, main reinforcement 32, and honeycomb reinforcement 33 of the inner corner reinforcement mechanism 3 are integrally formed ductile iron castings to ensure structural strength. The combined connector 34 is processed as needed to adapt to different load requirements. According to the design load of the reducer, the insertion position and quantity of the combined connector 34 are determined. When the load is large, the insertion density of the combined connector 34 in the honeycomb reinforcement 33 is increased. When the load is small, the number of installations is reduced, which is flexible and adaptable. The support frame 31 of the inner corner reinforcement mechanism 3 is connected to an auxiliary support component, such as a reinforcing rib, through the countersunk hole of the connecting seat 4 to strengthen the connection between the support frame 31 and the bearing base body 2. The right-angled triangular structure of the inclined surface of the support frame 31 is adapted to the inner corner of the bearing base body 2, and guides the force flow to be dispersed to the support frame 31 and the auxiliary component. The main reinforcement 32 and the honeycomb reinforcement 33 are integrally formed and embedded inside the support frame 31. The cross-section of the main reinforcement 32 is half that of the honeycomb reinforcement 33, which first disperses the concentrated stress at the inner corner. The honeycomb reinforcement 33 is distributed in a regular hexagonal honeycomb pattern, which further refines the force flow, transforms the concentrated load into a multi-directional dispersed force, and improves the crack resistance of the base. Insert the plug rod 341 of the combined connector 34 into the inside of the honeycomb reinforcement 33. The outside of the plug rod 341 is adapted to the regular hexagonal structure inside the honeycomb reinforcement 33 to ensure insertion stability. The limiting plate 342 fits against the outside of the honeycomb reinforcement 33 to limit the insertion depth and avoid over-insertion and damage to the structure. The positioning blocks 345 of adjacent combined connectors 34 are inserted into the corresponding positioning slots 344 to achieve precise alignment and ensure installation accuracy. Then, the adjacent combined connectors 34 are fastened by inserting screws into the screw connection cavity 343 to form a rigid connection, which strengthens the integrity of the inner corner reinforcement mechanism 3 and collaboratively disperses the inner corner load. The end cap 1 has an end cap connection hole 5 that is aligned with the base connection hole 6 of the bearing base body 2. They are fastened with bolts to form a complete bearing and protection structure for the reducer. The end cap 1 and the bearing base body 2 work together to enclose the inner corner reinforcement mechanism 3 inside, ensuring the stable operation of the reinforcement structure. When the reducer is running, loads such as torque and bending moment act on the inner corner of the bearing base body 2. The force flow is first initially dispersed through the support frame 31, and then through the honeycomb structure of the main reinforcement 32 and honeycomb reinforcement 33, the concentrated force is transformed into multi-directional dispersed force, which is further guided along the combined connector 34 and the external component of the connecting seat 4 to avoid stress concentration in the inner corner leading to cracks.
[0019] 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 ductile iron casting structure for a reducer bearing base, comprising an end cap (1), characterized in that: Two bearing base bodies (2) are installed below the end cap (1). The two bearing base bodies (2) are fixed together by bolts. An inner corner reinforcement mechanism (3) is fixed in the corner area inside the bearing base body (2). The inner corner reinforcement mechanism (3) includes a support frame (31), a main reinforcement member (32) is fixed on the inner side of the support frame (31), a honeycomb reinforcement member (33) arranged in a honeycomb pattern is fixed on the inner side of the main reinforcement member (32), and a combination connector (34) is installed on the inner side of the honeycomb reinforcement member (33). The combined connector (34) includes a plug rod (341), a limit plate (342) is fixed at the front end of the plug rod (341), a screw connection cavity (343) is opened on the inner side of the plug rod (341), a positioning groove (344) is opened in the middle of the rear end of the plug rod (341), and a positioning block (345) is fixed on one side of the inner wall of the positioning groove (344).
2. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The horizontal projection shape of the support frame (31) is a right triangle. Each of the four corner areas of the support frame (31) is fixed with a connecting seat (4). A countersunk hole is provided at the center of the top of the connecting seat (4).
3. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The end cap (1) has an end cap connection hole (5) on its inner side. The bearing base body (2) has a base connection hole (6) at one end corresponding to the end cap (1). The position of the base connection hole (6) corresponds to the position of the end cap connection hole (5). The end cap connection hole (5) and the base connection hole (6) are fixed together by bolts.
4. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The interior of the honeycomb reinforcement (33) is a cavity structure. The transverse projection shape of the honeycomb reinforcement (33) is a regular hexagon. The shape of the outer side of the main reinforcement (32) matches the shape of the outer side of the honeycomb reinforcement (33). The cross-section of the main reinforcement (32) is half the cross-section of the honeycomb reinforcement (33).
5. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The rear end face of the plug rod (341) is a planar structure. The plug rod (341) is inserted into the inner side of the honeycomb reinforcement (33). The shape of the outer side of the plug rod (341) is adapted to the shape of the inner side of the honeycomb reinforcement (33).
6. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The lateral projection area of the limiting plate (342) is the same as that of the honeycomb reinforcement (33), and the outer edge of the limiting plate (342) is chamfered.
7. The ductile iron casting structure for a reducer bearing base according to claim 1, characterized in that: The shape of the positioning groove (344) is adapted to the shape of the adapter cavity (346). The positioning block (345) has an adapter cavity (346) for adapting the screw connection cavity (343) on its inner side. The adapter cavity (346) is connected to the screw connection cavity (343). Each pair of corresponding screw connection cavities (343) are fixedly connected by a screw.