A vertical shaft bearing housing for a sand making machine
By using a micro-interference fit with a mesh groove and boss design in the vertical shaft bearing housing of the sand making machine, the problems of poor oil film stability and fatigue failure are solved, thereby improving lubrication stability and manufacturing efficiency and extending the service life of the bearing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI XIONGHOU MASCH MFG CO LTD
- Filing Date
- 2025-10-27
- Publication Date
- 2026-07-17
Smart Images
Figure CN224515700U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of mining machinery parts, and in particular to a vertical shaft bearing seat for a sand making machine. Background Technology
[0002] As a core mechanical component of crushing equipment, the reliability of the vertical shaft bearing housing of a sand making machine directly determines the overall operating efficiency and service life of the machine. Currently, the industry commonly uses integral interference fit or clearance fit designs to assemble vertical shaft bearings. This structure requires the bearing housing to have both high-precision positioning capabilities and good thermal deformation compensation performance.
[0003] However, in actual operation, when the bearing and bearing bore are fitted with a clearance fit, the stability of the lubricating oil film is easily reduced under continuous vibration conditions, which in turn leads to oil film rupture and local dry friction. This not only significantly reduces the bearing's load-bearing capacity, but also accelerates fatigue damage to the rolling contact surface, ultimately leading to premature bearing failure. Utility Model Content
[0004] Therefore, it is necessary to provide a sand making machine vertical shaft bearing housing to address the problems of poor oil film stability and fatigue failure caused by clearance fit in the operation of the sand making machine.
[0005] A vertical shaft bearing seat for a sand making machine includes: a seat body, an inner hole at one side end of the seat body, two elongated holes on the upper surface of the seat body, the two elongated holes being symmetrically distributed on both sides of the inner hole, a grid groove on the surface of the inner hole, and a boss set inside the grid groove on the inner side of the seat body, the bosses being distributed in a matrix.
[0006] In one embodiment, the depth of the mesh groove is X, where 0.1mm ≤ X ≤ 0.3mm.
[0007] In one embodiment, the area of the boss is S, where 1mm²≤S≤3mm².
[0008] In one embodiment, the cross-sectional shape of the grid groove is an isosceles triangle, and the maximum width of the cross-section of the grid groove is W, where 0.1mm≤W≤0.3mm.
[0009] In one embodiment, the inner gaps of the grid groove and the shape of the boss are both matched squares.
[0010] In one embodiment, the inner gap of the mesh groove and the shape of the boss are both matching concave quadrilaterals.
[0011] In one embodiment, an oil injection nozzle is fixedly connected to the top of the base, and the bottom of the oil injection nozzle penetrates the base and communicates with the mesh groove.
[0012] In one embodiment, the surface of the oil nozzle is threadedly connected to a threaded sealing cap.
[0013] Beneficial effects The aforementioned vertical shaft bearing housing of the sand making machine forms discrete contact points to disperse bearing stress through the matching design of the grid groove and boss in the inner hole of the housing, while retaining the oil storage gap; when thermally expanded, the elastic deformation of the boss can stabilize the oil film thickness and prevent the bearing from seizing; the spiral grid groove further optimizes the lubrication guidance, reduces frictional resistance, and extends the lubrication cycle; The base made of QT500-7 ductile iron has both high strength and shock absorption performance, which can withstand the impact load of the sand making machine and reduce noise; the grid groove and boss square or spiral design simplifies the processing process, improves manufacturing efficiency, and the concave quadrilateral structure has stronger resistance to foreign object jamming. Attached Figure Description To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0014] Figure 1 This is a schematic diagram of the vertical shaft bearing seat structure of the sand making machine using a square grid groove according to this utility model; Figure 2 This is a cross-sectional schematic diagram of the vertical shaft bearing seat of the sand making machine using a square grid groove according to this utility model; Figure 3 This is a schematic diagram of the vertical shaft bearing seat structure of a sand making machine with a concave quadrilateral grid groove according to this utility model; Figure 4 This is a cross-sectional schematic diagram of the vertical shaft bearing seat of a sand making machine that uses a concave quadrilateral grid groove according to this utility model.
[0015] Figure label: 100, base; 110, inner hole; 120, elongated hole; 130, mesh groove; 200, boss; 300, oil nozzle; 400, threaded sealing cap. Detailed Implementation
[0016] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0017] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.
[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0019] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0020] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.
[0021] The following is combined Figures 1-4 This utility model describes the vertical shaft bearing housing of a sand making machine.
[0022] Example 1, such as Figure 1 and Figure 2 As shown, a vertical shaft bearing housing for a sand making machine includes: a housing body 100, an inner hole 110 formed at the side end of the housing body 100, two elongated holes 120 formed on the upper surface of the housing body 100, the two elongated holes 120 being symmetrically distributed on both sides of the inner hole 110, a grid groove 130 formed on the surface of the inner hole 110, and a boss 200 formed on the inner side of the housing body 100, which is arranged in a matrix. The housing body 100 is preferably made of QT500-7 ductile iron. QT500-7 ductile iron has high strength and high toughness, which can withstand large loads and impacts, while maintaining good wear resistance to extend service life. This material has good casting performance, which can form bearing housings with complex structures, and its vibration damping performance helps to reduce vibration and noise during equipment operation. In addition, QT500-7 ductile iron has good machinability, which is convenient for subsequent machining and assembly, and the cost is relatively low, resulting in a high cost-performance ratio.
[0023] The depth of the mesh groove 130 is X, where 0.1mm≤X≤0.3mm, and the height of the boss 200 is H, where H=X.
[0024] The area of the boss 200 is S, where 1mm²≤S≤3mm².
[0025] The cross-sectional shape of the mesh groove 130 is an isosceles triangle, and the maximum width of the cross-section of the mesh groove 130 is W, where 0.1mm≤W≤0.3mm.
[0026] The inner gap of the grid groove 130 and the shape of the boss 200 are both matching squares.
[0027] An oiling nozzle 300 is fixedly connected to the top of the base 100. The bottom of the oiling nozzle 300 passes through the base 100 and communicates with the mesh groove 130. A threaded sealing cap 400 is threadedly connected to the surface of the oiling nozzle 300.
[0028] Example 2, as Figure 3 and Figure 4 As shown, the difference from that in Embodiment 1 is that the groove lines of the mesh groove 130 are interwoven spiral lines, and the inner gap of the mesh groove 130 and the shape of the boss 200 are both matching concave quadrilaterals. The spiral mesh groove 130 has the following advantages over the square mesh groove 130: Superior lubrication guidance: The spiral structure can guide the lubricating oil to flow continuously in a specific direction, promoting uniform oil film distribution. It is especially suitable for rotational motion and can reduce the risk of local dry friction.
[0029] Reduced frictional resistance: The continuous spiral reduces the sharp edges of the oil groove, avoiding turbulence and energy loss caused by abrupt changes in the edges of the square grid groove 130, resulting in a lower coefficient of friction.
[0030] Strong resistance to foreign object jamming: The smooth and continuous spiral path makes it easier to discharge wear particles, while the right-angled areas of the square grid are prone to trapping contaminants and accelerating bearing wear.
[0031] Good adaptability to manufacturing processes: Spiral lines can be completed in one go through CNC machining, which is highly efficient; Square grids require multiple reversal cuttings, which are complex and prone to stress concentration.
[0032] Working principle: The bearing outer ring and the gridded inner hole 110 achieve a stable connection through multi-point micro-interference fit. The evenly distributed bosses 200 form discrete contact points with the bearing outer ring, which can effectively disperse contact stress. At the same time, a small gap is reserved in the non-contact area to store grease. When thermal expansion occurs, the bosses 200 absorb the displacement through elastic deformation, so that the oil film thickness is stably maintained within the preset range. This structural design not only significantly improves the stability of the oil film gap and effectively prevents bearing seizure caused by thermal expansion, but also enhances the overall oil storage capacity of the bearing housing through the grid grooves 130, thereby extending the grease replacement cycle.
[0033] It should be noted that the installation process for the bearing housing and the bearing is as follows: 1. Remove burrs from the 100mm journal of the base and grind it, then apply molybdenum disulfide grease to prevent rust. 2. Fix the base 100 to the corresponding position on the sand making machine frame using bolts that pass through the elongated hole 120.
[0034] 3. Check the flatness of the mounting surface of the base 100 to avoid uneven load caused by base deformation.
[0035] IV. The bearing is embedded into the inner hole 110 using an interference fit process; 5. Tighten the eccentric sleeve by tapping it clockwise onto the surface of the base 100, then tighten the internal hex screw and install a locking washer to prevent loosening.
[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0037] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.
Claims
1. A vertical shaft bearing housing for a sand mill, characterized by, include: The seat (100) has an inner hole (110) at one end and two elongated holes (120) on the upper surface of the seat (100). The two elongated holes (120) are symmetrically distributed on both sides of the inner hole (110). The surface of the inner hole (110) has a grid groove (130). The inner side of the seat (100) is recessed and forms a boss (200) located inside the grid groove (130). The boss (200) is distributed in a matrix.
2. The vertical shaft bearing housing for a sand mill as claimed in claim 1, wherein The depth of the grid groove (130) is X, where 0.1mm≤X≤0.3mm.
3. The vertical shaft bearing housing for a sand mill as set forth in claim 1, wherein The area of the boss (200) is S, where 1mm²≤S≤3mm².
4. The vertical shaft bearing housing for a sand mill as set forth in claim 1, wherein The cross-sectional shape of the grid groove (130) is an isosceles triangle, and the maximum width of the cross-section of the grid groove (130) is W, where 0.1mm≤W≤0.3mm.
5. The vertical shaft bearing housing for a sand mill as set forth in claim 1, wherein The inner gap of the grid groove (130) and the shape of the boss (200) are both matched squares.
6. The vertical shaft bearing housing for a sand mill as set forth in claim 1, wherein The inner gap of the mesh groove (130) and the shape of the boss (200) are both matching concave quadrilaterals.
7. The vertical shaft bearing housing for a sand mill as set forth in claim 1, wherein The top of the seat (100) is fixedly connected to an oil injection nozzle (300), and the bottom of the oil injection nozzle (300) penetrates the seat (100) and communicates with the mesh groove (130).
8. The vertical shaft bearing housing of the sand making machine according to claim 7, characterized in that, The oil nozzle (300) is threadedly connected to a threaded sealing cap (400).