A bearing chamber end cap

Abstract

The utility model relates to bearing chamber oil level detection technical field especially relates to a kind of bearing chamber end cover, including end cap body, shaft rod, movable scale and counterweight;End cap body is made of transparent material, and the end cap body is used to be connected with the bearing chamber body thread;Shaft rod is set in the inside middle part of the end cap body, and with the axial direction parallel of the end cap body;Movable scale includes scale body, the scale body includes annular part, the annular part is set in the shaft rod;Counterweight is set in the lower end of the movable scale;Bearing chamber end cover provided by the utility model can avoid or reduce subjective error and eliminate the scale deviation error caused by bearing chamber end cover rotary installation.

Description

Technical Field

[0001] This utility model relates to the field of bearing housing oil level detection technology, and in particular to a bearing housing end cover. Background Technology

[0002] Currently, the oil level calibration of water pump bearing chambers is mainly achieved through methods such as the oil window indicator method, the dipstick method, and the oil cup method. Research on bearing chamber oil level calibration often requires oil filling tests, and the success of these tests is frequently influenced by many factors, such as the operating status of the equipment, the machining location of the oil filling hole, and empirical values.

[0003] Existing calibration methods mainly rely on the operator's subjective visual judgment and lack reasonable quantitative calibration methods, which results in large errors and affects the accuracy of calibration. Summary of the Invention

[0004] This invention provides a bearing housing end cover with a movable scale, which can avoid or reduce subjective errors and eliminate scale offset errors caused by rotating the bearing housing end cover during installation.

[0005] This utility model provides a bearing chamber end cover, comprising:

[0006] The end cap body is made of a transparent material and is used for threaded connection with the bearing housing body;

[0007] A shaft is located in the middle of the inner side of the end cap body and is parallel to the axial direction of the end cap body;

[0008] A movable scale includes a scale body, the scale body including an annular portion, the annular portion being sleeved on the shaft;

[0009] A counterweight is placed at the lower end of the movable scale.

[0010] In one embodiment of the present invention, a stabilizing component is further included. The stabilizing component includes a first magnet disposed outside the end cap body, and a second magnet is the counterweight. The first magnet is disposed directly below the second magnet and is attracted to the second magnet by opposite poles.

[0011] In one embodiment of the present invention, the movable scale has an inner cavity, one end of which near the counterweight is connected to the outside, and a suspended object that is capable of floating on the surface of the oil and is hydrophobic and oleophobic is disposed in the inner cavity.

[0012] In one embodiment of this utility model, the suspended object and the scale lines on the movable ruler have a fluorescent layer.

[0013] In one embodiment of the present invention, a sealing ring is provided between the end cap body and the bearing chamber body, and the end cap body and the bearing chamber body are connected by an external thread seal or an internal thread seal.

[0014] In one embodiment of the present invention, an oil storage cavity is provided between the end cap body and the bearing chamber body;

[0015] The oil storage chamber is equipped with a liquid level regulating component, which is configured to move in the height direction of the oil storage chamber to adjust the space it occupies in the oil.

[0016] In one embodiment of the present invention, the shaft is rotatably connected to the end cap body and extends out of the end cap body. The liquid level adjustment assembly includes an eccentric body disposed in the oil storage cavity. The eccentric body is disposed on the shaft and is configured to be adjusted to different height positions in the oil storage cavity by the rotation of the shaft.

[0017] In one embodiment of the present invention, a detachable sealing assembly is provided between the shaft and the end cap body.

[0018] In one embodiment of the present invention, the sealing assembly includes a sealing ring and a sealing lock nut that is threadedly connected to the shaft, the sealing lock nut being disposed against the sealing ring.

[0019] In one embodiment of the present invention, the eccentric body is made of a hydrophobic and oleophobic material.

[0020] The beneficial effects of this utility model are as follows: The bearing chamber end cover proposed in this utility model has a transparent body that allows direct observation of the internal oil level at the movable scale, achieving accurate measurement of the liquid level and eliminating calibration deviations caused by subjective judgment. The annular part of the movable scale is rotatably set along the shaft, and the counterweight, under the action of gravity, keeps the scale body in the vertical direction, unaffected by the rotation angle between the end cover body and the bearing chamber body, thus forming an objective quantitative reading benchmark. The full circumferential thread engagement between the end cover body and the bearing chamber body forms a multi-seal interface, effectively blocking the lubricating oil leakage path. Compared with the local tightening method of bolt connection, it significantly improves the sealing reliability, and the tightening process generates uniform radial compressive stress without local stress concentration points, further contributing to the overall sealing performance improvement. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram showing the connection between the bearing housing end cover and the bearing housing body according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the movable scale structure provided in one embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram showing the structure in which the scale marks are offset due to the rotation angle deviation between the bearing housing end cover and the bearing housing body when the bearing housing end cover is threaded to the bearing housing body.

[0026] Figure 4 This is a schematic diagram showing the connection between the bearing chamber end cover and the bearing chamber body provided in another embodiment of the present invention;

[0027] The attached figures are labeled as follows: bearing housing body 10, oil reservoir 101, oil filling hole plug 102, oil level 103, end cover body 1, first sealing ring 11, shaft 2, through hole 21, movable scale 3, inner cavity 31, suspended matter 32, annular part 33, counterweight 4, stabilizing component 5, first magnet 51, bracket 52, liquid level adjustment component 6, eccentric body 61, sealing component 7, second sealing ring 71, sealing lock nut 72. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0031] Please see Figure 1 This utility model provides a bearing housing end cover, including an end cover body 1, a shaft 2, a movable scale 3, and a counterweight 4; the end cover body 1 is made of a transparent material and is used for threaded connection with the bearing housing body 10; the shaft 2 is disposed in the middle of the inner side of the end cover body 1 and is parallel to the axial direction of the end cover body 1; the movable scale 3 includes a scale body, the scale body includes an annular portion 33, the annular portion 33 is sleeved on the shaft 2; the counterweight 4 is disposed at the lower end of the movable scale 3.

[0032] It should be noted that the end cap body 1 is made of a transparent material to enable oil level visualization. This transparent material encompasses three implementation methods: polymer, glass, and composite transparent materials. The polymer includes polycarbonate or polymethyl methacrylate, the glass includes tempered glass or borosilicate glass, and the composite transparent material includes a laminated composite structure of transparent ceramic and polymer resin. The end cap body 1 and the bearing chamber body 10 are connected by threads. For example, the outer circumference of the end cap body 1 is machined with continuous external threads (or internal threads), which engage with the internal threads (or external threads) of the bearing chamber body 10. The preferred thread type is tapered pipe thread (NPT) or metric sealing thread (MJ), used in conjunction with sealant or O-rings. The shaft 2 is vertically fixed to the inner central region of the end cap body 1 and its axis is parallel to the centerline of the end cap. Its installation methods include integral molding with the end cap body 1, interference fit embedding into a pre-drilled hole, or detachable installation via a threaded base. The movable scale 3 includes a scale body, which includes an annular portion 33. The annular portion 33 is sleeved on the shaft 2 to form a rotating pair. The scale graduations on the surface of the scale body are formed by metal foil etching, ceramic spraying, or polymer molding. A counterweight 4 is fixed to the lower end of the movable scale 3 and has a density greater than that of lubricating oil. The counterweight 4 may be a lead-tin alloy block, a tungsten-nickel alloy cylinder, or a metal powder core encapsulated in a stainless steel shell. The connection method includes threaded connection, snap-locking, or adhesive fixation.

[0033] Traditional metal end caps and bearing housing bodies 10 are typically connected by bolts, usually requiring four to eight bolts. However, the end cap body 1 in this case is made of a transparent material, which is generally made of materials with low structural strength, such as acrylic transparent sheets or glass. If fixed with bolts, the excessive force applied by the bolts could cause deformation or cracking of the end cap body 1, thus hindering long-term sealing of the bearing housing body 10. Furthermore, the use of multiple bolts to connect the end cap and bearing housing body 10 in traditional metal products can easily lead to incomplete sealing and cumbersome disassembly and assembly processes. In contrast, the threaded rotary connection between the end cap body 1 and bearing housing body 10 in this case... Figure 3 As shown, if the scale marks are directly engraved on the surface of the end cap body 1, the scale lines will be tilted due to the uncertain rotation angle of the end cap body 1, which will affect the accurate reading of the oil level and thus fail to meet the usage requirements.

[0034] In this invention, the transparency of the end cap body 1 allows direct observation of the internal movable scale 3, eliminating calibration deviations caused by subjective judgment. The annular portion 33 of the movable scale 3 is rotatably mounted along the shaft 2, and the counterweight 4, under the influence of gravity, keeps the scale body in the vertical direction, unaffected by the rotation angle between the end cap body 1 and the bearing chamber body 10, thus forming an objective quantitative reading benchmark. The full circumferential thread engagement between the end cap body 1 and the bearing chamber body 10 generates a continuous compression sealing band, and the threaded connection structure forms multiple sealing interfaces, effectively blocking the lubricating oil leakage path. Compared with the local tightening method of bolt connection, it significantly improves the sealing reliability, and the tightening process generates uniform radial compressive stress without local stress concentration points, which further enhances the sealing performance and avoids or reduces the problem of reduced structural strength or sealing performance caused by multiple bolt holes.

[0035] As an optional embodiment of this case, the bearing chamber end cover further includes a stabilizing component 5. The stabilizing component 5 includes a first magnet 51 disposed outside the end cover body 1, and the counterweight 4 is a second magnet. The first magnet 51 is disposed directly below the second magnet and is attracted to the second magnet by opposite polarities.

[0036] It should be noted that the stabilizing component 5 rapidly enhances the swing stability of the movable scale 3 through magnetic attraction. The first magnet 51 is fixed to the outer bottom surface of the end cap body 1, for example, by connecting it to the bearing chamber body 10 through the bracket 52 or by directly fixing it to the ground; this invention utilizes the attraction of opposite magnetic poles to form a vertically downward stabilizing force field. This force field, together with gravity, acts on the movable scale 3, suppressing horizontal displacement, which helps the swinging movable scale 3 to quickly stabilize, thereby reducing the time spent reading the liquid level.

[0037] As an optional embodiment of this case, the movable scale 3 has an inner cavity 31, one end of which near the counterweight 4 is connected to the outside. The inner cavity 31 is provided with a suspended object 32 that is capable of floating on the surface of the oil and is hydrophobic and oleophobic.

[0038] It should be noted that the movable scale 3 has a hole penetrating the inner cavity 31, with its bottom opening positioned near the counterweight 4, allowing oil to freely enter and exit the inner cavity 31. Suspended matter 32 is disposed within the inner cavity 31, and its density is less than that of the lubricating oil. Suspended matter 32 can be, for example, hydrophobic and oleophobic polyethylene closed-cell foam, polytetrafluoroethylene microspheres, or surface-silanized modified ceramic hollow spheres. Suspended matter 32 is fitted with the inner wall of the inner cavity 31 with a clearance fit, ensuring its vertical movement along the inner cavity 31 under the buoyancy of the oil. Suspended matter 32 is propelled to the oil interface by the buoyancy of the oil, and its position directly indicates the oil level. The suspended matter 32 can be made in a bright color, such as red, to facilitate rapid observation of the oil level.

[0039] As an optional embodiment of this case, the shaft 2 is provided with a through hole 21, the through hole 21 connects the upper and lower parts of the annular part 33 of the scale body, and the suspended object 32 is smaller than the inner diameter of the through hole 21 so that the suspended object 32 can pass smoothly through the through hole 21.

[0040] As an optional embodiment of this case, the suspended object 32 and the scale lines on the movable ruler 3 have a fluorescent layer.

[0041] It should be noted that the outer surface of the suspended object 32 and the graduation lines of the movable scale 3 are covered with a fluorescent layer, such as zinc sulfide-based luminescent coating, rare earth aluminate phosphor coating, or photoluminescent polymer film. The fluorescent layer is formed by spraying, dipping, or vacuum coating processes. It excites visible light in low-light environments, thereby enhancing the visibility of the observed target, solving the problem of difficult scale reading in dim conditions, and expanding the applicable environment of the equipment; the fluorescent mark forms an optical contrast with the oil, reducing visual errors.

[0042] As an optional embodiment of this case, a first sealing ring 11 is provided between the end cover body 1 and the bearing chamber body 10, and the end cover body 1 and the bearing chamber body 10 are connected by an external thread or an internal thread.

[0043] It should be noted that a first sealing ring 11 is provided at the threaded connection interface between the end cap body 1 and the bearing housing body 10. The first sealing ring 11 can be installed by either slotting the end face of the end cap body 1 or positioning it with a stepped groove at the threaded end of the bearing housing body 10. The material of the first sealing ring 11 is, for example, oil-resistant EPDM rubber, fluororubber, or silicone rubber composite material. During the tightening of the threads, the first sealing ring 11 undergoes radial compression deformation, filling the gaps in the metal threads to form multiple sealing barriers. This compensates for the micro-leakage defects of a pure threaded connection, improving the sealing performance compared to a solution without a sealing ring and ensuring sealing reliability under different operating conditions.

[0044] The amount of oil in the bearing housing directly affects the operation of the equipment. Too little oil causes dryness and wear, affecting the equipment's lifespan; too much oil causes oil spillage. During the oiling process, the oil level must not fall below the lowest calibration mark, which is the outer ring of the bearing. As the oil level continues to increase, it should gradually submerge the roller calibration mark, but not the highest calibration mark. However, sometimes, as the oil in the bearing housing is consumed, the oil level will gradually decrease. If the oil tank is not replenished in this case, it will easily lead to damage to the bearing housing and affect the equipment's service life. Therefore, this case provides the following technical solution, which can temporarily solve the problem of insufficient oil in the bearing housing body 10. The specific solution is as follows:

[0045] An oil storage chamber 101 is provided between the end cap body 1 and the bearing chamber body 10; a liquid level adjustment component 6 is provided in the oil storage chamber 101, and the liquid level adjustment component 6 is configured to be able to move in the height direction of the oil storage chamber 101 to adjust the space occupied by itself in the oil.

[0046] It should be noted that an oil storage cavity 101 is formed between the end cap body 1 and the bearing chamber body 10. The liquid level regulating component 6 is disposed within the oil storage cavity 101 and can move in the height direction of the oil storage cavity 101 to dynamically change the effective oil storage volume. Its movement methods include screw lifting, gear and rack drive, or manual slide rail adjustment. The liquid level regulating component 6 can be implemented as a piston diaphragm, deformable bladder, or helical blade structure, achieving linear oil level regulation by changing the volume it occupies.

[0047] This invention directly changes the free space volume of the oil reservoir 101 by axially displacing the level regulating component 6 within the reservoir. When the level regulating component 6 moves towards the bottom of the reservoir, it encroaches on the volume of the reservoir 101, causing the oil level to rise; conversely, it increases the oil storage space, causing the oil level to drop. This forms a mechanical volume control mechanism, thereby achieving dynamic and precise adjustment of the oil level during bearing operation and avoiding the efficiency loss caused by traditional shutdown oil replenishment. The volumetric regulation is unaffected by the viscosity of the oil, ensuring consistent control under different operating conditions.

[0048] As an optional embodiment of this case, the shaft 2 is rotatably connected to the end cap body 1 and extends out of the end cap body 1. The liquid level adjustment component 6 includes an eccentric body 61 disposed in the oil storage cavity 101. The eccentric body 61 is disposed on the shaft 2. The eccentric body 61 is configured to be adjusted to different height positions in the oil storage cavity 101 by the rotation of the shaft 2.

[0049] It should be noted that the shaft 2 is rotatably connected to the end cap body 1 via a rotary sealing structure, and its protruding end can be an external hexagonal head, an internal hexagonal groove, or a handwheel interface. The eccentric body 61 is fixed to the section of the shaft 2 located within the oil storage cavity 101, and its geometry includes a semi-cylinder, a sector block, or a wedge block. When the eccentric body 61 rotates with the shaft 2, its center of mass shifts, creating an asymmetrical profile. Continuous switching from the maximum to the minimum oil discharge volume is achieved through 0°-180° angle adjustment. This invention utilizes the rotation of the eccentric body 61 to change its projected cross-sectional area within the oil storage cavity 101. When the thick end of the eccentric body 61 faces the bottom of the cavity, it occupies the maximum space to raise the oil level; when the thin end faces downwards, it releases space to lower the oil level. The oil level height is precisely controlled by the rotation angle of the shaft 2.

[0050] As an optional embodiment of this case, a detachable sealing assembly 7 is provided between the shaft 2 and the end cover body 1.

[0051] It should be noted that a detachable sealing assembly 7 is provided at the rotatable connection between the shaft 2 and the end cap body 1. The structural implementation of this assembly includes a mechanical seal ring assembly, a lip seal ring, or a stuffing box gland structure. The sealing assembly 7 is made of materials including polytetrafluoroethylene composite material, fluororubber elastomer, or a metal-ceramic composite layer, adaptable to different temperatures and oil conditions.

[0052] As an optional embodiment of this case, the sealing assembly 7 includes a second sealing ring 71 and a sealing lock nut 72 threadedly connected to the shaft 2, wherein the sealing lock nut 72 is disposed against the second sealing ring 71.

[0053] It should be noted that the second sealing ring 71 is installed in the sealing groove of the shaft 2, and the sealing locking nut 72 is threaded with the external thread of the shaft 2. Its locking surface shape includes planar pressing, conical extrusion, or spherical adaptive structure. When the nut is tightened, an axial compressive force is applied to the second sealing ring 71, causing it to expand radially and fill the gap between the shaft 2 and the end cover, thereby eliminating oil leakage from the micro-gap between the rotating shaft 2 and the stationary end cover body 1, and improving the sealing pressure resistance level.

[0054] As an optional embodiment of this case, the eccentric body 61 is made of a hydrophobic and oleophobic material with a surface energy lower than the critical value of lubricating oil, such as polytetrafluoroethylene composite material, surface-fluorinated aluminum alloy or nano-silica modified ceramic, so that oil molecules cannot wet the material surface, ensuring the reliability of operation during long-term operation, and the material inertness extends the service life of the component in corrosive oils.

[0055] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bearing housing end cover, characterized in that, include: The end cap body is made of a transparent material and is used for threaded connection with the bearing housing body; A shaft is located in the middle of the inner side of the end cap body and is parallel to the axial direction of the end cap body; A movable scale includes a scale body, the scale body including an annular portion, the annular portion being sleeved on the shaft; A counterweight is placed at the lower end of the movable scale.

2. A bearing chamber end cover according to claim 1, characterized in that, It also includes a stabilizing component, which includes a first magnet disposed outside the end cap body, and a second magnet as a counterweight. The first magnet is disposed directly below the second magnet and is attracted to the second magnet by opposite poles.

3. A bearing chamber end cover according to claim 1, characterized in that, The movable scale has an inner cavity, one end of which is connected to the outside near the counterweight. The inner cavity contains a suspended object that is hydrophobic and oleophobic and can float on the surface of the oil.

4. A bearing chamber end cover according to claim 3, characterized in that, The suspended object and the scale lines on the movable ruler have a fluorescent layer on their surfaces.

5. A bearing chamber end cover according to claim 1, characterized in that, A sealing ring is provided between the end cap body and the bearing chamber body, and the end cap body and the bearing chamber body are connected by an external thread seal or an internal thread seal.

6. A bearing chamber end cover according to claim 1, characterized in that, An oil storage cavity is provided between the end cap body and the bearing chamber body; The oil storage chamber is equipped with a liquid level regulating component, which is configured to move in the height direction of the oil storage chamber to adjust the space it occupies in the oil.

7. A bearing chamber end cover according to claim 6, characterized in that, The shaft is rotatably connected to the end cap body and extends out of the end cap body. The liquid level adjustment assembly includes an eccentric body disposed in the oil storage cavity. The eccentric body is disposed on the shaft and is configured to be adjusted to different height positions in the oil storage cavity by the rotation of the shaft.

8. A bearing chamber end cover according to claim 7, characterized in that, A detachable sealing assembly is provided between the shaft and the end cap body.

9. A bearing chamber end cover according to claim 8, characterized in that, The sealing assembly includes a sealing ring and a sealing lock nut that is threadedly connected to the shaft, the sealing lock nut being disposed against the sealing ring.

10. A bearing chamber end cover according to claim 7, characterized in that, The eccentric body is made of a hydrophobic and oleophobic material.

Images