Modular production bearing unit with sealing ring

Abstract

The utility model discloses a modular production bearing unit with sealing ring, including the outer ring of two thrust bearings respectively towards opposite directions, first spring and second spring, set respectively between the mounting groove of the outer ring end face of first thrust bearing and second thrust bearing and shaft sleeve, the inside of sealing shell is equipped with the stepped mounting groove, the outside of second sealing ring is equipped with adjustable adjusting ring, bearing seat, is connected with gear box base through flange structure, and the cavity of bearing seat inside is equipped with the cavity of containing shaft sleeve and sealing shell, thereby, through double sealing ring, design, when main sealing ring failure, can pass through adjusting ring and adjust the pressure of spare sealing ring, need not to dismantle whole structure to compensate wear amount, and this redundancy sealing design has improved the sealing reliability, makes the sealing life to extend from traditional single seal 3 years to 5 years, reduces maintenance frequency and downtime, simultaneously reduces the lubricating oil leakage risk of leading to sealing failure.

Description

Technical Field

[0001] This utility model relates to the field of bearing technology, specifically a modular bearing production unit with a built-in sealing ring. Background Technology

[0002] In existing technologies, bearing units in gear transmission systems typically employ multi-bearing combinations to bear both bidirectional axial and radial forces. For example, a traditional approach uses a double-row self-aligning roller bearing to handle the radial force, and two independent spherical roller bearings to bear the forward and reverse axial thrust, respectively. While this structure meets basic load-bearing requirements, its design is complex, requiring simultaneous machining and adjustment with the gear shaft and gearbox base during installation, resulting in long production cycles and high costs. Furthermore, existing technologies lack integrated sealing designs, necessitating additional sealing devices to prevent lubricant leakage, further increasing structural complexity and maintenance difficulty.

[0003] However, the aforementioned existing technologies have significant drawbacks: First, the combination of multiple bearings results in a loose structure, occupies a large space, and is difficult to meet the needs of compact equipment; second, the reliance on the synchronous manufacturing of gear shafts and gearbox bases makes modular production impossible, resulting in low production efficiency; third, the sealing device is external and singular, and is prone to seal failure due to wear or aging during long-term use, and maintenance requires disassembly of the entire structure, which is inconvenient; fourth, the spring preload mechanism in the existing bearing unit is imperfect, and the bearing is prone to loosening due to axial force fluctuations, affecting the stability of the system.

[0004] Therefore, this utility model provides a modular production bearing unit with a built-in sealing ring. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a modular production bearing unit with a built-in sealing ring to solve the aforementioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a modular production bearing unit with a built-in sealing ring, comprising: a bushing, which is a hollow cylinder, fitted onto the outside of a gear shaft; a first thrust bearing and a second thrust bearing, symmetrically mounted back-to-back on the inner wall of the bushing, with the outer rings of the two thrust bearings facing opposite directions; a first spring and a second spring, respectively disposed between the outer ring end faces of the first and second thrust bearings and the mounting groove of the bushing, for providing axial preload; a sealing housing, fixedly connected to both ends of the bushing, with a stepped mounting groove on the inner side of the sealing housing; a first sealing ring and a second sealing ring, respectively embedded in the stepped mounting groove of the sealing housing, and an adjustable adjusting ring on the outer side of the second sealing ring; and a bearing seat, connected to the gearbox base via a flange structure, with a cavity inside the bearing seat accommodating the bushing and the sealing housing.

[0007] Preferably, both the first thrust bearing and the second thrust bearing are spherical roller thrust bearings, with their outer rings having an interference fit with the inner wall of the bushing.

[0008] Preferably, the first spring and the second spring are cylindrical helical compression springs.

[0009] Preferably, the adjusting ring is an annular metal part that is threadedly connected to the end of the sealing housing.

[0010] Preferably, the connecting surface between the sealing housing and the bushing is provided with a positioning pin hole, which enables quick alignment and installation.

[0011] Preferably, the flange connection surface of the bearing housing is provided with a plurality of evenly distributed bolt holes.

[0012] Preferably, the first and second sealing rings are made of nitrile rubber and have an X-shaped cross-section.

[0013] Beneficial effects

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] (1) This utility model integrates the first thrust bearing and the second thrust bearing back-to-back in the bushing and uses a spring to provide preload, which significantly simplifies the structural layout of the bearing unit. Compared with the traditional multi-bearing combination design, the bearing unit of this utility model occupies less space. During installation, the bushing and the sealing housing are pre-assembled as independent modules and quickly connected to the bearing seat by positioning pins and bolts. There is no need for a complicated debugging process, which greatly improves the installation efficiency and facilitates later maintenance and replacement.

[0016] (2) This utility model uses a double sealing ring design. When the main sealing ring fails, the clamping amount of the backup sealing ring can be adjusted by adjusting the ring. The wear can be compensated without disassembling the overall structure. This redundant sealing design significantly improves the sealing reliability and extends the sealing life from one month to one month in the traditional single seal. It reduces the frequency of maintenance and downtime, and at the same time reduces the risk of lubricating oil leakage due to sealing failure. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the present invention.

[0018] In the diagram: 1. Bushing; 3. Sealing housing; 4. Adjusting ring; 5. First sealing ring; 6. Second sealing ring; 7. First spring; 9. First thrust bearing; 10. Locating pin; 11. Bearing housing; 12. Second thrust bearing; 13. Second spring; 15. Gear shaft. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1 A modular bearing production unit with integrated sealing rings includes: a bushing 1, a hollow cylinder, fitted onto the outside of a gear shaft 15; a first thrust bearing 9 and a second thrust bearing 12, symmetrically mounted back-to-back on the inner wall of the bushing 1, with the outer rings of the two thrust bearings facing opposite directions; a first spring 7 and a second spring 13, respectively disposed between the end faces of the outer rings of the first thrust bearing 9 and the second thrust bearing 12 and the mounting groove of the bushing 1, for providing axial preload; a sealing housing 3, fixedly connected to both ends of the bushing 1, with a stepped mounting groove on the inner side of the sealing housing 3; a first sealing ring 5 and a second sealing ring 6, respectively embedded in the stepped mounting groove of the sealing housing 3, with an adjustable adjusting ring 4 on the outer side of the second sealing ring 6; and a bearing seat 11, connected to a gearbox base 16 via a flange structure, with a cavity inside the bearing seat 11 accommodating the bushing 1 and the sealing housing 3.

[0021] It should be noted that the bushing 1 described in this embodiment is a hollow cylinder made of wear-resistant steel, with symmetrical annular mounting grooves machined on its inner wall for fixing the first thrust bearing 9 and the second thrust bearing 12. The bushing 1 is sleeved on the outside of the gear shaft 15 and connected to the gear shaft 15 by an interference fit. The first thrust bearing 9 and the second thrust bearing 12 are symmetrically installed back-to-back in the mounting grooves on the inner wall of the bushing 1, with their outer rings facing opposite directions. They are fixed by the mounting grooves of the bushing 1. The first spring 7 and the second spring 13 are cylindrical helical compression springs, respectively disposed between the outer ring end faces of the two thrust bearings and the bottom surface of the mounting grooves of the bushing 1, and are kept in a preloaded state by the preload. The sealing housing 3 is pressed into the mounting groove and fixedly connected to both ends of the bushing 1. The inner side is provided with a stepped mounting groove. The height difference of the stepped groove is used for layered installation of the sealing ring. The sealing housing 3 is connected to the bushing 1 by bolts. The end is provided with a threaded structure to install the adjusting ring 4. The first sealing ring 5 and the second sealing ring 6 are respectively embedded in the stepped mounting groove of the sealing housing 3. The outer side of the second sealing ring 6 is provided with an adjustable adjusting ring 4. The clamping amount of the second sealing ring 6 can be adjusted by rotating the adjusting ring 4. The bearing seat 11 is a split structure. The inside is provided with a cavity to accommodate the bushing 1 and the sealing housing 3. The bottom is connected to the gearbox base 16 through a flange structure. The flange surface is provided with evenly distributed bolt holes for fixing.

[0022] The first thrust bearing 9 and the second thrust bearing 12 are both spherical roller thrust bearings, with their outer rings having an interference fit with the inner wall of the bushing 1.

[0023] It should be noted that the first thrust bearing 9 and the second thrust bearing 12 described in this embodiment are spherical roller thrust bearings. Their outer ring surfaces are machined with anti-rotation grooves, which cooperate with the flanges on the inner wall of the bushing 1 to prevent the bearing from rotating circumferentially. The inner ring is clearance-fitted with the gear shaft 15 to ensure axial sliding freedom.

[0024] The first spring 7 and the second spring 13 are cylindrical helical compression springs.

[0025] It should be noted that the free length of the cylindrical helical compression spring described in this embodiment is slightly greater than the depth of the mounting groove of the bushing 1. After installation, it is in a compressed state, and the two ends of the spring are flattened to uniformly transmit the preload.

[0026] The adjusting ring 4 is a ring-shaped metal part that is threaded to the end of the sealing housing 3.

[0027] It should be noted that the adjusting ring 4 described in this embodiment is an annular metal part with an internal thread on its inner side, which mates with the external thread at the end of the sealing housing 3. The adjusting ring 4 has evenly distributed adjusting holes on its outer circumference, which can be rotated axially by a tool to adjust the pressing position of the second sealing ring 6.

[0028] The sealing housing 3 and the bushing 1 are connected by positioning holes, and quick alignment and installation are achieved by positioning pin 10. The flange connection surface of the bearing seat 11 is provided with multiple evenly distributed bolt holes. The first sealing ring 5 and the second sealing ring 6 are made of nitrile rubber or fluororubber, and the cross section is fishhook shaped.

[0029] It should be noted that the connecting surfaces of the sealing housing 3 and the bushing 1 described in this embodiment are provided with symmetrical positioning holes, and quick alignment and installation are achieved through cylindrical positioning pins 10. The diameter of the positioning pin 10 is clearance-fitted with the pin hole, and after being inserted into the pin hole during installation, the circumferential position is locked. The bolt holes on the flange connecting surface are evenly distributed circumferentially, and the bolt holes are embedded with sealing grooves. An annular seal is installed in the groove to enhance the sealing performance of the connecting surface. The first sealing ring 5 and the second sealing ring 6 are fishhook-shaped cross-section sealing rings made of oil-resistant rubber. The thickness of the second sealing ring 6 is slightly larger than that of the first sealing ring 5 to provide redundant sealing capability.

[0030] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0031] Working principle: The bearing unit uses two thrust bearings mounted back-to-back inside the bushing 1 to bear the forward and reverse axial forces respectively. A spring provides preload to keep the outer ring of the bearing pressed against the mounting groove of the bushing 1, eliminating axial clearance. The radial force is shared by the two bearings, reducing local load. The sealing housing 3 has a double sealing ring embedded in it. When the main seal fails, the clamping amount of the backup seal is adjusted by the adjusting ring 4 to achieve redundant sealing. The modular design allows the bushing 1, bearings, and sealing structure to be pre-assembled independently and quickly connected to the bearing housing 11 via the locating pin 10 and bolts. There is no need to simultaneously machine the gear shaft 15 and gearbox base 16, which solves the problems of loose structure, insufficient sealing, low production efficiency, and inconvenient maintenance in the prior art. Through compact integration, redundant sealing, and preload mechanism, a highly efficient, stable, and easy-to-maintain bearing unit is achieved.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] 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 modular bearing production unit with integrated sealing ring, characterized in that, include: The bushing (1) is a hollow cylinder and is fitted on the outside of the gear shaft (15); The first thrust bearing (9) and the second thrust bearing (12) are symmetrically installed on the inner wall of the bushing (1) in a back-to-back manner, with the outer rings of the two thrust bearings facing opposite directions respectively. The first spring (7) and the second spring (13) are respectively disposed between the outer ring end face of the first thrust bearing (9) and the second thrust bearing (12) and the mounting groove of the bushing (1) to provide axial preload. A sealing housing (3) is fixedly connected to both ends of the bushing (1), and a stepped mounting groove is provided on the inner side of the sealing housing (3); The first sealing ring (5) and the second sealing ring (6) are respectively embedded in the stepped mounting groove of the sealing housing (3), and an adjustable adjustment ring (4) is provided on the outside of the second sealing ring (6). The bearing housing (11) is connected to the gearbox base (16) via a flange structure. The bearing housing (11) has a cavity inside that accommodates the bushing (1) and the sealing housing (3).

2. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The first thrust bearing (9) and the second thrust bearing (12) are both spherical roller thrust bearings, and their outer rings are interference-fitted with the inner wall of the bushing (1).

3. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The first spring (7) and the second spring (13) are cylindrical helical compression springs.

4. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The adjusting ring (4) is an annular metal part that is threaded to the end of the sealing housing (3).

5. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The sealing housing (3) and the bushing (1) are provided with a positioning pin hole, and quick alignment and installation can be achieved by positioning pin (10).

6. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The flange connection surface of the bearing housing (11) is provided with a plurality of evenly distributed bolt holes.

7. The modular production bearing unit with integrated sealing ring according to claim 1, characterized in that: The first sealing ring (5) and the second sealing ring (6) are made of nitrile rubber or fluororubber, and have a fishhook-shaped cross section.

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