Installation tool for tandem bearings

Abstract

The invention relates to the technical field of tandem bearing installation, in particular to a tandem bearing installation tool which comprises a main body, a bearing fixing device and a bearing fixing device. The end cover is detachably arranged at the end part of the main body and is matched with the main body to limit the axial direction of the serial bearing; wherein the main body is formed by splicing a first main body part and a second main body part which are detachably connected; the tandem bearing has the beneficial effects that radial and axial limiting of the tandem bearing is achieved through cooperation of the main body and the end cover, the main body is detachably spliced, operation is convenient, and the tandem bearing has the advantages that the assembly efficiency and precision are improved, and the installation accuracy of the tandem bearing is ensured.

Description

Technical Field

[0001] This invention belongs to the field of tandem bearing installation, and specifically relates to an installation fixture for tandem bearings. Background Technology

[0002] Screw drills are core downhole power tools in the oil drilling field, widely used in various drilling operations. Their performance directly determines the efficiency, stability, and safety of drilling operations. The drive shaft assembly, a key component of the screw drill, is crucial for power transmission and load bearing. It mainly consists of tandem bearings, radial bearings, the drive shaft, the housing, and other auxiliary parts. These components work together to efficiently transmit power and bear loads under complex conditions during drilling.

[0003] Among them, the tandem bearing is the core force-bearing and force-transmitting component of the drive shaft assembly. On the one hand, it needs to stably and efficiently transmit the rotational power output by the screw drill motor to the drill bit to provide continuous power for drilling operations. On the other hand, it also needs to withstand the axial and radial loads generated by drilling pressure during the drilling process, and ensure the normal operation of the drive shaft assembly under complex downhole conditions. Its installation accuracy and assembly quality are directly related to the working stability, reliability and service life of the drive shaft assembly and even the entire screw drill.

[0004] In existing technologies, the assembly of screw drill drive shaft assemblies involves the manual installation of tandem bearings group by group. This method has significant technical defects and drawbacks in practical applications, making it difficult to meet the dual high requirements of modern oil drilling industry for drilling equipment assembly efficiency and quality. Specifically, the manual installation process is cumbersome, with long assembly times for each drive shaft assembly bearing, resulting in low overall assembly efficiency and failing to meet the needs of large-scale, high-efficiency equipment production and maintenance. Furthermore, tandem bearings have a multi-row structure, requiring precise positioning of each row of bearings during assembly. However, manual operation is susceptible to factors such as human experience and operational precision, and even slight deviations in the installation position of each row of bearings can accumulate into cumulative errors, leading to insufficient overall assembly precision of the tandem bearings.

[0005] This cumulative error not only causes uneven stress on the tandem bearings during operation, exacerbating the wear of the internal raceways and rolling elements, and reducing the reliability of the bearings, but also affects the coaxiality and rotational accuracy of the drive shaft assembly. This causes vibration and wobbling problems in the drive shaft during operation, further causing additional impact and wear on other components such as the radial bearings and drive shaft. This significantly reduces the overall working stability of the drive shaft assembly, shortens its service life, and in severe cases, can even lead to malfunctions of the screw drill during downhole operations, affecting the normal conduct of drilling operations and increasing the cost and risk of drilling construction.

[0006] Therefore, a mounting fixture for tandem bearings is needed to overcome the aforementioned problems. Summary of the Invention

[0007] To address the aforementioned problems, embodiments of the present invention provide an installation fixture for tandem bearings, thereby achieving the objective of resolving the issues raised in the background art.

[0008] To achieve the above objectives, the present invention employs the following technical solution: a mounting fixture for a tandem bearing, comprising: a main body for placing the tandem bearing and simultaneously limiting its radial direction; and an end cap detachably disposed at the end of the main body, which cooperates with the main body to limit the axial direction of the tandem bearing; wherein the main body is formed by detachably connecting a first main body portion and a second main body portion.

[0009] As a further improvement to the above technical solution:

[0010] Both the first main body and the second main body are provided with connecting posts and connecting members; the connecting member is provided with a snap-fit ​​hole that engages with the connecting post; by rotating the connecting member, the snap-fit ​​hole engages with the connecting post to lock the first main body and the second main body.

[0011] The outer surface of the end cap is provided with an "L"-shaped slot, and both the first main body and the second main body are provided with a locking block for use with the slot; after the locking block is inserted into the slot, it can slide along its horizontal section to lock the end cap axially onto the main body.

[0012] The “L”-shaped slot includes a vertical section and a horizontal section connecting the end of the vertical section; the locking block is adapted to be inserted into the slot along the vertical section, and the locking block is slid along the horizontal section by rotating the end cap to achieve axial locking between the end cap and the body.

[0013] When the first main body and the second main body are joined together, they form a receiving cavity for accommodating the tandem bearing. The main body is provided with a lower positioning part for positioning the tandem bearing. The lower positioning part is a stepped hole integrally formed on the lower surface of the first main body and the second main body.

[0014] The end cap is provided with an upper positioning part for positioning the tandem bearing. The upper positioning part is a stepped hole II opened on the inner side of the end cap. The stepped hole II includes a groove section that matches the outer diameter of the tandem bearing and a through hole section that matches the inner hole of the tandem bearing.

[0015] Both the first main body and the second main body include an upper ring portion and a lower ring portion, which are connected by at least two connecting rods.

[0016] The distance between any two adjacent connecting rods on the first main body and the second main body is less than the outer diameter of the tandem bearing, and the inscribed circle diameter of the plurality of connecting rods is the same as the outer diameter of the tandem bearing.

[0017] The upper surface of the end cap is provided with two hooks for connecting the lifting device.

[0018] The beneficial effects of the embodiments of the present invention are as follows: This application achieves radial and axial positioning of the tandem bearing through the cooperation of the main body and the end cap. The main body can be disassembled and assembled for easy operation, which has the advantages of improving assembly efficiency and precision and ensuring the accuracy of tandem bearing installation. This application uses a main body to radially limit the tandem bearing, and a detachable end cap that engages with the main body to axially limit the tandem bearing. The main body is formed by detachably connecting a first main body and a second main body. Therefore, this tooling simplifies the installation process of the tandem bearing, improves assembly efficiency, and effectively avoids cumulative errors that may result from manual operation, thereby ensuring the installation accuracy and assembly quality of the tandem bearing, and ultimately improving the working stability and service life of the screw drill drive shaft assembly. In the installation fixture for tandem bearings, the connection stability between the first and second main body sections has been significantly improved. The use of connecting columns, connecting parts, and snap-fit ​​holes provides a simple and efficient locking method; assembly and disassembly of the main body sections can be completed simply by rotating the connecting parts, greatly improving the efficiency of the fixture. Simultaneously, this robust snap-fit ​​ensures the radial positioning accuracy and axial stability of the tandem bearings during installation, guaranteeing smooth installation operations and the long-term reliable operation of the fixture. Through the above technical solution, when the tandem bearing is placed in the receiving cavity formed by the first main body and the second main body, the stepped hole integrally formed on the lower surface of the first main body and the second main body can accurately support the bottom of the tandem bearing and perform initial radial and axial positioning. This effectively solves the problem of inaccurate initial positioning of the tandem bearing in the installation fixture, ensuring the stability and accuracy of the tandem bearing in subsequent installation operations. Attached Figure Description

[0019] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the end cap of the present invention; Figure 3 This is a schematic diagram of the structure of the main body of the present invention; Figure 4 This is a reference diagram showing the usage state of the present invention.

[0020] In the diagram: 1. Main body; 12. Locking block; 13. Connecting post; 14. Connecting piece; 15. Locking hole; 16. Connecting rod; 2. End cap; 21. Slot; 22. Hook. Detailed Implementation

[0021] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0022] The installation of tandem bearings in existing traditional screw drill drive shaft assemblies is done manually, one group at a time. This process is cumbersome, time-consuming, and inefficient. Manual operation is susceptible to limitations in experience and precision, leading to cumulative errors in the installation position of each bearing row. This results in uneven stress on the tandem bearings, accelerated wear, reduced reliability, and affects the coaxiality and rotational accuracy of the drive shaft assembly, shortening its service life and increasing the risk of failure and construction costs.

[0023] See Figures 1 to 4 This invention discloses an installation fixture for a tandem bearing, comprising a main body 1 and an end cap 2. The main body 1 is used to place the tandem bearing and limit its radial direction, while the end cap 2 is detachably disposed at the end of the main body 1 and cooperates with the main body 1 to limit the axial direction of the tandem bearing. The main body 1 is formed by detachably connecting a first main body portion and a second main body portion.

[0024] For ease of understanding, some key components in this embodiment are explained below: Main body 1 is the core component of the mounting fixture. Its main function is to provide space for the tandem bearings and to restrict their radial position. Main body 1 is designed to stably support the tandem bearings.

[0025] End cap 2 is an auxiliary component of the installation fixture, which is detachably installed at the end of the main body 1. End cap 2 works in conjunction with the main body 1 to restrict the axial position of the tandem bearing and prevent axial displacement of the tandem bearing during installation.

[0026] The first main body and the second main body are two detachably connected components that constitute the main body 1. The main body 1 is formed by assembling these two parts. This split design facilitates the installation and removal of the tandem bearings, as well as the assembly and disassembly of the tooling itself.

[0027] This embodiment provides an installation fixture for a tandem bearing, whose structure mainly consists of a main body 1 and an end cap 2. The main body 1 is designed to support the tandem bearing and restrict its radial position. The end cap 2 is detachably installed at the end of the main body 1 and works in conjunction with the main body 1 to restrict the axial position of the tandem bearing. This combined structure allows the tandem bearing to be effectively fixed during installation, preventing unnecessary radial and axial displacement.

[0028] The purpose of the main body 1 is to provide a stable mounting platform for the tandem bearing. For example, the main body 1 can be made into a cylindrical structure with an inner cavity in which the tandem bearing is placed. The inner diameter of the inner cavity can match the outer diameter of the tandem bearing, thereby achieving radial restraint on the tandem bearing. In another implementation, the inner wall of the main body 1 can be provided with multiple restraining blocks, which are distributed along the circumference to jointly support and restrain the outer circumference of the tandem bearing.

[0029] End cap 2 is designed to be detachably mounted on the end of body 1. For example, end cap 2 can be connected to the end of body 1 via a threaded connection, and its fastening or disengagement from body 1 can be achieved by rotating end cap 2. In another implementation, end cap 2 can be connected to body 1 via a mechanical connection such as a pin or snap-fit, thereby achieving quick installation and disassembly. End cap 2 cooperates with body 1 to jointly limit the axial movement of the tandem bearing; for example, the inner side of end cap 2 can form a plane that contacts the end face of the tandem bearing after end cap 2 is installed, thereby restricting the axial movement of the tandem bearing.

[0030] The structural feature of the main body 1 is that it is formed by detachably connecting a first main body part and a second main body part. For example, the main body 1 can be divided into two semi-cylindrical first main body parts and a second main body part along its axial direction. These two main body parts can be connected by fasteners such as bolts and screws. When installing or removing the tandem bearing, these two main body parts can be easily separated, so that the tandem bearing can be removed from or inserted into the main body 1.

[0031] This embodiment provides an installation fixture for tandem bearings. The main body 1 radially limits the tandem bearings, while a detachable end cap 2, in conjunction with the main body 1, axially limits the tandem bearings. The main body 1 is formed by the detachable connection of a first main body portion and a second main body portion. Therefore, this fixture simplifies the installation process of tandem bearings, improves assembly efficiency, and effectively avoids cumulative errors that may result from manual operation, thereby ensuring the installation accuracy and assembly quality of the tandem bearings, and ultimately improving the working stability and service life of the screw drill drive shaft assembly.

[0032] In some embodiments described above in this application, the main body 1 is formed by assembling a detachably connected first main body portion and a second main body portion, used to house and radially limit the tandem bearing. However, in its implementation, ensuring that the first main body portion and the second main body portion can be reliably and securely connected after assembly, while facilitating disassembly and installation, is a problem that needs to be solved.

[0033] In this application, it is further proposed that both the first and second main body portions are provided with connecting posts 13 and connecting members 14. Specifically, the connecting post 13 is typically a columnar structure fixed to the first or second main body portion, serving as a fixing point for snap-fit ​​engagement. The connecting member 14 is a rotatable component, also mounted on the first or second main body portion, and has snap-fit ​​holes 15 on its interior or surface that engage with the connecting post 13. The snap-fit ​​hole 15 is an opening on the connecting member 14, the shape and size of which are designed to match the connecting post 13, so that the connecting post 13 can smoothly engage with the snap-fit ​​hole 15 and be effectively locked. By rotating the connecting member 14, the snap-fit ​​hole 15 engages with the connecting post 13, thereby locking the first and second main body portions. This rotational snap-fit ​​mechanism allows the operator to simply rotate the connecting member 14 after the first and second main body portions are assembled, so that the snap-fit ​​hole 15 and the connecting post 13 can form a tight fit, thereby achieving quick and reliable locking of the two parts.

[0034] Through the above technical solution, the connection stability between the first and second main body parts in the tandem bearing installation fixture is significantly improved. The cooperation of the connecting column 13, the connecting piece 14, and the snap-fit ​​hole 15 provides a simple and efficient locking method. Assembly and disassembly of the main body 1 can be completed simply by rotating the connecting piece 14, greatly improving the efficiency of the fixture. At the same time, this stable snap-fit ​​ensures the radial limiting accuracy and axial stability of the tandem bearing during installation, guaranteeing smooth installation operations and long-term reliable operation of the fixture.

[0035] This application further proposes that an "L"-shaped groove 21 is provided on the outer surface of the end cover 2, and a locking block 12 is provided on both the first main body and the second main body to cooperate with the groove 21; after the locking block 12 is inserted into the groove 21, it can slide along its horizontal section to lock the end cover 2 axially onto the main body 1.

[0036] Specifically, the "L"-shaped slot 21 is a groove with a specific geometry, typically consisting of a vertical section and a horizontal section communicating with the end of the vertical section. This slot 21 is formed on the outer surface of the end cap 2, and its function is to provide a track for insertion and sliding of the locking block 12 on the main body 1. This shape design allows the locking block 12 to be inserted vertically first and then slid horizontally, thereby achieving locking. The dimensions and depth of the slot 21 should match the locking block 12 to ensure a tight fit and smooth sliding between them. The slot 21 can be formed during the manufacturing process of the end cap 2 by methods such as milling, casting, or integral molding.

[0037] The locking block 12 is a protruding structure provided on the main body 1 (specifically, the first main body and the second main body), and its shape and size are adapted to the "L"-shaped locking groove 21 on the end cap 2. The function of the locking block 12 is to cooperate with the locking groove 21 to achieve axial locking of the end cap 2 through insertion and sliding. The locking block 12 can be integrally formed with the main body, for example, by casting or machining, or it can be manufactured separately and fixed to the main body by welding, bolting, or other methods. The locking blocks 12 are provided on both the first and second main bodies to ensure that the end cap 2 can be evenly and securely locked from multiple points when it is assembled with the main body 1, thereby improving the reliability of the connection.

[0038] When the end cap 2 is placed at the end of the body 1, the locking block 12 first aligns and inserts into the vertical section of the "L"-shaped slot 21. Once the locking block 12 is fully inserted, the end cap 2 or the body 1 can be rotated relative to each other at an angle, causing the locking block 12 to move from the vertical section to the horizontal section of the slot 21. Within the horizontal section, the locking block 12 is restrained by the wall of the slot 21, thereby preventing the end cap 2 from axially disengaging from the body 1. This sliding locking method provides reliable axial restraint while allowing for quick unlocking and removal of the end cap 2 by reverse operation (rotation and pull-out) when needed.

[0039] Through the above technical solution, an "L"-shaped groove 21 is formed on the outer surface of the end cap 2, and both the first and second main bodies are provided with locking blocks 12 that cooperate with the groove 21. When the locking block 12 is engaged in the groove 21, it slides along the horizontal section of the groove 21 by relative rotation, thereby axially locking the end cap 2 onto the main body 1. This technical solution provides an intuitive, convenient, and reliable method for axial locking of the end cap. The operator only needs to align the end cap 2 with the main body 1, insert the locking block 12, and then perform a simple rotation operation to complete the locking, avoiding the cumbersome operation and tool dependence that may be caused by traditional bolt fixing methods. At the same time, this snap-locking structure can ensure that the end cap 2 maintains a stable axial position during operation, effectively preventing axial displacement of the tandem bearing during installation, thereby improving the stability and operational efficiency of the installation fixture. In addition, this locking method also facilitates quick unlocking and disassembly of the end cap 2, providing convenience for the maintenance of the fixture and the replacement of the bearing.

[0040] In some embodiments described above in this application, a mounting fixture for tandem bearings is proposed. Its main body 1 is formed by detachably connecting a first main body portion and a second main body portion, and works in conjunction with an end cap 2 to radially and axially limit the tandem bearings. However, with only external limiting provided, the initial placement and positioning of the tandem bearings within the mounting fixture may lack sufficient precision and stability, especially in terms of its bottom support and precise radial and axial positioning. This can lead to slight offsets or tilts of the bearings during assembly, thereby affecting the final installation accuracy and product performance.

[0041] In this regard, this application further proposes that the first and second main body portions, when joined together, form a receiving cavity for accommodating the tandem bearing. This receiving cavity is the main space inside the mounting fixture for supporting and enclosing the tandem bearing, and its shape and size are generally matched to the outer shape of the tandem bearing to ensure that the tandem bearing can be smoothly placed within it. Simultaneously, the main body 1 is provided with a lower positioning portion for positioning the tandem bearing. The lower positioning portion aims to provide stable bottom support and precise initial positioning for the tandem bearing, preventing unnecessary radial or axial movement of the tandem bearing during installation. Specifically, the lower positioning portion is a stepped hole integrally formed on the lower surface of the first and second main body portions. This stepped hole is formed through precision machining, and its stepped structure can match the outer diameter of the tandem bearing, thereby providing precise bottom positioning of the tandem bearing in both radial and axial directions. When the first and second main body portions are joined together, the semi-circular stepped structures on their respective lower surfaces will precisely align, forming a complete stepped hole, providing a robust and accurate support surface for the tandem bearing. This one-piece molding design ensures the structural strength and positioning accuracy of the lower positioning part, avoiding positioning inaccuracies caused by component assembly errors.

[0042] Through the above technical solution, when the tandem bearing is placed in the receiving cavity formed by the first main body and the second main body, the stepped hole integrally formed on the lower surface of the first and second main bodies can accurately support the bottom of the tandem bearing and perform initial radial and axial positioning. This design effectively solves the problem of inaccurate initial positioning of the tandem bearing in the installation fixture, ensuring the stability and accuracy of the tandem bearing in subsequent installation operations. The lower positioning part is the stepped hole integrally formed with the main body 1. Its structure is stable and its positioning accuracy is high, which can effectively prevent the tandem bearing from tilting or shifting during placement and subsequent operations, thereby significantly improving the installation efficiency and final assembly quality of the tandem bearing.

[0043] This application further proposes that the end cap 2 is provided with an upper positioning part for positioning the tandem bearing. The upper positioning part is a stepped hole II formed inside the end cap 2. The stepped hole II includes a groove section that matches the outer diameter of the tandem bearing and a through hole section that matches the inner diameter of the tandem bearing. This upper positioning part is specifically designed to cooperate with the upper structure of the tandem bearing to achieve precise axial positioning. Its function is to apply a stable positioning and limiting effect to the tandem bearing from above after the tandem bearing is placed inside the main body 1, through the installation of the end cap 2, to ensure its accurate axial position.

[0044] Specifically, the upper positioning part is designed as a stepped hole II formed inside the end cap 2. The stepped hole II is a graded hole structure with different diameters or depths, its inner surface facing the tandem bearing. This structure provides multiple contact surfaces, thereby achieving finer and more stable positioning of the tandem bearing. For example, the stepped hole II can be formed on the inner surface of the end cap 2 by precision machining, casting, or integral molding.

[0045] The stepped bore 2 includes a grooved section that matches the outer diameter of the tandem bearing and a through-hole section that matches the inner diameter of the tandem bearing. The inner diameter of the grooved section is adapted to the outer diameter of the tandem bearing, allowing it to fit tightly onto the outer ring of the tandem bearing when the end cap 2 is installed, providing radial restraint and axial support. The inner diameter of the through-hole section is adapted to the inner diameter of the tandem bearing, facilitating its installation.

[0046] This application further proposes that both the first main body and the second main body include an upper ring portion and a lower ring portion, which are connected by at least two connecting rods 16.

[0047] The upper and lower annular sections form the upper and lower ends of the first and second main bodies, providing basic frame support for the entire fixture. These two annular sections are typically ring structures with a certain thickness and width, and their inner and outer diameters match the overall dimensions of the main body 1 and the dimensions of the tandem bearings to be accommodated. Their main function is to provide structural support and serve as the fixed end points of the connecting rod 16, ensuring that the main body 1, after assembly, can form a stable cavity with good concentricity to accurately accommodate and limit the tandem bearings.

[0048] Connecting rod 16 is a structural component that connects the upper and lower circular rings, fixing them together to form the basic framework of the first and second main bodies. The presence of at least two connecting rods 16 ensures spatial stability of the structure, preventing relative rotation or displacement of the circular rings. Connecting rods 16 can take various forms, such as solid or hollow cylindrical rods, and their material is typically the same as other parts of the main body 1 to ensure overall strength and rigidity. Connection methods can include welding, bolting, riveting, or integral molding. Through the connecting rods 16, the first and second main bodies form a robust semi-circular or fan-shaped structure within themselves, which, when joined, together constitutes a complete and stable main body 1.

[0049] The distance between any two adjacent connecting rods 16 on the first main body and the second main body is less than the outer diameter of the tandem bearing, and the inscribed circle diameter of the plurality of connecting rods 16 is the same as the outer diameter of the tandem bearing.

[0050] When the first and second main body parts are assembled to form the main body 1, the space enclosed by the connecting rods 16 inside is used to place the tandem bearing. The minimum radial distance between any two adjacent connecting rods 16 is designed to be less than the outer diameter of the tandem bearing to be installed. This design ensures that when the tandem bearing is placed into the tooling, its outer circumference will inevitably contact the inner surface of at least one connecting rod 16, thus being initially restricted in the radial direction. The inscribed circle diameter of the multiple connecting rods 16 refers to the diameter of the imaginary circle formed by the inner surfaces of all the connecting rods 16. When this inscribed circle diameter is precisely designed to be the same as the outer diameter of the tandem bearing, it means that when the tandem bearing is placed inside the tooling, its outer circumference will be in close contact with the inner surfaces of all the connecting rods 16. For example, if the connecting rods 16 are cylindrical, their centers can be evenly distributed on a circumference corresponding to the outer diameter of the tandem bearing, and the sum of the radius of the connecting rod 16 and the radius of this circumference is exactly equal to the radius of the tandem bearing.

[0051] Through the above technical solution, when the first and second main bodies are assembled, multiple connecting rods 16 work together to form a radial limiting structure that precisely matches the outer diameter of the tandem bearing. The distance between any two adjacent connecting rods 16 is less than the outer diameter of the tandem bearing, effectively preventing the tandem bearing from moving freely or wobbling in the radial direction. Simultaneously, the inscribed circle diameter of the multiple connecting rods 16 is the same as the outer diameter of the tandem bearing, ensuring that the tandem bearing is tightly surrounded in the radial direction, achieving high-precision radial positioning. This significantly improves the positioning accuracy and stability of the tandem bearing in the installation fixture, enhancing installation efficiency and reliability.

[0052] This application further proposes that two hooks 22 for connecting lifting devices are provided on the upper end face of the end cap 2.

[0053] End cap 2 is an important component of the mounting fixture, and its main function is to work in conjunction with the main body 1 to axially limit the tandem bearings. Its upper surface refers to the top surface of end cap 2 facing the external environment when the mounting fixture is assembled and in normal working condition. This surface is typically an accessible and easily operable area.

[0054] Hook 22 is a structural component used to connect external lifting equipment. Its design typically includes one or more openings or ring-shaped sections to allow lifting devices (such as crane hooks, slings, chains, etc.) to be reliably inserted or hooked. The material and structural strength of hook 22 should be sufficient to withstand the total weight of the installation fixture and its internal tandem bearings, providing a certain safety margin. It can take various forms, such as fixed lifting rings, rotatable lifting rings, U-bolts, etc., with the specific form selected based on actual lifting requirements and load-bearing capacity.

[0055] Through the above technical solution, two hooks 22 for connecting lifting tools are provided on the upper surface of the end cover 2, providing a convenient and safe lifting interface for the installation fixture of the tandem bearing. When the installation fixture needs to be moved, lifted or docked with other equipment, the operator can directly connect the lifting tool to the two hooks 22, thereby achieving stable and efficient lifting and movement.

[0056] The above technical solution is further illustrated by the following examples: In use, the main body 1 of the tandem bearing mounting fixture is first assembled. The main body 1 is formed by assembling a detachably connected first main body and a second main body. The first and second main bodies are aligned so that the connecting posts 13 on both bodies engage with the snap-fit ​​holes 15 on the connector 14. By rotating the connector 14, the snap-fit ​​holes 15 engage with the connecting posts 13, thereby firmly locking the first and second main bodies together to form a complete receiving cavity for accommodating the tandem bearing. This modular design allows the tandem bearing to be easily installed from one side, avoiding the inconvenience of traditional one-piece fixtures when loading large or multi-row bearings, and significantly improving loading efficiency.

[0057] The cavity formed after the main body 1 is closed has a lower positioning part for positioning the tandem bearing. This lower positioning part is a stepped hole integrally formed on the lower surface of the first and second main bodies. When the tandem bearing is smoothly placed into the cavity, the outer diameter of the tandem bearing precisely matches the inner diameter of the stepped hole, ensuring the initial accurate positioning of the tandem bearing in the radial and axial directions. At the same time, the inner wall of the main body 1, especially the upper and lower annular portions included in both the first and second main bodies, is connected by at least two connecting rods 16. The inscribed circle diameter of these connecting rods 16 is the same as the outer diameter of the tandem bearing, and the distance between any two adjacent connecting rods 16 is less than the outer diameter of the tandem bearing, thereby providing comprehensive and stable radial positioning of the tandem bearing and preventing any radial displacement during installation. Compared with the traditional manual installation method that requires repeated adjustments of the bearing position to ensure coaxiality, this tooling achieves high-precision radial positioning in one step through a mechanical structure.

[0058] After the tandem bearing is positioned and radially limited, the end cap 2 is installed. The end cap 2 has an upper positioning part for positioning the tandem bearing, which is a stepped hole two formed inside the end cap 2. The stepped hole two includes a groove section matching the outer diameter of the tandem bearing and a through hole section matching the inner diameter of the tandem bearing. The end cap 2 is placed at the end of the main body 1, so that the stepped hole two precisely mates with the top of the tandem bearing, further limiting and locking the axial direction of the tandem bearing.

[0059] To reliably fix the end cap 2 to the main body 1, the "L"-shaped groove 21 on the outer surface of the end cap 2 and the locking blocks 12 provided on both the first and second main body portions can be utilized. Align the locking block 12 with the vertical section of the "L"-shaped groove 21 and insert it. Then, rotate the end cap 2, causing the locking block 12 to slide along the horizontal section of the "L"-shaped groove 21. This rotational action axially locks the end cap 2 to the main body 1, forming a compact and stable installation unit. This quick-locking method greatly simplifies the operation steps and shortens the installation time compared to traditional bolt fixing.

[0060] After the tandem bearings are precisely installed and locked within the fixture, a lifting device can be connected using the two hooks 22 on the upper surface of the end cover 2 to lift the entire installation fixture along with the internal tandem bearings and precisely install them into the designated position on the drive shaft assembly. Because the tandem bearings have already achieved high-precision radial and axial positioning within the fixture, the entire installation process becomes fast, accurate, and reliable, effectively avoiding the cumulative error problems common in manual installation and ensuring the assembly quality and subsequent operational stability of the drive shaft assembly. This integrated installation method significantly improves assembly efficiency and meets the dual requirements of high efficiency and high precision for large-scale production.

[0061] The terms “first” and “second” are used to distinguish similar objects, rather than to describe or indicate a specific order or sequence.

[0062] The term "comprising" or any other similar term is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent in such process, method, article, or apparatus / device.

[0063] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A mounting fixture for tandem bearings, characterized in that, include: The main body (1) is used to place the tandem bearings and limit the radial direction of the tandem bearings; as well as End cap (2) is detachably installed at the end of the main body (1) and works with the main body (1) to limit the axial movement of the tandem bearing; The main body (1) is formed by detachably connecting a first main body part and a second main body part.

2. The mounting fixture for tandem bearings according to claim 1, characterized in that, The first main body and the second main body are each provided with a connecting post (13) and a connecting member (14); the connecting member (14) is provided with a snap-fit ​​hole (15) that engages with the connecting post (13); by rotating the connecting member (14), the snap-fit ​​hole (15) engages with the connecting post (13) to lock the first main body and the second main body.

3. The mounting fixture for tandem bearings according to claim 1, characterized in that, The outer surface of the end cap (2) is provided with an "L" shaped slot (21), and both the first main body and the second main body are provided with a locking block (12) to cooperate with the slot (21); after the locking block (12) is inserted into the slot (21), it can slide along its horizontal section to lock the end cap (2) axially onto the main body (1).

4. The mounting fixture for tandem bearings according to claim 3, characterized in that, The "L"-shaped slot (21) includes a vertical section and a horizontal section connecting the end of the vertical section; the card block (12) is adapted to be inserted into the slot (21) along the vertical section, and the card block (12) is slid along the horizontal section by rotating the end cap (2) to achieve axial locking between the end cap (2) and the body (1).

5. The mounting fixture for tandem bearings according to claim 1, characterized in that, The first main body and the second main body together form a receiving cavity for accommodating the tandem bearing. The main body (1) is provided with a lower positioning part for positioning the tandem bearing. The lower positioning part is a stepped hole integrally formed on the lower surface of the first main body and the second main body.

6. The mounting fixture for tandem bearings according to claim 1, characterized in that, The end cap (2) is provided with an upper positioning part for positioning the tandem bearing. The upper positioning part is a stepped hole II opened on the inner side of the end cap (2). The stepped hole II includes a groove section that matches the outer diameter of the tandem bearing and a through hole section that matches the inner hole of the tandem bearing.

7. The mounting fixture for tandem bearings according to claim 1, characterized in that, The first main body and the second main body each include an upper ring and a lower ring, which are connected by at least two connecting rods (16).

8. The mounting fixture for tandem bearings according to claim 7, characterized in that, The distance between any two adjacent connecting rods (16) on the first main body and the second main body is less than the outer diameter of the tandem bearing, and the inner circle diameter of the plurality of connecting rods (16) is the same as the outer diameter of the tandem bearing.

9. The mounting fixture for tandem bearings according to claim 1, characterized in that, The upper surface of the end cap (2) is provided with two hooks (22) for connecting the lifting device.

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