A detachable rod end joint bearing

Abstract

The utility model belongs to joint bearing technical field, specifically speaking is a kind of detachable rod end joint bearing, including fixed subassembly, connecting component and bearing assembly;Fixed subassembly contains the fixed seat of installation slot, three threaded holes and thread groove, bolt is tightened bearing outer ring in threaded hole, and threaded rod is fixedly connected in thread groove;Connecting component contains connecting rod and one end integrally formed double-threaded threaded tube, threaded tube outer thread cooperates with thread groove, inner thread cooperates with threaded rod, and three are coaxial;Bearing assembly contains outer ring, inner ring, ball and retainer, ball is rollingly engaged between two circular arc grooves.The utility model realizes that each component can be detached, and damaged component can be replaced separately, reduces maintenance cost, improves assembly flexibility and transmission efficiency, shortens maintenance downtime, and is suitable for engineering machinery, automation equipment and other transmission scenes.

Description

Technical Field

[0001] This utility model relates to the field of spherical bearing technology, specifically a detachable rod end spherical bearing. Background Technology

[0002] As a key component in mechanical systems for transmitting power and motion, rod end bearings have the core function of supporting external loads while enabling low-friction relative rotation or angular displacement between rod-shaped components and fixed structures. This ensures the smoothness and stability of mechanical motion. Therefore, their structural design directly affects the operating efficiency, maintenance costs, and service life of the entire mechanical system. They are specifically used in connection scenarios requiring "oscillation + rotation" composite motion, such as engineering machinery, automated equipment, automotive transmission systems, and medical devices. They are particularly suitable for mechanical transmission structures where there are high requirements for component maintenance convenience, assembly flexibility, and cost control.

[0003] In current technology, the mainstream structure of rod end spherical plain bearings is mostly an integral, one-piece design. Its typical structure includes: a fixed base connected to an external fixed structure, a connecting rod connected to an external transmission rod, and a bearing core (including the outer ring, inner ring, balls, and cage) integrated between the fixed base and the connecting rod. To ensure connection strength and structural stability, existing integral rod end spherical plain bearings typically employ the following non-removable or difficult-to-remove design methods, leading to several technical defects in practical applications, as follows: The non-separable nature of the bearing core and mounting base in existing technologies means that the outer ring of the bearing is usually fixed to the mounting cavity of the mounting base through interference fit, welding, or permanent stamping, forming an inseparable integral structure. While this design can meet the basic load support requirements, it has significant drawbacks: when internal components of the bearing core, such as worn balls, broken cages, or decreased inner ring precision, fail, maintenance personnel cannot replace the damaged bearing core component individually because the outer ring and mounting base cannot be separated. Instead, the entire "mounted base + bearing core" assembly must be scrapped and replaced with a new bearing assembly. This not only wastes a large amount of intact mounting base material but also significantly increases equipment maintenance costs. Especially in large engineering machinery or high-precision equipment, the procurement cost of a single rod end bearing assembly is high, and frequent replacements of the entire assembly will impose a heavy economic burden on users. In existing technologies, the rigid connection between the connecting rod and the fixed seat often employs an integrated forging, welding, or single-thread irreversible locking structure. For example, after threaded connection, anti-loosening welding is used, and a non-removable anti-loosening nut is added. This design presents two major problems: First, the assembly and disassembly process is cumbersome, requiring specialized tools such as welding equipment and hydraulic disassembly tools. Furthermore, disassembly can easily cause irreversible damage to the threaded structure of the connecting rod or fixed seat, leading to secondary scrapping of the component. Second, it lacks flexibility. When the mechanical system needs to adjust the length of the transmission rod or replace the connecting rod with a different specification to adapt to different working conditions—such as adjusting the transmission stroke of the boom in construction machinery or replacing connecting rods with different loads in automated equipment—the existing structure cannot replace the connecting rod alone; only the entire rod end bearing can be replaced. This greatly limits the equipment's versatility and adaptability to working conditions, increasing the time and cost of equipment modification.

[0004] Therefore, a detachable rod end spherical bearing is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and solve the problems of high maintenance costs, low assembly flexibility, long equipment downtime, and resource waste caused by the current integral rod end spherical bearings, which are characterized by "the bearing core and the fixed seat being inseparable, the connecting rod and the fixed seat being rigidly connected, complex maintenance operations, and poor targeted component replacement", this utility model proposes a detachable rod end spherical bearing.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a detachable rod end joint bearing, including a fixing component, a connecting component and a bearing component.

[0007] The fixing component includes a fixing base with three threaded holes. Bolts are threaded into the threaded holes. A threaded groove is provided on one side of the fixing base, and a threaded rod is fixedly connected in the threaded groove.

[0008] The connecting assembly includes a connecting rod, one end of which is fixedly connected to a threaded tube, the outer and inner surfaces of which are both provided with threads.

[0009] The bearing assembly includes an outer bearing ring and an inner bearing ring. A first arc groove is formed on the inner side of the outer bearing ring, and a second arc groove is formed on the outer side of the inner bearing ring. Multiple balls are rolled together between the first and second arc grooves, and a cage is provided on each ball.

[0010] Preferably, the external thread of the threaded tube is engaged with the threaded groove thread, and the internal thread of the threaded tube is engaged with the threaded rod thread.

[0011] Preferably, the mounting base has a mounting groove, and the outer ring of the bearing is embedded in the mounting groove.

[0012] Preferably, the mounting groove of the fixing seat is connected to the threaded hole.

[0013] Preferably, the end of the bolt overlaps with the outer surface of the bearing outer ring.

[0014] Preferably, the threaded tube, threaded rod, and threaded groove are arranged coaxially.

[0015] Preferably, the connecting rod and the threaded tube are integrally formed.

[0016] The advantages of this utility model are: 1. This utility model, through its structural design of opening an installation groove in the fixed seat and tightening the outer ring of the bearing with bolts in the threaded hole, realizes the function of detachable separation of the bearing assembly and the fixed seat, and individual replacement of the bearing core components. It solves the problem that existing integral bearings require the scrapping of the fixed seat and the bearing as a whole when the bearing core is damaged, improves the targetedness of component replacement and resource utilization, and significantly reduces equipment maintenance costs.

[0017] 2. This utility model, through its structural design where threads are provided on both the outer and inner surfaces of the threaded tube, and the threaded tube, threaded rod, and threaded groove are coaxial, enables quick assembly and disassembly of the connecting and fixing components, while maintaining the coaxiality of the transmission after assembly and disassembly. This solves the problem in the prior art where the rigid connection between the connecting rod and the fixing seat leads to cumbersome assembly and disassembly and makes it impossible to flexibly replace connecting rods of different specifications. It improves assembly flexibility and transmission stability, and can adapt to the needs of different mechanical transmission conditions.

[0018] 3. This utility model, through its overall structural design that allows for the independent disassembly and maintenance of each component as needed, solves the problem of long downtime caused by disassembling peripheral transmission parts for maintenance of existing integrated bearings. This improves the convenience of maintenance operations and equipment operating efficiency, and shortens the equipment downtime maintenance cycle. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the detachable rod end joint bearing of this utility model; Figure 2This is a schematic diagram of the main sectional view of the detachable rod end joint bearing of this utility model. Figure 3 This is a schematic diagram of the fixing component structure of this utility model; Figure 4 This is a schematic diagram of the front sectional view of the fixing component of this utility model; Figure 5 This is a schematic diagram of the connection component of this utility model.

[0021] In the diagram: 1. Fixing assembly; 101. Fixing seat; 102. Threaded hole; 103. Bolt; 104. Threaded groove; 105. Threaded rod; 2. Connecting assembly; 201. Connecting rod; 202. Threaded tube; 3. Bearing assembly; 301. Bearing outer ring; 302. First arc groove; 303. Ball; 304. Cage; 305. Bearing inner ring; 306. Second arc groove. Detailed Implementation

[0022] 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 scope of protection of the present utility model.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail. This application discloses a detachable rod end spherical bearing. (Refer to...) Figures 1 to 5 A detachable rod end spherical bearing includes a fixing assembly 1, a connecting assembly 2, and a bearing assembly 3.

[0024] The fixing component 1 includes a fixing seat 101, which has three threaded holes 102. Bolts 103 are threaded into the threaded holes 102. A threaded groove 104 is provided on one side of the fixing seat 101. A threaded rod 105 is fixedly connected in the threaded groove 104. An installation groove is provided on the fixing seat 101. The outer ring of the bearing 301 is embedded in the installation groove. The installation groove of the fixing seat 101 communicates with the threaded holes 102. The end of the bolt 103 overlaps with the outer surface of the outer ring of the bearing 301.

[0025] The connecting component 2 includes a connecting rod 201, one end of which is fixedly connected to a threaded tube 202. The outer and inner surfaces of the threaded tube 202 are both threaded. The outer thread of the threaded tube 202 is threadedly engaged with the threaded groove 104, and the inner thread of the threaded tube 202 is threadedly engaged with the threaded rod 105. The threaded tube 202, the threaded rod 105, and the threaded groove 104 are coaxially arranged, and the connecting rod 201 and the threaded tube 202 are integrally formed.

[0026] The components are detachably fixed by "double thread engagement and bolt positioning". The threaded tube 202 of the connecting component engages with the threaded groove 104 and threaded rod 105 of the fixing component to form "double thread constraint", which not only ensures the connection strength, but also allows for quick disassembly by loosening the threads. The bolts 103 of the fixing component 1, which are evenly distributed in the threaded holes 102, directly overlap the outer surface of the bearing outer ring 301. The bearing outer ring 301 is fixed in the mounting groove of the fixing seat 101 by the pre-tightening force of the bolts 103, which prevents the bearing outer ring 301 from loosening. When disassembling, the bearing component 3 can be removed by simply loosening the bolts 103 without damaging the overall structure.

[0027] The bearing assembly 3 includes an outer bearing ring 301 and an inner bearing ring 305. The outer bearing ring 301 has a first arc groove 302 on its inner side, and the inner bearing ring 305 has a second arc groove 306 on its outer side. A plurality of balls 303 are rolled together between the first arc groove 302 and the second arc groove 306, and a cage 304 is provided on the balls 303.

[0028] The first arc groove 302 of the outer ring 301 and the second arc groove 306 of the inner ring 305 form a closed "rolling channel", which limits the movement trajectory of the ball 303 and supports a certain angle of angular displacement. The cage 304 evenly separates multiple balls 303 to prevent the balls from colliding and squeezing with each other, ensuring that each ball can roll independently in the arc groove, preventing jamming or uneven wear, and improving rotational smoothness.

[0029] Working principle: Installation of the fixed assembly 1 and the bearing assembly 3: The bearing outer ring 301 is embedded into the mounting groove of the fixed seat 101, ensuring that its position is centered. Three bolts 103 are screwed into the threaded holes 102, and the ends of the bolts overlap with the outer surface of the bearing outer ring 301 to achieve compression and fixation of the bearing outer ring, preventing it from falling off or shifting. The threaded rod 105 has been pre-fixed in the threaded groove 104 of the fixed seat, serving as a guide and support structure for the connecting assembly.

[0030] Connection of connecting component 2 and fixing component 1: The threaded tube 202 at the front end of the connecting rod 201 is screwed into the threaded groove 104 of the fixing seat. The external thread of the threaded tube 202 engages with the threaded groove 104 to achieve initial fixing. At the same time, the internal thread of the threaded tube 202 engages with the external thread of the threaded rod 105 to achieve double locking, thereby enhancing the stability and coaxiality of the connection.

[0031] Connection between bearing inner ring 305 and connecting rod 201: The other end of connecting rod 201 is usually connected to an external mechanism, while bearing inner ring 305 is fixed to connecting rod 201 or its extension to achieve rotational transmission.

[0032] When an external mechanism applies force or moves through the connecting rod 201, the inner ring 305 of the bearing rotates accordingly, and the balls 303 roll between the first arc groove 302 and the second arc groove 306, achieving low-friction and high-precision relative movement. The cage 304 ensures that the balls are evenly distributed, avoids mutual collisions, improves bearing life and smoothness of movement, and the fixed seat 101 is fixed to the base by bolts 103, providing a stable support foundation. Disassembly and maintenance: By rotating the threaded tube 202 in the reverse direction, the connecting component 2 can be removed from the fixed component 1. Loosening the bolt 103 allows the bearing outer ring 301 to be removed from the fixed seat, facilitating the replacement or maintenance of the bearing assembly. All threaded connections adopt a standard thread structure, making disassembly convenient and requiring no special tools.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A detachable rod end spherical bearing, characterized in that, include: The fixing component (1) includes a fixing seat (101), which has three threaded holes (102) and bolts (103) threaded in the threaded holes (102). A threaded groove (104) is provided on one side of the fixing seat (101), and a threaded rod (105) is fixedly connected in the threaded groove (104). The connecting component (2) includes a connecting rod (201), one end of which is fixedly connected to a threaded tube (202), and the outer and inner surfaces of the threaded tube (202) are both provided with threads; The bearing assembly (3) includes an outer ring (301) and an inner ring (305). A first arc groove (302) is provided on the inner side of the outer ring (301), and a second arc groove (306) is provided on the outer side of the inner ring (305). A plurality of balls (303) are rolled together between the first arc groove (302) and the second arc groove (306). A cage (304) is provided on the balls (303).

2. The detachable rod end joint bearing according to claim 1, characterized in that: The external thread of the threaded tube (202) is threaded to the threaded groove (104), and the internal thread of the threaded tube (202) is threaded to the threaded rod (105).

3. A detachable rod end joint bearing according to claim 1, characterized in that: The mounting base (101) has an installation groove, and the bearing outer ring (301) is embedded in the installation groove.

4. A detachable rod end joint bearing according to claim 3, characterized in that: The mounting groove of the fixed base (101) is connected to the threaded hole (102).

5. A detachable rod end joint bearing according to claim 1, characterized in that: The end of the bolt (103) overlaps with the outer surface of the bearing outer ring (301).

6. A detachable rod end joint bearing according to claim 1, characterized in that: The threaded tube (202), threaded rod (105), and threaded groove (104) are arranged coaxially.

7. A detachable rod end joint bearing according to claim 1, characterized in that: The connecting rod (201) and the threaded tube (202) are integrally formed.

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