Adjustable bearing space ring

Abstract

The utility model discloses an adjustable bearing space ring, which belongs to the technical field of petroleum drilling and production and comprises an inner space ring and an outer space ring, an annular boss is coaxially connected onto the inner space ring, external threads are arranged on the outer wall of the annular boss, an annular groove is arranged on the outer surface of the lower portion of the annular boss, holes distributed at intervals are arranged on the annular groove, and the outer space ring is of an annular structure. An inner hole is formed in one end of the outer space ring, internal threads are arranged on the inner wall of the inner hole, and the circular ring boss is connected into the inner hole through the external threads and the internal threads. According to the adjustable bearing space ring, the inner space ring and the outer space ring can form the adjustable bearing space ring through the pins, the length of the adjustable bearing space ring can be adjusted within the use range, the connection strength is guaranteed while different installation requirements are met, the structural design is simple, installation, disassembly and adjustment are convenient, and later maintenance is convenient.

Description

Technical Field

[0001] This utility model belongs to the field of petroleum drilling and production technology, and specifically relates to an adjustable bearing spacer. Background Technology

[0002] Bearing spacers, as key components in mechanical assembly, are primarily used to control the axial clearance and positioning accuracy of bearings. Their technological development closely follows the evolution of mechanical engineering and industrial equipment needs. Traditional bearing spacers mostly employ a fixed design, matching bearing installation requirements with standardized thicknesses, but this has significant limitations in practical applications:

[0003] Compatibility issues: The fixed spacer needs to be customized according to the bearing model, and cannot be adjusted flexibly, resulting in complicated assembly and high cost;

[0004] Insufficient precision: Mechanical vibration or wear may cause changes in the gap, and the fixed spacer is difficult to compensate dynamically, affecting the stability of the equipment;

[0005] Inconvenient maintenance: Replacing or adjusting the spacer requires disassembling the entire bearing system, resulting in long downtime and low efficiency.

[0006] With advancements in precision manufacturing and automation technologies, adjustable spacers have become a research hotspot. For example, the introduction of threaded adjustment structures (such as internal and external thread fits) allows for precise control of the clearance by adjusting the spacer thickness through rotation; while pin locking mechanisms (such as hexagonal set screws) further enhance stability after adjustment. Such designs demonstrate significant advantages in fields like industrial robots and high-precision machine tools, quickly adapting to different working conditions and reducing assembly errors. However, existing technologies still face challenges, such as thread wear under complex working conditions and maintaining adjustment accuracy over the long term.

[0007] Currently, technological innovations in adjustable bearing spacers focus on material strengthening (such as wear-resistant coatings), structural optimization (such as anti-loosening designs), and intelligent adjustment (such as sensor feedback systems), aiming to improve reliability and expand their application value in high-end equipment.

[0008] Chinese Patent CN200920256445.0 discloses a bearing spacer, including an outer spacer and an inner spacer. On one side of the bearing spacer, the outer and inner spacers are joined in a stepped manner. On the other side of the bearing spacer, a sealing ring is provided between the outer and inner spacers, and the sealing ring is engaged in a groove provided on the outer and inner spacers. By improving the joint between the inner and outer spacers, the bearing spacer has a sealing function, which is very practical, reduces the corrosion of bearings and other components by harmful liquids, and saves maintenance costs.

[0009] Chinese Patent CN202222829849.2 discloses a bearing spacer with an oil injection hole, comprising: a spacer body, a blind hole radially formed on the outer side of the spacer body, a first groove axially formed at one end of the spacer body, and an oil injection hole formed in the first groove. The oil injection hole is located radially close to the position of the bearing rolling element nearby, and one end of the oil injection hole is connected to the blind hole. This invention provides a bearing spacer with an oil injection hole structure, particularly suitable for bearing lubrication in speed reducers. It facilitates the entry of lubricating oil into the bearing raceway and sprays it onto the bearing rolling elements, achieving good lubrication and promptly removing heat generated by bearing rotation. This bearing spacer has a simple structure and strong practicality, effectively improving the lubrication and cooling of speed reducer bearings, thereby increasing the actual service life of the speed reducer bearings.

[0010] However, the above-mentioned patent still has the following drawbacks. For example, the length of the bearing spacer cannot be adjusted, which means that when the bearing is replaced during on-site maintenance, the bearing spacer must be replaced simultaneously, which increases the cost of use. In addition, the bearing spacer has a long production cycle, which leads to a long maintenance cycle and a corresponding increase in time costs. Utility Model Content

[0011] The purpose of this utility model is to provide an adjustable bearing spacer with adjustable length: the length can be adjusted within the usage range through threaded connection to meet different installation requirements, while the addition of a pin structure prevents the connection from loosening and ensures the connection strength.

[0012] To achieve the above objectives, the technical solution adopted by this utility model to solve the technical problem is as follows:

[0013] An adjustable bearing spacer includes an inner spacer and an outer spacer. The inner spacer has an annular structure and a circular boss coaxially connected to it. The inner diameter of the circular boss is equal to the inner diameter of the inner spacer, and the outer diameter of the circular boss is smaller than the outer diameter of the inner spacer. The bottom of the circular boss is fixedly connected to the top of the inner spacer. The outer wall of the circular boss has an external thread, and the lower outer surface of the circular boss has an annular groove with spaced holes. The outer spacer has an annular structure, and one end of the outer spacer has an inner hole with an inner diameter larger than that of the outer spacer. The inner wall of the inner hole has an internal thread, and the circular boss is connected to the inner hole via the external and internal threads.

[0014] Furthermore, the outer diameter of the inner spacer is 310.5 mm, and the height is 120 mm. The ratio of diameter to height is conducive to the uniform meshing of the internal and external threads, avoiding thread misalignment or jamming caused by an imbalance in the length-to-diameter ratio, and ensuring smooth adjustment.

[0015] Further specified, the outer diameter of the outer spacer is 310.5 mm, and the height is 120 mm. This reasonable dimensional design reduces material waste while meeting strength requirements, conforming to the cost control principles of industrial design.

[0016] Furthermore, the outer spacer ring is provided with a radial threaded hole, and a pin is connected inside the radial threaded hole. This facilitates the installation and removal of the pin, while also reducing the size and weight of the parts.

[0017] Furthermore, the pin is a hexagonal set screw. This prevents the inner and outer spacers from rotating relative to each other, thereby effectively preventing the connection from loosening.

[0018] Furthermore, the adjustable height of the inner and outer spacers is 193-197mm. This allows their length to be adjusted within the usable range to meet different installation requirements.

[0019] Further, the lower outer surface of the annular boss is provided with an annular groove, and the annular groove is provided with holes spaced apart.

[0020] The main advantages of utility models are:

[0021] 1. The threaded connection allows its length to be adjusted within the usage range to meet different installation requirements.

[0022] 2. Add a pin fixing structure to effectively prevent the threaded connection from loosening due to vibration and other factors.

[0023] 3. The structure is simple, easy to install, disassemble and adjust, and convenient for later maintenance. Attached Figure Description

[0024] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0025] Figure 1 This is a schematic diagram of the overall structure of an adjustable bearing spacer according to this utility model.

[0026] Figure 2 This is a schematic diagram of the structure of the inner spacer of an adjustable bearing spacer according to this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of the outer spacer of an adjustable bearing spacer according to this utility model.

[0028] Figure 4 This is a cross-sectional structural schematic diagram of an adjustable bearing spacer according to this utility model.

[0029] Figure 5 yes Figure 4 A magnified schematic diagram of the structure at point A in the middle.

[0030] Figure 6 This is a cross-sectional structural schematic diagram of the inner spacer of an adjustable bearing spacer according to this utility model.

[0031] Figure 7 This is a cross-sectional structural diagram of the inner and outer spacers of an adjustable bearing spacer according to this utility model.

[0032] The symbols for the main components are explained as follows: 1. Outer spacer; 2. Inner spacer; 3. Pin; 4. Internal thread; 5. Radial threaded hole; 6. Inner hole; 7. Circular boss; 8. External thread; 9. Hole. Detailed Implementation

[0033] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] like Figure 1-7 As shown, this utility model discloses an adjustable bearing spacer, comprising an inner spacer 2 and an outer spacer 1. This utility model divides the original bearing spacer into two parts at the middle position: a main body (outer spacer 1) and an adjusting part (inner spacer 2). The inner spacer 2 has an annular structure with an outer diameter of 310.5 mm and a height of 120 mm. The ratio of the outer diameter to the height of the inner spacer 2 facilitates uniform meshing of the internal and external threads, avoiding thread misalignment or jamming caused by an imbalance in the length-to-diameter ratio, and ensuring smooth adjustment. The outer spacer 1 has an outer diameter of 310.5 mm and a height of 120 mm. The reasonable dimensional design reduces material waste while meeting strength requirements, conforming to the cost control principles of industrial design. One end of the outer spacer 1 retains its original structure, while the other end is machined with an internal thread 4. Four radial threaded holes 5 are machined on the outer side near the threaded end, facilitating the installation and removal of the four pins 3, and also reducing the size and weight of the parts.

[0035] A circular boss 7 is coaxially connected to the inner spacer 2. The inner diameter of the circular boss 7 is equal to the inner diameter of the inner spacer 2, and the outer diameter of the circular boss 7 is smaller than the outer diameter of the inner spacer 2. The bottom of the circular boss 7 is fixedly connected to the top of the inner spacer 2. An external thread 8 is provided on the outer wall of the circular boss 7. One end of the inner spacer 2 retains its original structure, while the other end is machined with an external thread 8 that matches the internal thread 4 of the main body. This structure allows the bearing spacer length to be adjustable, improves the connection strength between the outer spacer 1 and the inner spacer 2, prevents loosening of the connection, and facilitates operation and maintenance.

[0036] The outer spacer 1 has an annular structure. One end of the outer spacer 1 has an inner hole 6, the inner diameter of which is larger than that of the outer spacer 1. The inner wall of the inner hole 6 has an internal thread 4. A circular boss 7 is connected to the inner hole 6 via external threads 8 and internal threads 4, thus threading the inner spacer 2 to the outer spacer 1. The lower outer surface of the circular boss 7 has an annular groove with spaced holes 9, totaling 40 holes evenly distributed on the annular surface. The thread pitch is used to adjust the axial length by increasing (or decreasing) by 5 threads per hole per revolution, allowing the length to be adjusted within the usable range to meet different installation requirements. The inner spacer 2 and outer spacer 1 are fixed together by a pin 3 to prevent relative rotation and effectively prevent loosening of the connection. The adjustable height of the inner spacer 2 and outer spacer 1 is 193-197mm, allowing the length to be adjusted according to different situations to meet various installation requirements.

[0037] The main advantages of utility models are:

[0038] 1. The threaded connection allows its length to be adjusted within the usage range to meet different installation requirements.

[0039] 2. Add a pin fixing structure to effectively prevent the threaded connection from loosening due to vibration and other factors.

[0040] 3. The structure is simple, easy to install, disassemble and adjust, and convenient for later maintenance.

[0041] The above provides a detailed description of an adjustable bearing spacer provided by this utility model. The specific embodiments are described only to aid in understanding the method and core concept of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. An adjustable bearing spacer, characterized in that: The device includes an inner spacer (2) and an outer spacer (1). The inner spacer (2) is an annular structure. A circular boss (7) is coaxially connected to the inner spacer (2). The inner diameter of the circular boss (7) is equal to the inner diameter of the inner spacer (2), and the outer diameter of the circular boss (7) is smaller than the outer diameter of the inner spacer (2). The bottom of the circular boss (7) is fixedly connected to the top of the inner spacer (2). An external thread (8) is provided on the outer wall of the circular boss (7). The lower outer surface of the annular boss (7) is provided with an annular groove, and the annular groove is provided with holes (9) spaced apart. The outer spacer (1) is an annular structure. One end of the outer spacer (1) is provided with an inner hole (6). The inner diameter of the inner hole (6) is larger than the inner diameter of the outer spacer (1). The inner wall of the inner hole (6) is provided with an internal thread (4). The annular boss (7) is connected in the inner hole (6) through the external thread (8) and the internal thread (4).

2. The adjustable bearing spacer as described in claim 1, characterized in that: The outer diameter of the inner spacer (2) is 310.5 mm and the height is 120 mm.

3. An adjustable bearing spacer as described in claim 1, characterized in that: The outer diameter of the outer spacer (1) is 310.5 mm and the height is 120 mm.

4. An adjustable bearing spacer as described in claim 1, characterized in that: The outer spacer (1) is provided with a radial threaded hole (5), and a pin (3) is connected inside the radial threaded hole (5).

5. An adjustable bearing spacer as described in claim 4, characterized in that: The pin (3) is an internal hexagon set screw.

6. An adjustable bearing spacer as described in claim 1, characterized in that: The adjustable height of the inner spacer (2) and the outer spacer (1) is 193-197 mm.

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