A novel maintenance-free slewing bearing and its plastic oil separator

Abstract

This utility model discloses a novel maintenance-free slewing bearing and its plastic oil separator, comprising an outer ring, an inner ring, and a plug. The plug passes through the outer ring and is adjacent to the outer side of the inner ring. An separator is disposed between the plug and the inner ring, and a steel ball is disposed within the separator. The plug is fixed to the outer ring by a tapered pin. Sealing rubber is disposed at the upper and lower ends of the outer ring and the inner ring, respectively. It possesses excellent heat resistance and self-lubricating properties; it can be injection molded and is environmentally friendly and pollution-free; it can be mass-produced, reducing costs. It achieves maintenance-free operation during use, reducing after-sales maintenance costs and extending product lifespan.

Description

Technical Field

[0001] This utility model relates to the field of bearings, specifically a novel maintenance-free slewing bearing. Background Technology

[0002] Slewing bearings, also known as turntable bearings, are widely used in industry and are called "the joints of machines." They are essential transmission components for machinery that require relative rotational motion between two objects and must simultaneously withstand axial force, radial force, and overturning moment.

[0003] Slewing bearings have a wide range of applications, with engineering machinery being the earliest and most widely used application, such as tunnel boring machines, fans, earthmoving machinery, excavators, dismantling machines, stacker-reclaimers, graders, road rollers, dynamic compaction machines, rock drilling machinery, and tunneling machines. Other types include concrete machinery: concrete pump trucks, integrated concrete mixers and placing booms, belt placing booms; feeding machinery: disc feeders, sand mixers; lifting machinery: wheeled cranes, crawler cranes, gantry cranes, tower cranes, forklift cranes, crane-mounted cranes, gantry cranes; foundation treatment machinery: impact reverse circulation drilling rigs, rotary drilling rigs, impact rotary drilling rigs, rotary drilling rigs, reverse circulation rotary drilling rigs, forward circulation rotary drilling rigs, long spiral drilling rigs, submersible drilling rigs, static pressure pile drivers, pile drivers; engineering vessels: dredgers; special vehicles: bridge inspection vehicles, fire trucks, window cleaning machines, flatbed beam transport vehicles, aerial work platforms, self-propelled aerial work platforms; light industrial machinery: beverage machinery, bottle blowing machines, packaging machinery, filling machines, rotary bottle unscramblers, injection molding machines; marine cranes: equipment slewing platforms.

[0004] Slewing bearings experience the following challenges during operation: frequent lubrication leads to excessive sealing pressure and grease leakage, causing severe equipment contamination; excessively long lubrication intervals result in dry friction, causing pitting or wear and significantly reducing the slewing bearing's service life; dust, moisture, and metal particles enter the lubrication chamber through sealing gaps, accelerating wear between the rolling elements and raceways, thus causing premature slewing bearing failure. Lubrication points on some slewing bearings are difficult to access, requiring the disassembly of certain parts, further complicating the process. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a novel maintenance-free slewing bearing with excellent heat resistance and self-lubricating properties; it can be injection molded and is environmentally friendly and pollution-free; it can be mass-produced, reducing costs. It achieves maintenance-free operation during use, reducing after-sales maintenance costs and extending product lifespan.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A novel maintenance-free slewing bearing includes an outer ring, an inner ring, and a plug. The plug passes through the outer ring and is adjacent to the outer side of the inner ring. An isolation block is provided between the plug and the inner ring. A steel column is provided inside the isolation block. The plug is fixed to the outer ring by a tapered pin. Sealing rubber is provided at the upper and lower ends of the outer ring and the inner ring, respectively.

[0008] Further preferably, the isolation block is manufactured by injection molding.

[0009] Furthermore, the working surface of the isolation block is injection molded with plasticizing oil;

[0010] Further preferably, the isolation block has an open end and a concave arc-shaped structure around the middle.

[0011] Further preferably, the isolation block is shaped as an arc-shaped structure with open ends and a concave perimeter in the middle, and has several groove-shaped structures inside.

[0012] Further preferably, the isolation block is open at both ends, has a spherical structure inside, and has a perforated structure on the spherical surface.

[0013] Further preferably, the isolation block has an irregular shape.

[0014] In a further preferred embodiment, the plastic body oil is a polymer material in which saturated lubricating oil is adsorbed. The lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small portion of the lubricating oil slowly moves to the surface of the material under capillary action. When operation stops, the lubricating oil is re-adsorbed into the polymer and stored.

[0015] This utility model also provides a plastic oil separator block, the separator block being open at both ends, and the working surface of the separator block being injection molded or molded with plastic oil.

[0016] This utility model has the following beneficial effects:

[0017] This utility model discloses a novel maintenance-free slewing bearing and its plastic oil separator, which features excellent heat resistance and self-lubrication; it can be injection molded and is environmentally friendly and pollution-free; it can be mass-produced, reducing costs. It achieves maintenance-free operation during use, reducing after-sales maintenance costs and extending product lifespan. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figures 2-5 These are different embodiments of the present invention. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and relevant knowledge. Obviously, the described applications are only some embodiments of the present invention, and not all embodiments.

[0021] The present invention will be further described in detail below with reference to the accompanying drawings.

[0022] Example 1, referring to Figure 1 As shown, a novel maintenance-free slewing bearing includes an outer ring 1, an inner ring 4, and a plug 7. The plug 7 passes through the outer ring 1 and is adjacent to the outer side of the inner ring 4. A spacer block 5 is provided between the plug 7 and the inner ring 4, and a rear steel ball 3 is placed inside the spacer block 5. The plug 7 is fixed to the outer ring 1 by a tapered pin 6. Sealing rubber 2 is provided at the upper and lower ends of the outer ring 1 and the inner ring 4, respectively. This structure is a single-row four-point contact ball bearing, but this invention is also applicable to all other structural forms including double-row unequal diameter ball bearings, single-row crossed roller bearings, and three-row roller bearings, which contain various different spacer blocks.

[0023] The isolation block 5 is manufactured using injection molding. Further optimized, the working surface of the isolation block is injection-molded with a plasticizing oil. Specifically, the isolation block is first injection-molded, and then the plasticizing oil is injected into the two arc-shaped working surfaces of the isolation block substrate using injection molding or compression molding. (Refer to...) Figure 2 As shown, the shape of the isolation block 5 is an arc-shaped structure with open ends and a concave perimeter in the middle, containing several groove-like structures inside, which is a spherical isolation block (flower-shaped). (Refer to...) Figure 2 As shown, the working surface 8 is injected with plastic oil.

[0024] The lubrication principle of plastic body oil: Plastic body oil is a polymer material that adsorbs saturated lubricating oil. Based on surface tension, the lubricating oil is stored in the micropores within the polymer. During operation, a small portion of the lubricating oil slowly moves to the material surface under capillary action. When operation stops, the lubricating oil is re-adsorbed into the polymer and stored. No self-lubricating device is needed, and the lubricating oil can be stored after use, eliminating the need for continuous lubrication (unlike other powder lubricants which are constantly consumed, significantly reducing their lifespan). Plastic body oil lubricates the friction areas, and during continuous friction, the lubricating material remains within the friction area, ensuring the friction pair is always lubricated and under effective lubrication conditions, thus eliminating the need for additional lubrication and achieving a maintenance-free effect.

[0025] Example 2, refer to Figure 3 As shown, the difference between this embodiment and embodiment 1 is that the shape of the isolation block 5 is an arc-shaped structure with open ends and a concave perimeter in the middle.

[0026] Example 3, referring to Figure 4As shown, the difference between this embodiment and embodiment 1 is that the interior of the isolation block is a spherical structure, and a perforated structure is provided on the surface of the sphere.

[0027] Example 4, refer to Figure 5 As shown, the difference between this embodiment and Embodiment 1 is that the isolation block is irregularly shaped.

[0028] In this invention, the outer ring 1 and inner ring 4 constitute the main support structure of the bearing, forming a raceway space. The plug 7 passes through the outer ring 1 and is adjacent to the outer side of the inner ring 4, fixed to the outer ring 1 by a tapered pin 6, restricting the axial movement of the inner ring. The separator 5 is located between the plug 7 and the inner ring 4, and contains rollers (or other rolling elements, such as steel balls) to separate and guide the movement of the rolling elements. Sealing rubber 2 is installed at the upper and lower ends of the outer ring 1 and inner ring 4 to prevent dust and moisture intrusion, and to avoid leakage of lubricating medium.

[0029] Applicable bearing types, basic structure: single-row four-point contact ball bearings. Extended applications: all structural forms including double-row unequal diameter ball bearings, single-row crossed roller bearings, and three-row roller bearings, possessing wide compatibility.

[0030] The innovative design of the isolation block and the plastic oil, the process characteristics of isolation block 5, injection molding process: the isolation block substrate is formed by injection molding in one step, which has high precision and is easy to mass production.

[0031] The integration method of the plastic body oil is a two-step injection molding process: first, the isolation block substrate is injection molded, and then the plastic body oil is injection molded or molded onto the two arc-shaped working surfaces (friction contact areas) of the substrate to ensure a strong bond. The composition and principle of the plastic body oil are also discussed.

[0032] Material characteristics: The polymer material adsorbs saturated lubricating oil, which is stored in the micropores inside the polymer by surface tension.

[0033] Lubrication mechanism: During operation: Lubricating oil slowly migrates to the material surface under capillary action, forming a lubricating film and reducing wear on friction pairs (such as steel balls and raceways). During shutdown: The lubricating oil is reabsorbed and stored by the polymer, preventing loss or damage.

[0034] Although some 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, and all such changes and alterations should fall within the scope of the present invention.

Claims

1. A new type of maintenance-free slewing ring bearing, characterized in that, It includes an outer ring, an inner ring, and a plug. The plug passes through the outer ring and is adjacent to the outer side of the inner ring. An isolation block is provided between the plug and the inner ring. A steel ball is provided inside the isolation block. The plug is fixed to the outer ring by a conical pin. Sealing rubber is provided at the upper and lower ends of the outer ring and the inner ring, respectively.

2. A new type of maintenance-free slewing ring bearing according to claim 1, characterized in that, The isolation block is manufactured by injection molding, and the slewing bearing is a single-row four-point contact ball bearing, a double-row differential ball bearing, a single-row cross roller bearing, or a three-row roller bearing.

3. A new type of maintenance-free slewing ring bearing according to claim 2, characterized in that, The working surface of the isolation block is injection molded or molded with plastic oil.

4. The novel maintenance-free slewing bearing according to claim 1, characterized in that, The isolation block is open at both ends and has a concave arc-shaped structure around the middle.

5. A novel maintenance-free slewing bearing according to claim 1, characterized in that, The isolation block is open at both ends, with a concave arc-shaped structure around the middle, and has several groove-like structures inside.

6. A novel maintenance-free slewing bearing according to claim 1, characterized in that, The isolation block is open at both ends, has a spherical structure inside, and has a perforated structure on the spherical surface.

7. A novel maintenance-free slewing bearing according to claim 3, characterized in that, The plastic oil is a polymer material in which saturated lubricating oil is adsorbed. The lubricating oil is stored in the micropores inside the polymer based on surface tension. During operation, a small portion of the lubricating oil slowly moves to the surface of the material under capillary action. When operation stops, the lubricating oil is re-adsorbed into the polymer and stored.

8. A plastic oil separator block, characterized in that, The working surface of the isolation block is injection molded or molded with plastic oil.

9. A plastic oil separator block according to claim 8, characterized in that, The isolation block is open at both ends, with a concave arc-shaped structure around its center.

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