Integrated bearing assembly for escalator

Abstract

Two rows of deep groove ball bearings and a central spindle are integrated, outer rings of the two rows of deep groove ball bearings are integrally arranged, inner rings of the two rows of deep groove ball bearings and the central spindle are integrally arranged, two outer ring raceways are arranged on the inner surfaces of the outer rings in parallel, and the two outer ring raceways are arranged in parallel. The outer surface of the inner ring is correspondingly provided with two inner ring raceways, a row of steel balls are arranged between each outer ring raceway and the corresponding inner ring raceway, each row of steel balls are arranged on a retainer, grease is filled between the outer ring and the inner ring, two axial sides of the two rows of deep groove ball bearings are respectively provided with a sealing ring, and the two rows of deep groove ball bearings are respectively provided with a sealing ring. And the outer lip and the inner lip of each sealing ring are respectively in contact sealing fit with the inner surface of the outer ring and the outer surface of the inner ring. According to the bearing assembly, two sealing rings and the press-fitting procedure of a user are omitted, the bearing assembly is convenient for the user to install and use, has higher rotating precision, lower friction torque, lighter weight and longer service life, and can better meet the requirements of the user.

Description

Technical Field

[0001] This utility model relates to a bearing, specifically to an integrated bearing assembly for escalators. Background Technology

[0002] As a key component of escalators, bearings typically consist of two standard single-row deep groove ball bearings mounted in series on a mandrel. The inner rings of the two bearings are interference-fitted with the mandrel, and a positioning step is designed on the mandrel to axially position the two bearings. Each bearing's basic structure includes an outer ring, inner ring, cage, steel balls, and two sealing rings. The cage is generally made of SPCC steel, and the bearing is filled with grease. Installation requires pressing the two bearings into the mandrel separately, a process that is relatively cumbersome and prone to damage. Furthermore, due to radial clearance and dimensional deviations between the two bearings, the rotational accuracy of the assembly after pressing is relatively low, resulting in a limited service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an integrated bearing assembly for escalators, which is convenient for users to install and use, and has higher rotational accuracy, lower frictional torque, lighter weight and longer service life, thus better meeting user needs.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an integrated bearing assembly for escalators, which integrates two rows of deep groove ball bearings and a spindle. The outer rings of the two rows of deep groove ball bearings are integrally formed, and the inner rings of the two rows of deep groove ball bearings are integrally formed with the spindle. The inner surface of the outer ring has two parallel outer ring raceways, and the outer surface of the inner ring has two corresponding inner ring raceways. A row of steel balls is installed between each outer ring raceway and the corresponding inner ring raceway. Each row of steel balls is mounted on a cage. Grease is filled between the outer ring and the inner ring. A sealing ring is provided on each side of the two rows of deep groove ball bearings along the axial direction. The outer lip of each sealing ring contacts and seals with the inner surface of the outer ring, and the inner lip of each sealing ring contacts and seals with the outer surface of the inner ring.

[0005] This utility model integrates two rows of deep groove ball bearings and a mandrel into a single bearing assembly structure. Compared to two ordinary standard single-row deep groove ball bearings connected in series on the mandrel, it reduces the number of two sealing rings and the user's pressing process, making it easier for users to install and use. Moreover, this bearing assembly has higher rotational accuracy, lower frictional torque, lighter weight, and longer service life, which can better meet user needs.

[0006] The outer raceway on the inner surface of the outer ring and the inner raceway on the outer surface of the inner ring can be machined in one step using a diamond roller dressing wheel after heat treatment to ensure the rotational accuracy and lifespan of the bearing assembly.

[0007] Preferably, the mandrel has mounting grooves on both ends in the circumferential direction for mounting the chain of the escalator.

[0008] Preferably, the outer diameter of the mandrel, excluding the mounting groove, is equal, and the radial outer surface of the mandrel transitions to the axial outer surface of the inner ring via a circular arc. This invention eliminates the need for a positioning step on the mandrel of the bearing assembly, which helps reduce weight, further reduces frictional torque, lowers the power consumption of the escalator motor, and achieves energy savings.

[0009] Preferably, the mandrel has a central hole in its middle, which extends through the mandrel axially. Designing a central hole further reduces the weight of the bearing assembly and also allows for a reduction in the mandrel's wall thickness, facilitating heat treatment.

[0010] Preferably, the cage is a nylon cage to achieve better weight reduction and facilitate the assembly of the bearing assembly.

[0011] Compared with the prior art, the present invention has the following advantages: The integrated bearing assembly for escalators integrates two rows of deep groove ball bearings and a spindle into one unit. Compared with two ordinary standard single-row deep groove ball bearings connected in series on the spindle, it reduces two sealing rings and the user's pressing process, making it more convenient for users to install and use. Moreover, the bearing assembly has higher rotational accuracy, lower frictional torque, lighter weight and longer service life, which can better meet the needs of users. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the bearing assembly for the integrated escalator in the embodiment.

[0013] Figure 1 The specific reference numerals in the attached figures are as follows:

[0014] 1-Outer ring, 11-Outer ring raceway, 2-Inner ring, 21-Inner ring raceway, 3-Mandrel, 31-Mounting groove, 32-Center hole, 4-Steel ball, 5-Nylon cage, 6-Grease, 7-Sealing ring, 71-Outer lip, 72-Inner lip. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Structures or components not limited in this invention employ conventional techniques in the art.

[0016] The integrated bearing assembly for escalators in the embodiment, such as Figure 1 As shown, the bearing assembly integrates two rows of deep groove ball bearings and a spindle. The outer rings 1 of the two rows of deep groove ball bearings are integrally formed, and the inner rings 2 of the two rows of deep groove ball bearings are integrally formed with the spindle 3. The inner surface of the outer ring 1 has two parallel outer ring raceways 11, and the outer surface of the inner ring 2 has two corresponding inner ring raceways 21. A row of steel balls 4 is installed between each outer ring raceway 11 and the corresponding inner ring raceway 21. Each row of steel balls 4 is mounted on a nylon cage 5. Grease 6 is filled between the outer ring 1 and the inner ring 2. A sealing ring 7 is provided on each side of the two rows of deep groove ball bearings along the axial direction. The outer lip 71 of each sealing ring 7 contacts and seals with the inner surface of the outer ring 1, and the inner lip 72 of each sealing ring 7 contacts and seals with the outer surface of the inner ring 2.

[0017] In this embodiment, mounting grooves 31 are respectively provided on both ends of the mandrel 3 in the circumferential direction. The mounting grooves 31 are used to install the chain of the escalator (not shown in the figure). The outer diameter of the part of the mandrel 3 other than the mounting grooves 31 is equal. The radial outer surface of the mandrel 3 is arc-shaped and transitions with the axial outer surface of the inner ring 2. A central hole 32 is provided in the middle of the mandrel 3. The central hole 32 is axially arranged through the mandrel 3.

[0018] In this embodiment, after the outer ring 1, inner ring 2, and mandrel 3 are quenched as a whole, the outer ring raceway 11 and inner ring raceway 21 are formed in one step using a diamond roller dressing wheel.

[0019] The aforementioned integrated escalator bearing assembly combines two rows of deep groove ball bearings and a spindle into one unit, increasing the internal space of the bearing by approximately 40%. This allows for greater grease injection, which in turn extends the bearing's lifespan. Furthermore, compared to two standard single-row deep groove ball bearings connected in series on the spindle, this assembly eliminates the need for two sealing rings and the user's pressing process, simplifying installation and use. The assembly also offers higher rotational accuracy, lower frictional torque, lighter weight, and longer service life, better meeting user needs.

Claims

1. A bearing assembly for an integrated escalator, characterized in that, This bearing assembly integrates two rows of deep groove ball bearings and a spindle. The outer rings of the two rows of deep groove ball bearings are integrally formed, and the inner rings of the two rows of deep groove ball bearings are integrally formed with the spindle. The inner surface of the outer ring has two parallel outer ring raceways, and the outer surface of the inner ring has two corresponding inner ring raceways. A row of steel balls is installed between each outer ring raceway and the corresponding inner ring raceway. Each row of steel balls is mounted on a cage. The space between the outer ring and the inner ring is filled with grease. A sealing ring is provided on each side of the two rows of deep groove ball bearings along the axial direction. The outer lip of each sealing ring contacts and seals with the inner surface of the outer ring, and the inner lip of each sealing ring contacts and seals with the outer surface of the inner ring.

2. The integrated bearing assembly for escalators according to claim 1, characterized in that, The mandrel has mounting grooves on both ends in the circumferential direction, which are used to install the chain of the escalator.

3. The integrated bearing assembly for escalators according to claim 2, characterized in that, The outer diameter of the portion of the mandrel other than the mounting groove is equal, and the radial outer surface of the mandrel transitions to the axial outer surface of the inner ring with a circular arc.

4. The integrated bearing assembly for an escalator according to claim 1, characterized in that, The mandrel has a central hole in its middle section, and the central hole extends through the axial direction of the mandrel.

5. The integrated bearing assembly for an escalator according to claim 1, characterized in that, The cage is a nylon cage.

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