Independent mounting and lubricating structure of speed reducer bearing

Abstract

An independent installation and lubrication structure of a speed reducer bearing comprises a shell of a speed reducer, a gear shaft installed in the shell and the bearing assembled on the gear shaft, and is characterized in that a bearing seat communicated with an inner cavity of the shell is fixed on the shell, the end portion of the gear shaft extends into the bearing seat, the bearing is assembled between the bearing seat and the gear shaft, and the gear shaft is fixed on the bearing seat. And a sealing piece is pressed between the gear shaft and the shell to seal and separate the inner cavity of the bearing seat from the inner cavity of the shell. The bearing can be independently lubricated, sufficient lubrication of the bearing is guaranteed, lubrication reliability of the bearing is improved, positioning reliability of the outer ring of the bearing is improved, the probability that the outer ring of the bearing creeps in the running process of the speed reducer is reduced, the abrasion rate of the bearing is reduced, the service life of the bearing is prolonged, and therefore the fault rate of the speed reducer is reduced. The operation reliability of the speed reducer is improved.

Description

Technical Field

[0001] This utility model relates to an independent mounting and lubrication structure for a reducer bearing, used for mounting and lubricating the end bearing of the gear shaft in a reducer. Background Technology

[0002] The reducer housing has bearing chambers corresponding to the gear shaft. Bearings are press-fitted into these chambers to support the gear shaft. However, lubricating oil, relying on splash lubrication, often fails to reach the bearings, leading to insufficient lubrication. To improve lubrication, some reducers incorporate oil collection grooves in the housing, connecting the bearing chambers to these grooves via oil channels. The collected oil is channeled into the bearing chambers through the oil channels to lubricate the bearings, improving lubrication efficiency. However, even with reduced oil levels and splash volume, inadequate lubrication remains a risk. Furthermore, to maximize transmission efficiency, reducers use low-viscosity lubricating oil. However, low-viscosity oil has poor adhesion to bearings, making the oil film more prone to breakage and resulting in higher wear rates. To increase load capacity, deep groove ball bearings are typically mounted on the gear shaft. For ease of assembly, these bearings often use a tight inner and loose outer fit, resulting in a small interference fit between the outer ring and the bearing housing. This inevitably leads to creep of the outer ring during reducer operation, accelerating wear and shortening the bearing's lifespan. Utility Model Content

[0003] The independent mounting and lubrication structure for the reducer bearing provided by this utility model forms independent lubrication for the bearing, ensuring sufficient lubrication, improving the lubrication reliability of the bearing, improving the positioning reliability of the bearing outer ring, reducing the probability of creep in the bearing outer ring during reducer operation, reducing the bearing wear rate, extending the bearing service life, thereby reducing the failure rate of the reducer and improving the operational reliability of the reducer.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An independent mounting and lubrication structure for a reducer bearing includes a reducer housing, a gear shaft mounted in the housing, and a bearing mounted on the gear shaft. The bearing housing is characterized by: a bearing seat fixed to the housing and communicating with the inner cavity of the housing; the end of the gear shaft extending into the bearing seat; the bearing being mounted between the bearing seat and the gear shaft; and a press-fit seal between the gear shaft and the housing to seal and separate the inner cavity of the bearing seat from the inner cavity of the housing.

[0006] Preferably, the housing has an assembly protrusion corresponding to the bearing seat, the inner end of the bearing seat is integrally formed with a connecting ring that abuts against the assembly protrusion, the connecting ring is fastened to the assembly protrusion by bolts, and the end of the gear shaft has a bearing positioning surface that abuts against the inner end of the bearing, the inner end face of the bearing abuts against the bearing positioning surface.

[0007] Preferably, the inner end face of the bearing housing extends into the mounting convex ring, and an annular positioning surface is formed on the housing that is axially aligned with the inner end face of the bearing housing. An inner convex ring is integrally formed on the gear shaft, located inside the bearing and radially aligned with the mounting convex ring. The seal is press-fitted between the mounting convex ring and the inner convex ring, with one end abutting against the inner end face of the bearing housing and the other end abutting against the annular positioning surface.

[0008] Preferably, the inner end face of the bearing housing is separated from the end face of the gear shaft and does not contact it. An oil injection hole communicating with the inner cavity of the bearing housing is opened at the center of the bearing housing, and the oil injection hole is sealed by a screw plug.

[0009] Preferably, the sealing element is a skeleton oil seal.

[0010] The beneficial effects of this utility model are:

[0011] This utility model discloses an independent mounting and lubrication structure for a reducer bearing. A bearing housing is fixed to the housing, and the bearing is installed within it. The gear shaft extends into the bearing housing and mates with the bearing. A seal separates the inner cavity of the bearing housing from the inner cavity of the housing. A higher viscosity lubricating oil or grease with better lubrication performance can be added separately to the inner cavity of the bearing housing, forming independent lubrication for the bearing, ensuring sufficient lubrication and improving the bearing's lubrication reliability. The bearing is assembled between the bearing housing and the gear shaft by first press-fitting the bearing into the bearing housing, and then heat-fitting the bearing housing and bearing onto the gear shaft. This avoids an assembly method where the inner part is tight and the outer part is loose, effectively increasing the interference fit between the bearing outer ring and the bearing housing, improving the positioning reliability of the bearing outer ring, reducing the probability of creep in the bearing outer ring during reducer operation, reducing bearing wear, extending bearing service life, thereby reducing the reducer's failure rate and improving its operational reliability. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the independent mounting and lubrication structure of the reducer bearing of this utility model.

[0013] Figure 2 for Figure 1 A magnified view of a portion of the image. Detailed Implementation

[0014] The following is combined Figures 1-2 The embodiments of this utility model will be described in detail below.

[0015] An independent mounting and lubrication structure for a reducer bearing includes a reducer housing 1, a gear shaft 2 mounted in the housing 1, and a bearing 3 mounted on the gear shaft 2. The bearing 3 is characterized in that: a bearing seat 4 connected to the inner cavity of the housing is fixed on the housing 1; the end of the gear shaft 1 extends into the bearing seat 4; the bearing 3 is mounted between the bearing seat 4 and the gear shaft 2; and a sealing member 5 is press-fitted between the gear shaft 2 and the housing 1 to seal and separate the inner cavity of the bearing seat from the inner cavity of the housing.

[0016] The independent mounting and lubrication structure of the reducer bearing described above involves fixing the bearing housing 4 to the housing 1, mounting the bearing 3 in the bearing housing 4, and inserting the gear shaft 2 into the bearing housing 4 to mate with the bearing 3. A seal 5 is used to seal and separate the inner cavity of the bearing housing from the inner cavity of the housing. A higher viscosity lubricating oil or grease with better lubrication performance can be added separately to the inner cavity of the bearing housing, forming independent lubrication for the bearing 3, ensuring sufficient lubrication and improving the reliability of bearing lubrication. The bearing 3 is assembled between the bearing housing 4 and the gear shaft 2. The bearing 3 can be press-fitted into the bearing housing 4 first, and then heat-fitted onto the gear shaft 2. This avoids an internally tight but externally loose assembly method, effectively increasing the interference fit between the bearing outer ring and the bearing housing 4, improving the positioning reliability of the bearing outer ring, reducing the probability of creep in the bearing outer ring during reducer operation, reducing bearing wear, extending bearing service life, thereby reducing the reducer's failure rate and improving its operational reliability.

[0017] The housing 1 has an assembly protrusion 11 corresponding to the bearing seat 4. The inner end of the bearing seat 4 is integrally formed with a connecting ring 41 that abuts against the assembly protrusion 11. The connecting ring 41 is fastened to the assembly protrusion 11 by bolts. The end of the gear shaft 2 has a bearing positioning surface 21 that abuts against the inner end of the bearing 3. The inner end face of the bearing abuts against the bearing positioning surface 21. The assembly protrusion 11 and the connecting ring 41 are fastened to the bearing seat 4 on the housing 1 by bolts. When the bearing 3 is pressed onto the gear shaft 2, the inner end face of the bearing abuts against the bearing positioning surface 21, indicating that the bearing 3 is pressed into place. This facilitates the cooperation between the bearing 3 and the gear shaft 2 and provides axial positioning for the bearing 3.

[0018] The inner end face of the bearing housing 3 extends into the mounting convex ring 11. An annular positioning surface 12, axially aligned with the inner end face of the bearing housing, is formed on the housing 1. An inner convex ring 31, integrally formed on the gear shaft 3 and located inside the bearing 3, is radially aligned with the mounting convex ring 11. A seal 5 is press-fitted between the mounting convex ring 11 and the inner convex ring 31, with one end abutting against the inner end face of the bearing housing 4 and the other end abutting against the annular positioning surface 12. The seal 5 is press-fitted between the mounting convex ring 11 and the inner convex ring 31, and is axially positioned by the inner end face of the bearing housing and the annular positioning surface 12, improving the positioning reliability of the seal 5. The seal 5 effectively seals and separates the inner cavity of the housing and the inner cavity of the bearing housing, improving the sealing reliability of the lubricating oil or grease in the inner cavity of the bearing housing.

[0019] The inner end face of the bearing housing 4 is separated from and does not contact the end face of the gear shaft 2. An oil injection hole communicating with the inner cavity of the bearing housing 4 is opened at the center of the bearing housing 4 and sealed by a screw plug 6. Lubricating oil or grease is injected into the inner cavity of the bearing housing 4 through the oil injection hole. During use, the oil or grease in the inner cavity of the bearing housing 4 can also be replaced or replenished through the oil injection hole to ensure sufficient lubrication of the bearing and improve lubrication reliability.

[0020] The sealing element 5 is a skeleton oil seal. Skeleton oil seals offer good sealing performance, possess sufficient rigidity, have high load-bearing reliability, and are easy to assemble and position.

[0021] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. An independent mounting and lubrication structure for a reducer bearing, comprising a reducer housing, a gear shaft mounted in the housing, and a bearing mounted on the gear shaft, characterized in that: The bearing housing is fixed on the housing and communicates with the inner cavity of the housing. The end of the gear shaft extends into the bearing housing. The bearing is assembled between the bearing housing and the gear shaft. A press-fit seal is installed between the gear shaft and the housing to seal and separate the inner cavity of the bearing housing from the inner cavity of the housing.

2. The independent mounting and lubrication structure for the reducer bearing according to claim 1, characterized in that: The housing has an assembly protrusion corresponding to the bearing seat. The inner end of the bearing seat is integrally formed with a connecting ring that abuts against the assembly protrusion. The connecting ring is fastened to the assembly protrusion by bolts. The end of the gear shaft has a bearing positioning surface that abuts against the inner end of the bearing. The inner end face of the bearing abuts against the bearing positioning surface.

3. The independent mounting and lubrication structure for the reducer bearing according to claim 2, characterized in that: The inner end face of the bearing housing extends into the mounting convex ring. An annular positioning surface is formed on the housing and is axially aligned with the inner end face of the bearing housing. An inner convex ring is integrally formed on the gear shaft, located inside the bearing and radially aligned with the mounting convex ring. The seal is press-fitted between the mounting convex ring and the inner convex ring, with one end abutting against the inner end face of the bearing housing and the other end abutting against the annular positioning surface.

4. The independent mounting and lubrication structure for the reducer bearing according to claim 1, characterized in that: The inner end face of the bearing housing is separated from the end face of the gear shaft and does not contact it. An oil injection hole communicating with the inner cavity of the bearing housing is opened in the center of the bearing housing, and the oil injection hole is sealed by a screw plug.

5. The independent mounting and lubrication structure for the reducer bearing according to claim 1, characterized in that: The sealing element is a skeleton oil seal.

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