CN214465962U

CN214465962U - Self-lubricating gear transmission device

Info

Publication number: CN214465962U
Application number: CN202120004690.3U
Authority: CN
Inventors: 祝贺; 谢加辉; 肖泽桦; 张又孔; 何烨; 张冲; 高彬; 李振华; 赖舒平; 李春
Original assignee: CRRC Zhuzhou Locomotive Co Ltd
Current assignee: CRRC Zhuzhou Locomotive Co Ltd
Priority date: 2021-01-04
Filing date: 2021-01-04
Publication date: 2021-10-22
Anticipated expiration: 2031-01-04

Abstract

The utility model discloses a self-lubricating gear transmission device, which comprises a box body, a driven gear arranged on an axle, and a driving gear shaft driving the driven gear to rotate, wherein the driving gear shaft is arranged on the box body through a first dry-type lubricating bearing group, and the axle is arranged on the box body through a second dry-type lubricating bearing group; the meshing tooth surface of the driven gear and the meshing tooth surface of the driving gear shaft are both provided with a plurality of grooves, and solid lubricants are filled in the grooves. Compare in traditional oil lubrication gear, the utility model discloses need not to set up the oil circuit, reduced static seal and oiling oil extraction and oil level and observed the structure, effectively simplified gear's design and assembling process, need not the periodic replacement lubricating oil, the cost is reduced.

Description

Self-lubricating gear transmission device

Technical Field

The utility model relates to a self-lubricating gear transmission belongs to rail transit vehicle's transmission structure.

Background

At present, oil lubrication gear transmission devices are adopted in transmission devices of rail transit vehicles. Oil lubrication is mainly used for lubricating the meshing surfaces of the gear pair and the bearing. In order to realize the lubricating function, a whole set of complete lubricating oil way and sealing structure is required to be designed for the transmission device, but the defects of design, manufacture and assembly sometimes cause the problems of oil leakage, oil throwing and the like of the gear transmission device, and the oil lubricating gear transmission device needs to be periodically supplemented with lubricating oil, so that the inconvenience is brought to the maintenance of later-stage gear transmission. Meanwhile, considering the existence of lubricating oil, the box body structure of the gear transmission device cannot be randomly divided, and great difficulty is brought to the maintenance of the gear transmission device to a certain degree.

Dry (lubrication) bearing, like the solid lubrication bearing that chinese utility model application CN201922176930.3 disclosed, can rely on its self adnexed solid lubrication material to realize the self-lubrication under the oil-free operating mode, the wide application is in the slip position of various machinery, is particularly useful for unable oiling or difficult work position, still can reduce cost, reduce machinery volume simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a self-lubricating gear transmission to fundamentally solves gear transmission's oil leakage, oil leak and gets rid of oil scheduling problem, the later maintenance and the maintenance of being convenient for.

The utility model adopts the technical proposal that: a self-lubricating gear transmission device comprises a box body, a driven gear and a driving gear shaft, wherein the driven gear is arranged on an axle, the driving gear shaft drives the driven gear to rotate, the driving gear shaft is arranged on the box body through a first dry-type lubricating bearing group, and the axle is arranged on the box body through a second dry-type lubricating bearing group; the meshing tooth surface of the driven gear and the meshing tooth surface of the driving gear shaft are both provided with a plurality of grooves, and solid lubricants are filled in the grooves.

Compare in traditional oil lubrication gear, the utility model discloses a driving gear axle and axletree are all installed on the box through dry-type lubricated bearing, and the meshing flank of tooth of driven gear and driving gear axle all packs has solid lubricant. During gear transmission, the dry lubricant in the dry lubrication bearing and the solid lubricant in the groove can be automatically released to form a lubricating film, so that the automatic lubrication of the bearing and the tooth surface is realized.

Preferably, the groove is oval.

Preferably, the first dry-type lubricated bearing group includes a dry-type lubricated cylindrical roller bearing on the motor side and a dry-type lubricated ball bearing on the wheel side.

Preferably, the second dry-type lubricating bearing set includes dry-type lubricating tapered roller bearings on both sides of the driven gear.

Preferably, the box body comprises an upper box body and a lower box body, and the driven gear is positioned on the box closing surface of the upper box body and the lower box body; and the upper box body and the lower box body comprise a left part and a right part which are detachably connected.

In the scheme, the box body is divided into four parts by adopting horizontal and vertical box separation, so that the installation and later-period maintenance are facilitated.

The utility model has the advantages that: the utility model adopts the dry-type lubricated gear pair and the bearing, cancels the labyrinth and oil return design, reduces the static seal, the oil injection and discharge and oil level observation structure, effectively simplifies the design and the assembly process of the gear transmission device, does not need to regularly change the lubricating oil, and reduces the cost; meanwhile, the box body is divided into horizontal and vertical boxes, and the boxes are opened according to requirements, so that the box is convenient to inspect and maintain.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is an enlarged view of the meshing surface of the middle gear pair of the present invention.

Detailed Description

A self-lubricating gear transmission device is composed of a driven gear 1, a dry-type lubricating tapered roller bearing 2, an output end outer end cover 3, a driving gear shaft 4, a motor side outer end cover 5, a dry-type lubricating cylindrical roller bearing 6, a box body 7, a dry-type lubricating ball bearing 8, a wheel side outer end cover 9, a bearing gland 10, an axle 11 and the like as shown in figures 1 to 3. The box body 7 is divided into an upper box body 71 and a lower box body 72 by adopting horizontal box division, the upper box body 71 is vertically divided into a left part 71A and a right part 71B, the lower box body 72 is vertically divided into a left part 72A and a right part 72B, and the four box surfaces are fixed by bolts and positioning pins so as to facilitate installation and maintenance.

The axle 11 is carried by the dry-type lubricated tapered roller bearing 2, the drive gear shaft 4 is carried by the dry-type lubricated cylindrical roller bearing 6 and the dry-type lubricated ball bearing 8, and a bearing cover 10 is provided outside the dry-type lubricated ball bearing 8. The two sides of the bearing are provided with dust covers, and dry lubricants such as graphite, molybdenum disulfide and the like, or lubricating oil additives such as nano particles, fluoropolyether (PFPE) and the like are filled in the bearing, so that the self-lubricating bearing can adapt to the self-lubricating function of high rotating speed. The engaging tooth surfaces of the driven gear 1 and the driving gear shaft 4 are each provided with a plurality of elliptic grooves 12 between the pitch circle and the addendum circle, the width and depth of the grooves 12 are about 50 μm and 100 μm, respectively, and the inside is filled with molybdenum disulfide or other solid lubricant and compacted. When the gears mesh, the lubricant in these grooves 12 will slowly release, forming a lubricating film, lubricating the tooth surfaces.

Because there is not lubricating oil in the gear box, only need through output end outer end cap 3 and motor side outer end cap 5 and wheel side outer end cap 9 to bearing and box 7 inside carry out waterproof dustproof to fix a position can bearing and gear box.

Claims

1. A self-lubricating gear transmission device comprises a box body (7), a driven gear (1) arranged on an axle (11) and a driving gear shaft (4) for driving the driven gear (1) to rotate, and is characterized in that the driving gear shaft (4) is arranged on the box body (7) through a first dry-type lubricating bearing group, and the axle (11) is arranged on the box body (7) through a second dry-type lubricating bearing group; the meshing tooth surface of the driven gear (1) and the meshing tooth surface of the driving gear shaft (4) are provided with a plurality of grooves (12), and the grooves (12) are filled with solid lubricant.

2. A self-lubricating gear transmission according to claim 1, characterised in that the recess (12) is oval.

3. A self-lubricating gear transmission according to claim 1, characterised in that the first dry-lubricated bearing set comprises a dry-lubricated cylindrical roller bearing (6) on the motor side and a dry-lubricated ball bearing (8) on the wheel side.

4. A self-lubricating gear transmission according to claim 1, characterised in that the second dry-lubricated bearing set comprises dry-lubricated tapered roller bearings (2) on both sides of the driven gear (1).

5. A self-lubricating gear transmission device according to claim 1, wherein the housing (7) comprises an upper housing (71) and a lower housing (72), and the driven gear (1) is located at a box-closing surface of the upper housing (71) and the lower housing (72); and the upper box body (71) and the lower box body (72) comprise a left part and a right part which are detachably connected.