CN211423346U - A gear box lubricating device - Google Patents

Abstract

The utility model relates to a gear box lubricating arrangement belongs to engineering machine tool gear drive technical field. The device comprises a horizontal shaft low-speed stage sun gear, two ends of which are respectively supported on a first axial thrust ring and a second axial thrust ring in an axial limiting manner, wherein the first axial thrust ring is embedded in a counter bore at the inner end of a box body end cover; an oil collecting box which is positioned above the first axial thrust ring and is communicated with the oil outlet at the bottom is fixed on the end cover of the box body, and the oil collecting box is provided with an oil inlet which is adjacent to and directly faces to the meshing position of the low-speed stage sun wheel and the low-speed stage planet wheel; the excircle of the first axial thrust ring is provided with a circumferential oil duct and a radially extending end surface oil groove, the circumferential oil duct corresponds to the oil outlet hole in position, and the circumferential oil duct is at least communicated with the inner hole of the circumferential oil duct through a radial oil hole or is communicated with the end surface oil groove through an axial oil duct. The utility model discloses properly solved and be located the lubricated difficult problem of the difficult special position part that splashes of low-speed marginal zone.

Description

A gear box lubricating device

technical field

The utility model relates to a transmission lubricating device, in particular to a lubricating device suitable for an off-highway mine wheel side gear box, belonging to the technical field of engineering machinery gear transmission.

Background technique

The off-highway mine wheel side gearbox is installed inside the vehicle tire, and its main function is to reduce the speed and increase the torque to drive the vehicle forward. On mechanical trucks, it is usually at the end of the drive chain. The typical transmission route is that the power from the engine first passes through the gearbox, to the main gearbox, and then to the wheel gearbox; on electric wheel trucks, the typical route It is the power of the engine to the generator, and then controlled by the frequency conversion to the traction motor. The traction motor converts the electrical energy into mechanical energy with high speed and small torque, and then through the gear transmission device of the wheel gear box, it is converted into low-speed high-torque output.

The wheel gear box is usually a two-stage or three-stage transmission mechanism. The load of high-speed and small torque is input from the first stage, and gradually becomes the low-speed high-torque load. When working, a certain amount of lubricating oil is loaded into the wheel side gear box, and the gears, bearings, friction pairs and other parts are lubricated by "splashing" through the oil churning of the rotating parts. However, due to the special position of individual parts inside the wheel gear box, the lubricating oil cannot "splash" to lubricate them, thus affecting the life of the parts and thus the reliability of the wheel gear box.

SUMMARY OF THE INVENTION

The purpose of the utility model is to: in view of the problems existing in the above-mentioned prior art, to propose a wheel-side gearbox lubricating device that can properly solve the problem of lubricating parts in special positions that are difficult to splash.

In order to achieve the above purpose, the basic technical scheme of the wheel gear box lubricating device of the present invention is as follows: comprising a horizontal shaft low-speed sun gear whose ends are axially limited and supported on the first and second axial thrust rings respectively, the An axial thrust ring is embedded in the countersunk hole at the inner end of the box body end cover, the box body end cover cover is fixed on the low-speed stage planetary carrier as the shell, the low-speed stage sun gear and the low-speed stage planetary gear are outside meshing, the low-speed planetary gear is meshed with the fixed ring gear, and the low-speed planetary gear is supported on the low-speed planetary pin shaft through the low-speed planetary bearing; the box end cover is fixed on the first axial an oil collecting box above the thrust ring and communicating with the oil outlet hole at the bottom, the oil collecting box has an oil inlet adjacent to and facing the engagement position of the low-speed sun gear and the low-speed planetary gear; the first axial thrust ring The outer circle has a circumferential oil passage corresponding to the oil outlet hole and a radially extending end face oil groove.

A further improvement of the present invention is that the oil collecting box is arc-shaped and is located between the outer ring of the countersunk hole in which the first axial thrust ring is embedded and the inner circle of the flange ring of the box body end cover.

A further improvement of the present invention is that the oil collecting box is composed of a thin-walled metal plate welded on the end cover of the box body.

A further improvement of the present invention is that the end face oil grooves are evenly distributed in the circumferential direction, extend radially, and are shallow outside and deep inside.

A further improvement of the present invention is that one end of the horizontal shaft low-speed sun gear is supported on the first axial thrust ring through the axial limit of its central shaft, and the other end is supported on the second shaft through the end face counterbore axial limit. To the thrust ring, the second axial thrust ring is sleeved on the diameter-reduced shaft end of the front-stage sun gear.

In this way, during operation, the oil squeezed from the gap between the meshing teeth of the low-speed sun gear and the low-speed planetary gear will enter the oil collecting box from the oil inlet, and then leak from the bottom oil outlet to the circumferential oil of the first axial thrust ring. Then, the circumferential oil channel lubricates the rotating surface formed by the inner hole of the first axial thrust ring and the low-speed sun gear and the friction surface of the axial limit through the radial oil hole or the end face oil groove, so as to properly solve these problems at low speed. Lubrication problems for parts in special locations where it is difficult to splash in edge areas.

Description of drawings

The present utility model will be described in further detail below in conjunction with the embodiments given in the accompanying drawings.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention.

FIG. 2 is a schematic three-dimensional structural diagram of the end cap of the embodiment of FIG. 1 .

FIG. 3 is a schematic cross-sectional structural diagram of the end cap of the embodiment of FIG. 1 .

FIG. 4 is a schematic three-dimensional structural diagram of the first axial thrust ring of the embodiment of FIG. 1 .

FIG. 5 is a schematic cross-sectional structural diagram of the first axial thrust ring in the embodiment of FIG. 1 .

FIG. 6 is a schematic three-dimensional structure diagram of a first axial thrust ring according to another embodiment.

FIG. 7 is a schematic cross-sectional structural diagram of a first axial thrust ring according to another embodiment.

Detailed ways

Example 1

The basic structure of the gearbox lubricating device of this embodiment is shown in Figure 1. One end of the horizontal shaft low-speed sun gear 3 is axially limited and supported on the first axial thrust ring 2 through its central axis, and the other end is axially supported through the end face countersunk hole. The limit is supported on the second axial thrust ring 10 . The first axial thrust ring 2 is embedded in the countersunk hole at the inner end of the box end cover 1 , and the second axial thrust ring 10 is sleeved on the reduced diameter shaft end of the sun gear of the front stage 9 (high-speed stage).

The cover of the box body 1 is fixed on the low-speed planetary carrier 4 as the casing (rotatable), the low-speed sun gear 3 is meshed with the low-speed planetary gear 5, and the low-speed planetary gear 5 is inside the fixed ring gear 8 Meshing, the low-speed planetary gear 5 is supported on the low-speed planetary pin 6 through the low-speed planetary bearing 7 , and the planetary pin 6 is supported in the circumferentially evenly distributed pin holes on the inner end face of the low-speed planet carrier 4 .

2 and 3, it can be seen that the box end cover 1 is fixed with an arc-shaped oil collecting box 1-1 located above the first axial thrust ring 2 and communicating with the bottom oil outlet hole 1-3. The oil collecting box 1-1 is located between the outer ring of the countersunk hole in which the first axial thrust ring 2 is embedded and the inner circle of the flange ring of the box body end cover 1, and is composed of a thin-walled metal plate welded on the box body end cover 1 , the production process is simple. The oil collecting box 1-1 has an end face oil inlet 1-2 adjacent to and facing the engagement position of the low-speed sun gear 3 and the low-speed planetary gear 5.

The first axial thrust ring 2 is shown in Figures 4 and 5. The outer circle has a circular arc bottom circumferential oil passage 2-1 corresponding to the oil outlet hole 1-3, and has four outer passages that are evenly distributed in the circumferential direction and extend radially. The shallow and deep circular arc bottom end face oil groove 2-3 and the circumferential oil passage 2-1 communicate with its inner hole through the radial oil hole 2-2 which is uniformly distributed in the circumferential direction and whose angular position corresponds to the end face oil groove 2-3.

As shown in Figures 6 and 7, the circumferential oil passages 2-1 pass through the axial oil passages 2-2' which are uniformly distributed on the outer circumference of the first axial thrust ring 2 and whose angular positions correspond to the end face oil grooves 2-3. It communicates with the end face oil tank.

Of course, the circumferential oil passage 2-1 can also communicate with its inner hole through radial oil holes 2-2 that are evenly distributed in the circumferential direction and whose angular positions correspond to the oil grooves 2-3 on the end face, and also pass through the outer circumference of the first axial thrust ring 2. The axial oil passages 2-2', which are evenly distributed and whose angular positions correspond to the end face oil grooves 2-3, are communicated with the end face oil grooves.

The lubricating device of this embodiment is provided with an oil collecting box and a lubricating channel, so that the parts that are difficult to splash and lubricate at low speed can be fully lubricated, and the use requirement of ensuring the normal operation of the gearbox for a long time is met. The device is simple in structure and low in cost, and practice has shown that it can effectively solve the lubrication problem of the special internal position of the gear box, and it is difficult to lubricate parts by conventional methods.

In addition to the above-mentioned embodiments, the present invention may also have other implementations. All technical solutions formed by equivalent replacement or equivalent transformation fall within the protection scope required by the present invention.

Claims (5)

1. A gear box lubricating device, comprising a horizontal axis low-speed sun gear (3) whose ends are axially limited and supported on first and second axial thrust rings (2, 10) respectively, the first axial The thrust ring is embedded in the countersunk hole at the inner end of the box body end cover (1), the box body end cover cover is fixed on the low-speed stage planet carrier (4) as the shell, and the low-speed stage sun gear is connected to the low-speed stage. The planetary gear (5) is externally meshed, the low-speed planetary gear is internally meshed with the fixed ring gear (8), and the low-speed planetary gear is supported on the low-speed planetary pin shaft (6) through the low-speed planetary gear bearing (7). ; It is characterized in that: an oil collecting box (1-1) which is located above the first axial thrust ring and communicated with the bottom oil outlet hole (1-3) is fixed on the end cover of the box body, and the oil collecting box has an adjacent oil collecting box. And it faces the oil inlet (1-2) at the meshing position of the low-speed sun gear (3) and the low-speed planetary gear (5); the outer circle of the first axial thrust ring has a circumference corresponding to the oil outlet hole. Towards the oil passage (2-1) and the radially extending end face oil groove (2-3), the circumferential oil passage communicates with its inner hole at least through the radial oil hole (2-2), or through the axial oil passage ( 2-2') communicate with the end face oil groove. 2. The gearbox lubricating device according to claim 1, wherein the oil collecting box is arc-shaped, and is located in the outer ring of the countersunk hole in which the first axial thrust ring is embedded and the flange ring of the end cover of the box body between circles. 3 . The gear box lubricating device according to claim 2 , wherein the oil collecting box is composed of a thin-walled metal plate welded on the end cover of the box body. 4 . 4 . The gear box lubricating device according to claim 3 , wherein the end face oil grooves are uniformly distributed in the circumferential direction, extend radially, and are shallow outside and deep inside. 5 . 5 . The gearbox lubricating device according to claim 4 , wherein one end of the low-speed sun gear of the horizontal shaft is axially limited and supported on the first axial thrust ring by its central axis, and the other end is supported by the end face countersunk hole 5 . The axial limit is supported on the second axial thrust ring, and the second axial thrust ring is sleeved on the diameter-reduced shaft end of the front-stage sun gear.

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