CN217152918U

CN217152918U - Oil duct structure for supplying oil to front bearing of main shaft through input shaft weight reduction space

Info

Publication number: CN217152918U
Application number: CN202220379090.XU
Authority: CN
Inventors: 何胜平; 宾彬; 胡伊帆; 于爱军; 陈尚松
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-09
Anticipated expiration: 2032-02-24

Abstract

An oil duct structure for supplying oil to a front main shaft bearing through an input shaft weight reducing space comprises an oil hole in a shell, an input shaft bearing position, an input shaft oil duct hole, an input shaft weight reducing space, a front main shaft bearing position and a return path, wherein the oil hole is formed in a transmission shell, the oil duct hole is formed in the input shaft from the input shaft bearing position to the input shaft weight reducing space, the front main shaft bearing position and the return path returns to a cavity of the transmission from the front main shaft bearing position, the input shaft oil duct hole is communicated to the input shaft weight reducing space from an inlet in the periphery of the input shaft according to the tangential direction of the input shaft weight reducing space with a round section, and the shaft entering direction of the input shaft oil duct hole is opposite to the rotating direction of the input shaft. The advantages are that: the oil delivery amount from the oil passage hole of the inlet shaft to the weight reduction space can be remarkably increased, and the lubricating oil supply to the front bearing of the main shaft is fully ensured.

Description

Oil duct structure for supplying oil to front bearing of main shaft through input shaft weight reduction space

Technical Field

The utility model relates to a subtract oil duct structure of heavy space to main shaft front bearing fuel feeding through the input shaft belongs to gearbox technical field.

Background

In the new energy transmission, an oil passage hole is formed in a transmission shell to an input shaft bearing seat, an input shaft oil passage hole is formed in an input shaft to a weight reduction space in the rear end of the input shaft, and the main shaft front bearing in the weight reduction space is lubricated by supplying oil. However, the oil duct has two problems that firstly, the shaft-entering oil passage hole formed in the input shaft is a radial hole, and the lubricating oil of the bearing seat of the input shaft is difficult to enter the shaft-entering oil passage hole due to the influence of centrifugal force when the input shaft rotates at high speed, so that the oil supply of the front bearing of the main shaft is insufficient; and secondly, lubricating oil for completing the lubrication of the front bearing of the main shaft is thrown out through a gap between the main shaft behind the front bearing of the main shaft and the inner wall of the front bearing position of the main shaft at the rear end of the input shaft under the action of centrifugal force, and the lubricating oil cannot further lubricate a synchronous gear ring sleeved on the periphery of the rear end of the input shaft and the periphery of the rear end of the input shaft.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is mainly: the problem that the oil supply of a main shaft front bearing is insufficient by a traditional oil duct structure for supplying oil from inside to outside through a weight reduction space of an input shaft of a transmission is solved.

The invention contents of the utility model are:

an oil duct structure for supplying oil to a front main shaft bearing through an input shaft weight reducing space comprises an in-shell oil hole arranged in a transmission shell, an input shaft bearing position, an input shaft oil duct hole arranged from the input shaft bearing position on an input shaft to the input shaft weight reducing space, the front main shaft bearing position and a return path returning from the front main shaft bearing position to a transmission cavity, wherein the input shaft oil duct hole is communicated to the input shaft weight reducing space from an inlet in the periphery of the input shaft according to the tangential direction of the input shaft weight reducing space with a round section, and the shaft entering direction of the input shaft oil duct hole is opposite to the rotating direction of the input shaft.

Further, the shaft-in oil passage hole has an upper lip and a lower lip at an inlet of the outer periphery of the input shaft, the lower lip being recessed downward to form an oil-in groove.

Furthermore, the return path returning to the cavity of the transmission comprises an outlet oil passage hole arranged from the front bearing position of the main shaft to the periphery of the rear end of the input shaft, and is used for supplying oil between the synchronous gear ring and the periphery of the input shaft.

Has the advantages that:

1. the oil delivery amount from the oil passage hole of the inlet shaft to the weight reduction space can be remarkably increased, and the lubricating oil supply to the front bearing of the main shaft is fully ensured;

2. the lubricating oil for completing the lubrication of the front bearing of the main shaft can further lubricate the synchronous gear ring sleeved on the periphery of the rear end of the input shaft and the periphery of the input shaft through the shaft outlet oil passage hole under the action of centrifugal force.

Drawings

FIG. 1 is a schematic view of a partial structure of a transmission in a region where the oil passage structure is located;

FIG. 2 is a schematic diagram of the oil path structure, in which the arrows indicate the flow direction of the lubricating oil;

fig. 3 is a schematic structural view of an inlet oil passage hole entering an input shaft weight reduction space.

In the figure: 1. a transmission housing; 2. an input shaft; 3. a main shaft; 4. an oil hole in the housing; 5. an input shaft bearing position; 6.

an oil passage hole of the shaft; 601. the upper lip; 602. a lower lip; 603. an oil inlet groove; 7. an input shaft weight reduction space; 8. a main shaft front bearing position; 9. a return path; 901. a backflow gap; 902. an outlet oil passage hole; 10. a synchronous gear ring; 11. a transmission cavity.

Detailed Description

The invention is further described below with reference to the accompanying drawings:

as shown in fig. 1 and 2, an oil passage structure for supplying oil to a front main shaft bearing through an input shaft weight reduction space comprises an in-shell oil hole 4, an input shaft bearing position 5, an input shaft oil passage hole 6, an input shaft weight reduction space 7, a front main shaft bearing position 8 and a return passage 9, wherein the in-shell oil hole is formed in a transmission shell 1, the in-shell oil passage hole extends from the input shaft bearing position 5 to the input shaft weight reduction space 7, the return passage 9 returns to a transmission cavity 11 from the front main shaft bearing position 8, and the return passage 9 comprises a return gap 901 between the periphery of a main shaft 3 passing through the front main shaft bearing and the inner wall of the front main shaft bearing position 8 at the rear end of the input shaft 2. The shaft inlet oil channel hole 6 is communicated to the input shaft weight reducing space 7 from an inlet on the periphery of the input shaft 2 along the tangential direction of the input shaft weight reducing space 7 with a round section, and the shaft inlet direction of the shaft inlet oil channel hole 6 is opposite to the rotating direction of the input shaft 2. Therefore, the lubricating oil which is relatively static at the inlet of the shaft-entering oil duct hole 6 can be forcibly pressed into the shaft-entering oil duct hole 6 by utilizing the high-speed rotation of the input shaft 2, the oil delivery amount of the shaft-entering oil duct hole 6 to a weight-reducing space can be obviously increased, and the lubricating oil supply to the front bearing of the main shaft can be fully ensured.

As shown in fig. 2 and 3, the inlet oil passage hole 6 has an upper lip 601 and a lower lip 602 at the inlet of the outer periphery of the input shaft 2, and the lower lip 602 is recessed downward to form an oil inlet groove 603. When the input shaft 2 rotates at a high speed, the upper lip 601 facing the rotation direction can restrict the outflow of the lubricant in the inlet, and the oil inlet groove 603 can receive more lubricant.

As shown in fig. 1, the return path 9 returning to the transmission cavity 11 further includes an outlet oil passage hole 902 provided from the main shaft front bearing position 8 to the outer periphery of the rear end of the input shaft 2, for supplying oil between the synchronizer ring 10 and the outer periphery of the input shaft 2, and the lubricating oil lubricated between the synchronizer ring 10 and the outer periphery of the input shaft 2 directly returns to the transmission cavity 11.

The above embodiments are only for the purpose of more clearly describing the invention and should not be considered as limiting the scope of protection covered by the invention, any modification of the equivalent should be considered as falling within the scope of protection covered by the invention.

Claims

1. The utility model provides a subtract oil duct structure of heavy space oil feed to main shaft front bearing through input shaft, is including seting up oilhole (4) in the shell in derailleur casing (1), input shaft bearing position (5), set up input shaft bearing position (5) on input shaft (2) and input shaft subtract income axle oil duct hole (6) of heavy space (7) to the input shaft, the input shaft subtracts heavy space (7), main shaft front bearing position (8) and from main shaft front bearing position (8) backward flow to return circuit (9) of derailleur cavity (11), its characterized in that: the shaft inlet oil passage hole (6) is communicated to the input shaft weight reducing space (7) from an inlet on the periphery of the input shaft (2) in the tangential direction of the input shaft weight reducing space (7) with a round section, and the shaft inlet direction of the shaft inlet oil passage hole (6) is opposite to the rotating direction of the input shaft (2).

2. The oil passage structure for supplying oil to the front bearing of the main shaft through the input shaft weight reduction space as set forth in claim 1, wherein: the shaft-in oil channel hole (6) is provided with an upper lip (601) and a lower lip (602) at the inlet of the periphery of the input shaft (2), and the lower lip (602) is recessed downwards to form an oil-in groove (603).

3. The oil passage structure for supplying oil to the front bearing of the main shaft through the input shaft weight reduction space as set forth in claim 1, wherein: and the return path (9) returning to the transmission cavity (11) comprises a shaft outlet oil channel hole (902) arranged from the main shaft front bearing position (8) to the periphery of the rear end of the input shaft (2) and used for supplying oil between the synchronous gear ring (10) and the periphery of the input shaft (2).