CN110219973B

CN110219973B - Gear transmission structure

Info

Publication number: CN110219973B
Application number: CN201910482258.2A
Authority: CN
Inventors: 徐兰英; 毛世杰; 伍强; 何宝兰; 赵鹏
Original assignee: Guangdong Polytechnic Normal University
Current assignee: Guangdong Polytechnic Normal University
Priority date: 2019-06-04
Filing date: 2019-06-04
Publication date: 2024-04-02
Anticipated expiration: 2039-06-04
Also published as: CN110219973A

Abstract

The invention provides a gear transmission structure which comprises a rotating shaft and a gear, wherein the rotating shaft is provided with an oil inlet channel and an oil through groove, the oil inlet channel is arranged in the rotating shaft, the oil through groove is arranged on the outer wall of the rotating shaft and communicated with the oil inlet channel, the inside of the gear is provided with an oil through hole, a first end of the oil through hole is arranged on teeth of the gear or the surface of a root circle of the gear, a second end of the oil through hole is arranged on the inner wall of a central hole, and the gear is sleeved on the rotating shaft and communicated with the oil through groove. According to the invention, by conveying the lubricating oil to the meshing position of the gears, the gears form a hydrodynamic oil film at the meshing position, so that the lubricating effect is ensured, and meanwhile, the lubricating oil quantity is uniform, the lubricating effect is uniform, and the lubricating oil quantity is saved.

Description

Gear transmission structure

Technical Field

The present invention relates to a gear transmission structure.

Background

The gear transmission structure is widely applied to various fields, such as automobiles, ships, airplanes, robots and the like which are relatively hot at present, and has higher transmission efficiency. However, the gears are susceptible to various degrees of damage under certain heavy loads and poor lubrication conditions, ultimately rendering the gears ineffective. At present, the problem of uneven lubrication oil quantity at the meshing position of gears occurs in the lubrication process. When the lubricating oil quantity is small, the lubricating effect is poor, and the service life of the gear is short; and when the amount of the lubricating oil is large, the lubricating oil is wasted, so that the cost is increased.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a gear transmission structure which can uniformly lubricate oil quantity and lubricating effect, and can save the lubricating oil quantity while ensuring the lubricating effect.

Based on the above, the invention provides a gear transmission structure, which comprises a rotating shaft and a gear, wherein the rotating shaft is provided with an oil inlet channel and an oil through groove, the oil inlet channel is arranged in the rotating shaft, the oil through groove is arranged on the outer wall of the rotating shaft and is communicated with the oil inlet channel, the gear is internally provided with an oil through hole, the first end of the oil through hole is arranged on the tooth of the gear or the surface of the tooth root circle of the gear, the second end of the oil through hole is arranged on the inner wall of the central hole, and the gear is sleeved on the rotating shaft and is communicated with the oil through groove.

Optionally, the cross-sectional area of the first end of the oil hole is larger than the cross-sectional area of the second end of the oil hole.

Optionally, the cross-sectional area of the first end of the oil hole is smaller than the cross-sectional area of the second end of the oil hole.

Optionally, at least one end face of the rotating shaft is provided with an opening, and the opening is communicated with the oil inlet channel.

Optionally, the oil inlet channel is disposed along an axial direction of the rotating shaft.

Optionally, the rotary body is provided with an outer ring and an inner ring, the outer surface of the outer ring is arranged on the inner wall of the oil inlet channel, the inner surface of the outer ring is rotatably connected with the outer surface of the inner ring, and the inner surface of the inner ring is sleeved and fixed on the outer wall of the connecting pipe.

Optionally, the device further comprises an oil pipe, wherein the oil pipe is sleeved on the connecting pipe, and the oil pipe is communicated with the connecting pipe.

Optionally, the oil pipe further comprises a clamping ring, and the oil pipe is fixedly connected with the connecting pipe through the clamping ring.

Optionally, a graphite coating is disposed between the inner surface of the outer ring and the outer surface of the inner ring.

Optionally, the rotating shaft is connected with the gear through a key.

The invention relates to a gear transmission structure, which comprises a rotating shaft and a gear, wherein the rotating shaft is provided with an oil inlet channel and an oil through groove, the oil inlet channel is arranged in the rotating shaft, the oil through groove is arranged on the outer wall of the rotating shaft and is communicated with the oil inlet channel, the inside of the gear is provided with an oil through hole, a first end of the oil through hole is arranged on the tooth of the gear or the surface of the root circle of the gear, a second end of the oil through hole is arranged on the inner wall of a central hole, and the gear is sleeved on the rotating shaft and is communicated with the oil through groove. To the oil feed passageway fuel feeding, lubricating oil can flow from the first end of oil through hole for the gear forms liquid dynamic pressure oil film in the meshing department, guarantees lubricated effect, and even lubricated oil mass simultaneously, even lubricated effect practices thrift the lubricated oil mass.

Drawings

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

Fig. 2 is a partial enlarged view of an embodiment of the present invention.

Fig. 3 is a schematic view of a part of the structure of an embodiment of the present invention.

Reference numerals illustrate:

1. a rotation shaft; 11. an oil inlet passage; 12. oil through grooves; 13. an opening; 14. a key slot; 2. a gear; 21. oil holes; 3. a connecting pipe; 4. a rotating body; 41. an outer ring; 42. an inner ring; 5. an oil pipe; 6. and a clasp.

Detailed Description

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms "top", "bottom", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.

Example 1

Referring to fig. 1-3, a first embodiment provides a gear transmission structure, which includes a rotating shaft 1 and a gear 2, the rotating shaft 1 has an oil inlet channel 11 and an oil through groove 12, the oil inlet channel 11 is disposed in the rotating shaft 1, the oil through groove 12 is disposed on an outer wall of the rotating shaft 1, the oil through groove 12 is communicated with the oil inlet channel 11, an oil through hole 21 is disposed in the gear 2, a first end of the oil through hole 21 is disposed on teeth of the gear 2 or a surface where a root circle of the gear 2 is located, a second end of the oil through hole 21 is disposed on an inner wall of the central hole, and the gear 2 is sleeved on the rotating shaft 1 and the oil through hole 21 is communicated with the oil through groove 12. When oil is supplied to the oil inlet passage 11, the lubricating oil enters the oil inlet passage 11, flows from the oil inlet passage 11 into the oil passage 12, flows from the oil passage 12 through the second end of the oil passage 21, such as the oil passage 21, and finally flows out through the first end of the oil passage 21. When the gear 2 in the embodiment is meshed with other gears, a dynamic pressure oil film can be formed when the gear 2 moves, so that the lubrication effect is ensured, the lubrication oil quantity of each meshing part on the gear 2 can be unified by conveying the lubrication oil to the meshing part of the gear 2 through the oil through hole 21, the lubrication oil quantity is uniform, the lubrication effect is also uniform, excessive oil quantity is avoided, and the lubrication oil quantity is saved. In the present embodiment, the rotary shaft 1 is provided with a key groove 14, and the rotary shaft 1 and the gear 2 are connected by a key.

In this embodiment, the cross-sectional area of the first end of the oil passage hole 21 is larger than the cross-sectional area of the second end of the oil passage hole 21. The structure is suitable for the traditional lubrication modes such as oil dropping, oil immersion, oil mist and the like.

Wherein, in order to facilitate the oil supply to the oil inlet passage 11, the rotary shaft 1 has an opening 13 on at least one end surface, and the opening 13 communicates with the oil inlet passage 11. In order to facilitate the processing of the oil feed passage 11, the oil feed passage 11 is provided along the axial direction of the rotary shaft 1.

When the gear 2 rotates, the oil inlet channel 11 also rotates along with the gear, in order to facilitate oil supply to the oil inlet channel 11, the gear 2 transmission structure provided in this embodiment further includes a connecting pipe 3 and a rotating body 4, the rotating body 4 has an outer ring 41 and an inner ring 42, the outer surface of the outer ring 41 is disposed on the inner wall of the oil inlet channel 11, the inner surface of the outer ring 41 is rotatably connected with the outer surface of the inner ring 42, and the inner surface of the inner ring 42 is sleeved and fixed on the outer wall of the connecting pipe 3. The outer ring 41 rotates with the rotation of the oil feed passage 11, but the connection pipe 3 connected to the inner ring 42 can not rotate with the rotation of the outer ring 41 due to the rotatable connection between the outer ring 41 and the inner ring 42. In this embodiment, a graphite coating is provided between the inner surface of the outer ring 41 and the outer surface of the inner ring 42. The graphite coating plays a lubricating role so that the outer ring 41 and the inner ring 42 can smoothly rotate. In other embodiments, other rotatable connections may be used. The embodiment provides a gear 2 transmission structure, still includes oil pipe 5, and oil pipe 5 cover is located on connecting pipe 3, and oil pipe 5 is linked together with connecting pipe 3. Lubricating oil enters the connecting pipe 3 from the oil pipe 5 and then enters the oil inlet passage 11 from the connecting pipe 3. By providing such a structure, the rotation of the oil pipe 5 is not driven when the rotation shaft 1 rotates, and smooth oil supply can be ensured. The gear transmission structure in the embodiment further comprises a clamping ring 6, and the oil pipe 5 is fixedly connected with the connecting pipe 3 through the clamping ring 6. It should be noted that in this embodiment, an interference fit is adopted between the outer ring 41 and the oil inlet channel 11, between the inner ring 42 and the connecting pipe 3, and between the oil pipe 5 and the connecting pipe 3.

Example two

The second embodiment provides a gear transmission structure, which is different from the first embodiment in that the cross-sectional area of the first end of the oil through hole 21 is smaller than the cross-sectional area of the second end of the oil through hole 21. The second embodiment is suitable for the occasion with heavy load, and the dynamic pressure oil film formed at the meshing position of the gear 2 under the working condition has better effect than that in the first embodiment.

The above is the preferred embodiment of the present invention, in which the oil through hole 21 is provided in the gear 2, the oil inlet channel 11 and the oil through groove 12 are provided in the rotating shaft 1, and the lubricating oil is delivered to the engagement position of the gear 2, so that the gear 2 forms a hydrodynamic oil film at the engagement position, the lubrication effect is ensured, and at the same time, the lubrication oil quantity is uniform, the lubrication effect is uniform, and the lubrication oil quantity is saved.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.

Claims

1. The gear transmission structure is characterized by comprising a rotating shaft and a gear, wherein the rotating shaft is provided with an oil inlet channel and an oil through groove, the oil inlet channel is arranged in the rotating shaft, the oil through groove is arranged on the outer wall of the rotating shaft and is communicated with the oil inlet channel, the gear is internally provided with an oil through hole, the first end of the oil through hole is arranged on the tooth of the gear or the surface of the tooth root circle of the gear, the second end of the oil through hole is arranged on the inner wall of the central hole, and the gear is sleeved on the rotating shaft and is communicated with the oil through groove;

the cross-sectional area of the first end of the oil through hole is larger than that of the second end of the oil through hole, or the cross-sectional area of the first end of the oil through hole is smaller than that of the second end of the oil through hole;

at least one end face of the rotating shaft is provided with an opening, and the opening is communicated with the oil inlet channel;

the oil inlet channel is arranged along the axial direction of the rotating shaft;

the oil inlet channel is characterized by further comprising a connecting pipe and a rotating body, wherein the rotating body is provided with an outer ring and an inner ring, the outer surface of the outer ring is arranged on the inner wall of the oil inlet channel, the inner surface of the outer ring is rotatably connected with the outer surface of the inner ring, and the inner surface of the inner ring is sleeved and fixed on the outer wall of the connecting pipe;

the rotating shaft is connected with the gear through a key.

2. The gear transmission structure according to claim 1, further comprising an oil pipe, wherein the oil pipe is sleeved on the connecting pipe, and the oil pipe is communicated with the connecting pipe.

3. The gear transmission structure according to claim 2, further comprising a snap ring, wherein the oil pipe is fixedly connected with the connection pipe through the snap ring.

4. The gear transmission structure of claim 1 wherein a graphite coating is provided between the inner surface of the outer ring and the outer surface of the inner ring.