CN215059226U

CN215059226U - Gear box

Info

Publication number: CN215059226U
Application number: CN202120400920.8U
Authority: CN
Inventors: 王怡祖; 代昌举; 程健平; 明建新
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-12-07
Anticipated expiration: 2031-02-23

Abstract

The utility model relates to a lubricated technical field of gear box discloses a gear box. The gearbox comprises a shell, a planet carrier, a sun gear and a planet gear, wherein a lubricating medium is arranged in the shell; the planet carrier is arranged in the shell and is partially soaked in a lubricating medium, the planet carrier comprises two webs and an upright post, the two webs are arranged at intervals and oppositely, and the two webs are connected through the upright post; the planet wheel and the sun wheel are rotatably arranged between the two webs and are in meshed connection; one web is provided with a first through hole, an oil circuit structure is arranged in the upright post, and the oil circuit structure is communicated with the first through hole; when the planet carrier rotates, the lubricating medium can be conveyed to the gear teeth of the sun gear through the first through hole and the oil path structure. The utility model discloses a during gear box work or idle state, also can realize the effective lubrication to sun gear and planet wheel flank of tooth, and simple structure, save the processing cost.

Description

Gear box

Technical Field

The utility model relates to a lubricated technical field of gear box especially relates to a gear box.

Background

In a gear box adopting a planetary gear train, in order to reduce the abrasion between the tooth surfaces of a sun gear and a planetary gear and prolong the service life of the gear box, the tooth surfaces of the sun gear must be reasonably lubricated. The existing lubrication mode of the sun gear of the gearbox basically adopts forced lubrication, namely, an oil pipe is arranged in a planet carrier and is connected with an external oil pump to convey lubricating oil to the sun gear for lubrication. On one hand, the lubricating mode relates to the winding problem of an oil pipe when the planet carrier rotates, the structure is complex, and the requirement on machining precision is high. On the other hand, in the use, when external oil pump lubricating system breaks down, or is in the idle work condition, force-feed lubrication's oil pump generally can stop work, must lead to the sun gear to be in lubricated operating condition, and then influences the life of gear box.

Based on this, a gear box is needed to solve the existing problems.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide a gear box, when having realized gear box work or idle state, also can realize the effective lubrication to sun gear and planet wheel flank of tooth, and simple structure, save the processing cost.

In order to achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, a gearbox is provided, comprising:

the lubricating device comprises a shell, wherein a lubricating medium is arranged in the shell;

the planet carrier is arranged in the shell and is partially soaked in the lubricating medium, the planet carrier comprises an upright post and two webs, the two webs are arranged at intervals and oppositely, and the two webs are connected through the upright post;

the planetary gear and the sun gear are rotatably arranged between the two webs and are in meshed connection;

one of the webs is provided with a first through hole, an oil path structure is arranged in the upright post, and the oil path structure is communicated with the first through hole;

when the planet carrier rotates, the lubricating medium can be conveyed to the gear teeth of the sun gear through the first through hole and the oil path structure.

As a preferred technical scheme of the gearbox, the gearbox also comprises a first rotating frame bearing, wherein the first rotating frame bearing is arranged on the first side of the planet carrier;

a first lubricating oil channel is arranged in the planet carrier, one end of the first lubricating oil channel is communicated with the oil channel structure, and the other end of the first lubricating oil channel points to the first rotating frame bearing.

As a preferred technical scheme of the gearbox, the gearbox further comprises a second rotating frame bearing, and the second rotating frame bearing is arranged on the second side of the planet carrier;

a second lubricating oil channel is arranged in the planet carrier, one end of the second lubricating oil channel is communicated with the cavity of the shell, and the other end of the second lubricating oil channel points to the second rotating frame bearing.

As a preferable technical scheme of the gear box, an oil stirring cavity for increasing the picking-up amount of the lubricating medium is arranged at one end, away from the second rotating stand bearing, of the second lubricating oil channel, and the second lubricating oil channel is communicated with a cavity of the shell through the oil stirring cavity.

As a preferable technical scheme of the gearbox, an oil collecting plate used for increasing the collecting amount of the lubricating medium is arranged on the outer side wall of the planet carrier, and a cavity of the oil collecting plate is communicated with the oil stirring cavity.

As a preferred technical scheme of the gearbox, the upright post is of a solid structure and is provided with a second through hole, a first end of the second through hole is communicated with the first through hole, a second end of the second through hole points to gear teeth of the sun gear, and the second through hole forms the oil path structure.

As an optimal technical scheme of a gear box, first through-hole is kept away from second through-hole one end is connected with and stirs the oil groove, it sets up in the web is kept away from stand one side.

As a preferred technical scheme of the gear box, an oil baffle plate is further arranged on the outer side of the oil stirring tank, the oil baffle plate is arranged on one side, close to the center of the web plate, of the oil stirring tank, an oil stirring cavity is formed between the oil baffle plate and the oil stirring tank, and an oil inlet is formed in the part, not shielded by the oil baffle plate, of the oil stirring tank.

As a preferred technical scheme of gear box, the stand is provided with the cavity of both ends trompil, the gear box still includes defeated oil pipe, defeated oil pipe's both ends are fixed in two respectively the trompil, just defeated oil pipe communicate in first through-hole, defeated oil pipe forms the oil circuit structure.

As a preferred technical scheme of the gear box, two ends of the oil delivery pipe are respectively fixed on the two openings through connecting pieces, and the connecting pieces are threaded clamping sleeves; or

Both ends of the oil pipeline are respectively welded to the two openings; or

And two ends of the oil delivery pipe are respectively bonded to the two openings.

The utility model has the advantages that:

when the planet carrier rotates, the web plate stirs a lubricating medium in the shell, and when the first through hole rotates to the position below the planet carrier, the lubricating medium enters the first through hole; then the planet carrier continues to rotate, when the first through hole rotates to the planet carrier top, the lubricated medium relies on self gravity to carry to through first through hole and oil circuit structure on the teeth of a cogwheel of sun gear, at the rotatory in-process of sun gear, the lubricated medium can flow to the meshing region of sun gear and planet wheel along with the rotation of sun gear, has realized the effective lubrication to sun gear and planet wheel flank of tooth. The utility model discloses a self-lubricating of gear box does not set up oil pump and oil pipe isotructure, when having realized gear box work or idle state, also can realize the effective lubrication to sun gear and planet wheel flank of tooth, and simple structure, sparingly processing cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gearbox according to an embodiment of the present invention;

FIG. 2 is a front view of a gear box according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

fig. 4 is a cross-sectional view of an oil collecting plate provided in an embodiment of the present invention, the oil collecting plate being disposed on a web;

fig. 5 is a schematic partial structural view of a gear box according to an embodiment of the present invention.

The figures are labeled as follows:

1. a planet carrier; 11. a web; 111. a first through hole; 112. an oil stirring groove; 12. a column; 121. an oil path structure; 13. a first lubricating oil passage; 14. a second lubricating oil passage; 15. an oil stirring cavity;

2. a planet wheel; 3. a sun gear; 4. a first turret bearing; 5. a second turret bearing; 6. an oil collecting plate; 61. an inlet; 7. oil baffle plate.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The existing lubrication mode of the sun gear of the gearbox basically adopts forced lubrication, namely, an oil pipe is arranged in a planet carrier and is connected with an external oil pump to convey lubricating oil to the sun gear for lubrication. On one hand, the lubricating mode relates to the winding problem of an oil pipe when the planet carrier rotates, the structure is complex, and the requirement on machining precision is high. On the other hand, in the use, when the external oil pump lubricating system breaks down, or the gear box is in the no-load working condition, the oil pump of force lubrication generally can stop working, and the sun gear is in the no-lubrication working condition certainly to lead to, and then influences the life of gear box.

To solve the above problem, the present embodiment provides a gearbox comprising a housing, a planet carrier 1, planet wheels 2 and a sun wheel 3, as shown in fig. 1-3.

Specifically, a lubricating medium is arranged in the shell; the planet carrier 1 is arranged in the shell and is partially soaked in a lubricating medium. The planet carrier 1 comprises a column 12 and two webs 11, the two webs 11 are spaced and oppositely arranged, and the two webs 11 are connected through the column 12. In this embodiment, the two webs 11 and the upright 12 are integrally formed by a casting process. The planet wheel 2 and the sun wheel 3 are rotatably arranged between two webs 11, and the planet wheel 2 and the sun wheel 3 are meshed and connected. One of the webs 11 is provided with a first through hole 111, and the upright post 12 is provided with an oil path structure 121 therein, and the oil path structure 121 is communicated with the first through hole 111.

When the planet carrier 1 rotates, the web 11 stirs the lubricating medium in the shell, and when the first through hole 111 rotates to the lower part of the planet carrier 1, the lubricating medium enters the first through hole 111; then planet carrier 1 continues to rotate, when first through-hole 111 rotated to planet carrier 1 top, the lubricated medium relied on self gravity to carry on to the teeth of a cogwheel of sun gear 3 through first through-hole 111 and oil circuit structure 121, and at sun gear 3 rotatory in-process, the lubricated medium can flow to the meshing region of sun gear 3 and planet wheel 2 along with sun gear 3's rotation, has realized the effective lubrication to sun gear 3 and planet wheel 2 flank of tooth. This embodiment has realized the self-lubricating of gear box, does not set up structures such as oil pump and oil pipe, when having realized gear box work or no-load state, also can realize the effective lubrication to the 2 flank of tooth of sun gear 3 and planet wheel, and simple structure saves the processing cost.

Preferably, the gearbox further comprises a first turret bearing 4, the first turret bearing 4 being arranged on a first side of the planet carrier 1; be provided with first lubricated oil duct 13 in the planet carrier 1, first lubricated oil duct 13 one end communicates in oil piping structure 121, and the other end is directional first planet carrier bearing 4. When the first through hole 111 rotates to the upper side of the planet carrier 1, the lubricating medium is conveyed to the first turret bearing 4 through the first through hole 111, the oil path structure 121 and the first lubricating oil channel 13 by means of the self gravity, so that the first turret bearing 4 is lubricated.

Further preferably, the gearbox further comprises a second turret bearing 5, the second turret bearing 5 being arranged at a second side of the planet carrier 1; a second lubricating oil channel 14 is arranged in the planet carrier 1, one end of the second lubricating oil channel 14 is communicated with the cavity of the shell, and the other end of the second lubricating oil channel points to the second rotating frame bearing 5. During the rotation of the planet carrier 1, the lubricating medium can be delivered to the second turret bearing 5 through the second lubricating oil channel 14, so as to lubricate the second turret bearing 5. It should be noted that the first lubricating oil passage 13 and the second lubricating oil passage 14 may be provided separately or simultaneously.

Preferably, an oil mixing chamber 15 for increasing the picking-up amount of the lubricating medium is arranged at one end of the second lubricating oil channel 14 away from the second rotating stand bearing 5, the second lubricating oil channel 14 is communicated with the chamber of the housing through the oil mixing chamber 15, and the oil mixing chamber 15 rotates into the lubricating medium. In this embodiment, the diameter of the oil mixing chamber 15 is larger than the diameter of the second lubricating oil gallery 14, so the amount of the lubricating medium to be picked up can be increased. And in the present embodiment, the oil-agitating chamber 15 is provided on the outer side wall of the column 12.

Preferably, in the embodiment, an oil collecting plate 6 for increasing the amount of the collected lubricating medium is arranged on the outer side wall of the planet carrier 1, the oil collecting plate 6 is arranged on the outer side wall of the upright post 12, the cavity of the oil collecting plate 6 is communicated with the oil stirring cavity 15, an oil collecting cavity is formed between the oil collecting plate 6 and the oil stirring cavity 15, and when the oil collecting plate 6 rotates into the lubricating medium, on one hand, the oil collecting plate 6 is used for increasing the amount of the collected lubricating medium, and on the other hand, the lubricating medium collected by the oil stirring cavity 15 is prevented from flowing outwards, so that the lubricating effect of the second rotating frame bearing 5 is improved. In other embodiments, as shown in fig. 4, the second lubricating oil passage 14 is provided in the web 11, an opening of one end of the second lubricating oil passage 14 away from the second turret bearing 5 is provided on a side wall of the web 11, the oil collecting plate 6 is also provided on the side wall of the web 11 and communicates with the second lubricating oil passage 14, and the lubricating medium is fed into the second lubricating oil passage 14 through the oil collecting plate 6. It should be noted that the oil collecting plate 6 is fixed on the outer side wall of the planet carrier 1 by means of a connection manner such as bolting, bonding or welding, and the oil collecting plate 6 is provided with an inlet 61, and the inlet 61 is used for picking up a lubricating medium. The shape of the oil collecting plate 6 is not limited in this embodiment, and may be any shape.

Preferably in this implementation, the lubricating medium is lubricating grease, and the lubricating medium soaks the fourth of planet carrier 1, because lubricating grease has the viscidity, so first through-hole 111 when rotating in sun gear 3 below, lubricating grease can not break away from first through-hole 111 easily through self gravity, and first through-hole 111 portability predetermines the lubricating grease of volume and rotates to sun gear 3's top. Further preferably, the number of the planet wheels 2 is multiple, and the plurality of the planet wheels 2 are arranged on the sun wheel 3 in a spaced ring mode. The number of the upright columns 12 is also multiple, the plurality of upright columns 12 are annularly arranged on the sun wheel 3 and are positioned between every two planet wheels 2, and the number of the upright columns 12 is the same as that of the planet wheels 2.

Preferably, in this embodiment, the column 12 is a solid structure, the column 12 is provided with a second through hole, a first end of the second through hole is communicated with the first through hole 111, a second end of the second through hole points to the gear teeth of the sun gear 3, the second through hole forms an oil path structure 121, and the lubricating medium in the housing can be sequentially conveyed to the gear teeth of the sun gear 3 through the first through hole 111 and the second through hole.

Preferably, one end of the first through hole 111, which is far away from the second through hole, is connected with an oil stirring groove 112, and the oil stirring groove 112 is disposed on one side of the web 11, which is far away from the column 12. Due to the arrangement of the oil stirring groove 112, the carrying amount of a lubricating medium is increased, and the lubricating effect of the gear is improved. In this embodiment, the oil stirring groove 112 is disposed at the edge of the web 11, so as to reduce the depth of the lubricating medium; or the depth of the oil stirring groove 112 for immersing lubricating grease is increased, and the carrying capacity of the lubricating medium is increased. Further preferably, as shown in fig. 5, an oil baffle 7 is further disposed outside the oil stirring tank 112, the oil baffle 7 is welded and fixed to a side wall of the web 11 away from the column 12, the oil baffle 7 is disposed on one side of the oil stirring tank 112 close to the center of the web 11, an oil stirring cavity 15 is formed between the oil baffle 7 and the oil stirring tank 112, and an oil inlet is formed in a portion of the oil stirring tank 112 that is not shielded by the oil baffle 7. When the planet carrier 1 rotates, the oil mixing cavity 15 can carry more lubricating media, and the lubricating effect on the tooth surfaces of the sun gear 3 and the planet gear 2 is improved.

In the present embodiment, it is preferable that the diameters of the first through hole 111 and the second through hole are larger than the outer diameter of the endoscope probe. If the sun gear 3 needs to be inspected through the endoscope, the tooth surface of the sun gear 3 can be observed by passing the endoscope through the first through hole 111 and the second through hole under the state that the machine is stopped and the gear box does not need to be disassembled, so that the working state of the sun gear 3 can be judged, and the maintenance efficiency can be improved.

In other embodiments, the column 12 may also be a hollow structure to reduce the weight of the planet carrier 1, at this time, the column 12 is provided with a cavity with holes at two ends, the gear box further includes an oil delivery pipe, two ends of the oil delivery pipe are respectively fixed to the two holes, the oil delivery pipe is communicated with the first through hole 111, and the oil delivery pipe is provided to form the oil path structure 121. Preferably, defeated oil pipe's both ends are fixed in two trompils respectively through the connecting piece, and the connecting piece can be the screw thread cutting ferrule, and two trompils are the screw hole, and screw thread cutting ferrule threaded connection is in the trompil, and installs defeated oil pipe between two screw thread cutting ferrules. Or the two ends of the oil pipeline are respectively welded on the two openings. Or the two ends of the oil pipeline are respectively bonded with the two openings.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A gearbox, comprising:

the planet carrier (1) is arranged in the shell and is partially soaked in the lubricating medium, the planet carrier (1) comprises an upright post (12) and two webs (11), the two webs (11) are arranged at intervals and oppositely, and the two webs (11) are connected through the upright post (12);

the planet gear (2) and the sun gear (3) are rotatably arranged between the two webs (11), and the planet gear (2) and the sun gear (3) are in meshed connection;

one of the webs (11) is provided with a first through hole (111), an oil circuit structure (121) is arranged in the upright post (12), and the oil circuit structure (121) is communicated with the first through hole (111);

when the planet carrier (1) rotates, the lubricating medium can be conveyed to the gear teeth of the sun gear (3) through the first through hole (111) and the oil path structure (121).

2. Gearbox according to claim 1, further comprising a first turret bearing (4), said first turret bearing (4) being arranged on a first side of said planet carrier (1);

be provided with first lubricated oil duct (13) in planet carrier (1), first lubricated oil duct (13) one end communicate in oil circuit structure (121), the other end is directional first revolving rack bearing (4).

3. Gearbox according to claim 1, further comprising a second turret bearing (5), said second turret bearing (5) being arranged at a second side of said planet carrier (1);

a second lubricating oil channel (14) is arranged in the planet carrier (1), one end of the second lubricating oil channel (14) is communicated with the cavity of the shell, and the other end of the second lubricating oil channel points to the second rotating frame bearing (5).

4. A gearbox according to claim 3, characterised in that the end of the second lubrication duct (14) remote from the second turret bearing (5) is provided with an oil mixing chamber (15) for increasing the pick-up of the lubricating medium, the second lubrication duct (14) communicating with the chamber of the housing via the oil mixing chamber (15).

5. The gearbox according to claim 4, characterised in that an oil collecting plate (6) for increasing the pick-up of the lubricating medium is arranged on the outer side wall of the planet carrier (1), and the cavity of the oil collecting plate (6) is communicated with the oil mixing cavity (15).

6. Gearbox according to claim 1, characterised in that said upright (12) is a solid structure, said upright (12) being provided with a second through hole, a first end of said second through hole communicating with said first through hole (111), a second end of said second through hole being directed towards the teeth of said sun wheel (3), said second through hole forming said oil circuit structure (121).

7. The gearbox according to claim 6, characterized in that an oil stirring groove (112) is connected to one end of the first through hole (111) far away from the second through hole, and the oil stirring groove (112) is arranged on one side of the web (11) far away from the upright column (12).

8. The gearbox according to claim 7, characterized in that an oil baffle plate (7) is further arranged outside the oil stirring tank (112), the oil baffle plate (7) is arranged on one side of the oil stirring tank (112) close to the center of the web (11), an oil stirring cavity (15) is formed between the oil baffle plate (7) and the oil stirring tank (112), and an oil inlet is formed in a part of the oil stirring tank (112) which is not shielded by the oil baffle plate (7).

9. Gearbox according to claim 1, characterised in that the column (12) is provided with a chamber with holes at both ends, the gearbox further comprises an oil delivery pipe, both ends of which are respectively fixed to the two holes, and the oil delivery pipe is communicated with the first through hole (111), and the oil delivery pipe forms the oil path structure (121).

10. The gearbox according to claim 9, wherein both ends of the oil delivery pipe are respectively fixed to the two openings by a connector, and the connector is a threaded ferrule; or

Both ends of the oil pipeline are respectively welded to the two openings; or