CN212407529U

CN212407529U - Cantilever type planetary structure and gear box

Info

Publication number: CN212407529U
Application number: CN202021762617.4U
Authority: CN
Inventors: 杜树军; 陈武; 贺欢; 沈锦龙
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2020-08-21
Filing date: 2020-08-21
Publication date: 2021-01-26
Anticipated expiration: 2030-08-21

Abstract

The utility model relates to a gear box technical field discloses a cantilever type planetary structure and gear box. Wherein the cantilever type planet structure includes: the planet carrier is provided with an assembly hole; one end of the pin shaft is assembled in an assembling hole of the planet carrier in an interference manner; the planetary gear is rotatably sleeved on the pin shaft; the shaft blocking piece is detachably arranged at the other end of the pin shaft to axially limit the planetary gear. The utility model discloses a cantilever type planetary structure has cancelled the epaxial spacing boss of round pin, during the processing round pin axle, the diameter of required cylinder steel only need be greater than the diameter of machine-shaping's round pin axle slightly can, greatly increased the utilization ratio of raw and other materials, the axle fender spare of addding can realize spacing to planetary gear's axial, when needs are changed or are maintained planetary gear, only need keep off the piece from selling epaxial taking off with the axle, can take off planetary gear, need not to take off the round pin axle from the planet carrier, cantilever type planetary structure's maintainability has been strengthened, the maintenance cost is reduced.

Description

Cantilever type planetary structure and gear box

Technical Field

The utility model relates to a gear box technical field especially relates to a cantilever type planetary structure and gear box.

Background

In the prior art, as shown in fig. 1, for a pin 100 of a cantilever structure, one end of the pin 100 is in interference fit with a planet carrier 200 to be fixedly disposed on the planet carrier 200, a planet gear 300 is disposed on the pin 100, a limiting boss 1001 is disposed at the other end of the pin 100, and the limiting boss 1001 is used for axially limiting the planet gear 300.

When the pin shaft 100 is machined, cylindrical steel is generally used for turning, and due to the existence of the limiting boss 1001, the diameter of the cylindrical steel is required to be slightly larger than that of the limiting boss 1001, so that the utilization rate of raw materials is extremely low.

During assembly, the planet gear 300 is firstly mounted on the pin 100, and then the pin 100 is mounted on the planet carrier 200. When it is necessary to replace or maintain the planetary gear 300, the pin 100 is first detached from the carrier 200, and then the planetary gear 300 can be removed from the pin 100. Due to the interference fit between the pin 100 and the planet carrier 200, the pin 100 cannot be used continuously after being detached from the planet carrier 200, the pin 100 needs to be replaced again, and the maintainability is poor and the maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

Based on above, an object of the utility model is to provide a cantilever type planetary structure, the problem that the processing that has prior art exists when selling the axle the raw and other materials utilization ratio low, cantilever type planetary structure's maintainability is poor and maintenance cost is high is solved.

Another object of the utility model is to provide a gear box has cancelled the epaxial spacing boss of round pin, has increased the utilization ratio of raw and other materials, has improved the maintainability of gear box.

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

the utility model discloses a cantilever type planet structure, include: the planet carrier is provided with an assembly hole; one end of the pin shaft is assembled in the assembling hole in an interference fit mode; the planetary gear is rotatably sleeved on the pin shaft; the shaft blocking piece is detachably arranged at the other end of the pin shaft to axially limit the planetary gear.

As a preferred scheme of the cantilever type planetary structure, the other end of the pin shaft is provided with a limiting groove, the shaft blocking part is a check ring, and the check ring is arranged in the limiting groove to axially limit the planetary gear.

As a preferred scheme of the cantilever type planetary structure, the pin shaft is provided with an external thread, the shaft stopper is provided with an internal thread which is arranged corresponding to the external thread, and the shaft stopper is in threaded connection with the pin shaft.

As a preferable scheme of the cantilever type planet structure, a first washer is sleeved on the pin shaft, and the first washer is clamped between the planet gear and the shaft stopper.

As a preferable scheme of the cantilever type planetary structure, the number of the first washers is at least two, and the at least two first washers are sequentially stacked and clamped between the planetary gear and the shaft stopper.

As a preferable scheme of the cantilever type planetary structure, the cantilever type planetary structure further includes a bearing, the bearing is in clearance fit with the pin shaft, the planetary gear is in clearance fit with the bearing, and the first washer is clamped between the bearing and the shaft stopper.

As a preferred scheme of the cantilever type planet structure, a second gasket is sleeved on the pin shaft, the second gasket is clamped between the planet gear and the planet carrier, and the second gasket is clamped between the bearing and the planet carrier.

As a preferred scheme of the cantilever type planet structure, the cantilever type planet structure further comprises a positioning piece, the positioning piece is fixedly arranged at one end, far away from the planet gear, of the pin shaft, and the planet carrier is clamped between the positioning piece and the second washer.

As a preferred scheme of the cantilever type planet structure, the number of the assembling holes on the planet carrier is at least two, the number of the pin shafts is at least two, and the at least two pin shafts and the at least two assembling holes are arranged in a one-to-one correspondence mode.

The utility model also discloses a gear box, including above arbitrary scheme cantilever type planetary structure.

The utility model has the advantages that: the utility model discloses a cantilever type planetary structure has cancelled the epaxial spacing boss of round pin, during the processing round pin axle, the diameter of required cylinder steel only need be greater than the diameter of machine-shaping's round pin axle slightly can, greatly increased the utilization ratio of raw and other materials, the axle fender spare of addding can realize spacing to planetary gear's axial, when needs are changed or are maintained planetary gear, only need keep off the piece from selling epaxial taking off with the axle, can take off planetary gear, need not to take off the round pin axle from the planet carrier, cantilever type planetary structure's maintainability has been strengthened, the maintenance cost is reduced simultaneously.

The utility model discloses a gear box is owing to have in the preamble cantilever type planetary structure, reduced the waste of raw and other materials, increased the maintainability of gear box, reduced the maintenance 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 cross-sectional view of a cantilevered planetary structure provided by the prior art;

fig. 2 is a cross-sectional view of a cantilever type planetary structure provided in an embodiment of the present invention;

FIG. 3 is an enlarged view of FIG. 2 at A;

fig. 4 is a schematic view of a cantilever type planetary structure according to an embodiment of the present invention.

In the figure:

100. a pin shaft; 1001. a limiting boss; 200. a planet carrier; 300. a planetary gear;

1. a planet carrier; 2. a pin shaft; 3. a planetary gear; 4. a shaft stopper; 5. a first gasket; 6. a bearing; 7. a second gasket; 8. a positioning member.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 2 to 4, the present embodiment provides a cantilever type planetary structure for a gear box, the structure includes a planet carrier 1, a pin shaft 2, a planetary gear 3 and a shaft stopper 4, the planet carrier 1 is provided with an assembly hole (not shown in the figure), one end of the pin shaft 2 is interference-assembled in the assembly hole of the planet carrier 1, the planetary gear 3 is rotatably sleeved on the pin shaft 2, and the shaft stopper 4 is detachably disposed at the other end of the pin shaft 2 to axially limit the planetary gear 3.

The spacing boss on round pin axle 2 has been cancelled to the cantilever type planetary structure that this embodiment provided, during processing round pin axle 2, the diameter of required cylinder steel only need be slightly be greater than the diameter of processing fashioned round pin axle 2 can, greatly increased the utilization ratio of raw and other materials, the axle fender spare 4 of addding can realize spacing to planetary gear 3's axial, when needs are changed or are maintained planetary gear 3, only need take off axle fender spare 4 from round pin axle 2, planetary gear 3 can take off, need not to take off round pin axle 2 from planet carrier 1, the maintainability of cantilever type planetary structure has been strengthened, the maintenance cost has been reduced simultaneously.

The other end of the pin shaft 2 of this embodiment is provided with a limiting groove (not shown in the figure), the shaft stopper 4 is a retainer ring, the retainer ring is arranged in the limiting groove to axially limit the planetary gear 3, and the retainer ring of this embodiment is an elastic retainer ring. In other embodiments, an external thread may be provided on the pin shaft 2, an internal thread corresponding to the external thread is provided on the shaft stopper 4, and the shaft stopper 4 is screwed on the pin shaft 2.

In order to reduce the wear between the shaft stopper 4 and the planetary gear 3, as shown in fig. 2 to 4, a first washer 5 is sleeved on the pin shaft 2, and the first washer 5 is sandwiched between the planetary gear 3 and the shaft stopper 4. The number of the first washers 5 in this embodiment is two, the thicknesses of the two first washers 5 are different, and the two first washers 5 are sequentially stacked and clamped between the planetary gear 3 and the shaft stopper 4. In other embodiments, the thicknesses of the two washers may also be the same, the number of the first washers 5 is not limited to two in this embodiment, and may also be one or more than two, and the thickness of each first washer 5 may also be the same or different, specifically determined according to the distance from one end of the shaft stopper 4 close to the planet carrier 1 to the planet gear 3, so that the first washer 5 is interposed between the planet gear 3 and the shaft stopper 4.

As shown in fig. 2 and 3, the cantilever-type planetary structure of the present embodiment further includes a bearing 6, the bearing 6 is in clearance fit with the pin 2, the planetary gear 3 is in clearance fit with the bearing 6, the first washer 5 is further interposed between the bearing 6 and the shaft stopper 4, and the bearing 6 of the present embodiment is a needle bearing.

In order to reduce the wear between the planet carrier 1 and the planet gear 3, as shown in fig. 2, a second washer 7 is sleeved on the pin 2, the second washer 7 is clamped between the planet gear 3 and the planet carrier 1, and the second washer 7 is further clamped between the bearing 6 and the planet carrier 1. In addition, because the first washer 5 and the second washer 7 are both elastic, the planet gear 3 has a certain axial play along with the bearing 6 along the axial direction.

As shown in fig. 2, the cantilever-type planetary structure of the present embodiment further includes a positioning element 8, the positioning element 8 is fixedly disposed at an end of the pin 2 away from the planetary gear 3, the planetary carrier 1 is clamped between the positioning element 8 and the second washer 7, and the planetary gear 3 and the planetary carrier 1 are disposed between the positioning element 8 and the shaft stopper 4, so as to prevent the pin 2 from moving axially relative to the planetary carrier 1. Specifically, be equipped with the constant head tank that sets up along its self circumference on the round pin axle 2, setting element 8 installs in the constant head tank, and this setting element 8 is circlip. If the positioning element 8 is not arranged, the pin shaft 2 may move axially relative to the planet carrier 1, so that a gap between one end of the planet carrier 1, which is close to the planetary gear 3, and the shaft blocking element 4 is increased, and then the planetary gear 3 rocks in the rotating process, thereby reducing the safety of the cantilever type planetary structure.

When the cantilever type planet structure of the embodiment is installed, the specific steps are as follows:

step one, assembling a pin shaft 2 on a planet carrier 1 in an interference manner;

step two, mounting the positioning piece 8 on the pin shaft 2, and attaching the positioning piece 8 to the planet carrier 1 by the shaft end surface close to the planet carrier 1;

step three, assembling a second gasket 7 and a bearing 6 on the pin shaft 2 in sequence;

step four, assembling the planetary gear 3 on the bearing 6;

and step five, sequentially assembling the first gasket 5 and the shaft stop piece 4 on the pin shaft 2.

It should be noted that, the above-mentioned steps three to five may be performed before the step one. When the assembly is carried out, the shaft stopper 4, the first gasket 5 and the bearing 6 can be assembled on the pin shaft 2 in sequence, then the planet gear 3 is assembled on the bearing 6, the second gasket 7 is assembled on the pin shaft 2, and finally the first step and the second step are carried out. In other embodiments, the installation sequence of the cantilever-type planetary structure is not limited to the above definition, and other installation sequences may be adopted, and the installation sequence is appropriately adjusted according to actual conditions.

When maintenance is needed, the shaft baffle piece 4 and the first gasket 5 are detached from the pin shaft 2 in sequence, the planetary gear 3 and the bearing 6 can be taken down from the pin shaft 2, and maintainability is enhanced.

As shown in fig. 4, the number of the assembly holes on the planet carrier 1 of the present embodiment is three, the three assembly holes are uniformly distributed along the circumferential direction of the planet carrier 1, the number of the pin shafts 2 is three, and the three pin shafts 2 and the three assembly holes are arranged in a one-to-one correspondence manner. Certainly, in the utility model discloses an in other embodiments, the number of pilot hole can also be one, two or be more than three, and the number of round pin axle 2 is the same with the number of pilot hole to make round pin axle 2 and pilot hole one-to-one, the number of pilot hole on the planet carrier 1 specifically sets up according to actual need.

The embodiment also provides a gearbox comprising the cantilever type planetary structure.

The gearbox provided by the embodiment has the cantilever type planetary structure, so that the waste of raw materials is reduced, the maintainability of the gearbox is improved, and the maintenance cost is reduced.

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 cantilevered planetary structure, comprising:

the planet carrier (1) is provided with an assembly hole;

one end of the pin shaft (2) is assembled in the assembling hole in an interference fit mode;

the planetary gear (3) is rotatably sleeved on the pin shaft (2);

the shaft stopper (4) is detachably arranged at the other end of the pin shaft (2) to axially limit the planetary gear (3).

2. The cantilever-type planetary structure of claim 1, wherein the other end of the pin shaft (2) is provided with a limiting groove, and the shaft stopper (4) is a retainer ring which is arranged in the limiting groove to axially limit the planetary gear (3).

3. The cantilever-type planetary structure of claim 1, wherein the pin shaft (2) is provided with an external thread, the shaft stopper (4) is provided with an internal thread corresponding to the external thread, and the shaft stopper (4) is in threaded connection with the pin shaft (2).

4. The cantilever-type planetary structure of claim 1, wherein the pin (2) is sleeved with a first washer (5), and the first washer (5) is clamped between the planetary gear (3) and the shaft stopper (4).

5. The cantilever-type planetary structure of claim 4, wherein the number of the first washers (5) is at least two, and at least two first washers (5) are sequentially stacked and clamped between the planetary gear (3) and the shaft stopper (4).

6. The cantilevered planetary structure according to claim 4, further comprising a bearing (6), wherein said bearing (6) is clearance fitted with said pin (2), said planetary gear (3) is clearance fitted with said bearing (6), and said first washer (5) is sandwiched between said bearing (6) and said shaft stopper (4).

7. The cantilevered planetary structure according to claim 6, characterized in that a second washer (7) is sleeved on the pin (2), the second washer (7) is clamped between the planetary gear (3) and the planet carrier (1), and the second washer (7) is clamped between the bearing (6) and the planet carrier (1).

8. The cantilever-type planetary structure of claim 7, further comprising a positioning member (8), wherein the positioning member (8) is fixedly disposed at one end of the pin (2) far away from the planetary gear (3), and the planetary carrier (1) is clamped between the positioning member (8) and the second washer (7).

9. The cantilevered planetary structure according to claim 1, wherein the number of the assembling holes on the planet carrier (1) is at least two, the number of the pins (2) is at least two, and at least two of the pins (2) are arranged in one-to-one correspondence with at least two of the assembling holes.

10. A gearbox comprising a cantilevered planetary construction according to any of claims 1 to 9.