Double-gear speed-adjustable planetary gear transmission mechanism

Abstract

The utility model relates to the technical field of gear transmission, and particularly discloses a double-gear speed-adjustable planetary gear transmission mechanism which comprises a shell, a planetary gear transmission structure is arranged in the shell, a driving shaft is arranged on the planetary gear transmission structure, and a rolling mechanism is arranged between the shell and the planetary gear transmission structure. The connecting mechanism is arranged between the planetary gear transmission structure and the driving shaft and is used for quickly disassembling and assembling the planetary gear transmission structure and the driving shaft; the friction force between the shell and the planetary gear transmission structure can be reduced through the arranged rolling mechanism, the planetary gear transmission structure is prevented from being abraded in the rotating working process, the driving shaft and the planetary gear transmission structure can be rapidly disassembled and assembled, and the planetary gear transmission structure and the column shaft can be conveniently maintained and replaced.

Description

Technical Field

[0001] This utility model relates to the field of gear transmission technology, specifically a dual-speed adjustable planetary gear transmission mechanism. Background Technology

[0002] Planetary gears are gear systems that, in addition to rotating around their own axis like fixed-axis gears, also have their axis of rotation rotating around the axes of other gears along with the planet carrier. Rotation around their own axis is called "rotation," and rotation around the axes of other gears is called "revolution," just like the planets in the solar system, hence the name.

[0003] In current planetary gear transmission mechanisms, the gear ring structure rotates continuously against the inner wall of the outer casing during operation. Due to the high friction between the two, the gear ring will be damaged due to frictional heat after prolonged operation. In addition, the transmission shaft in the planetary gear transmission mechanism is generally threaded to the sun gear. During the high-speed rotation of the transmission shaft, the transmission shaft is prone to loosening with the sun gear, thus affecting the transmission operation. To address this, we propose a dual-speed adjustable planetary gear transmission mechanism. Utility Model Content

[0004] The purpose of this invention is to provide a dual-speed adjustable planetary gear transmission mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dual-speed adjustable planetary gear transmission mechanism, comprising:

[0006] The outer casing has a planetary gear transmission structure inside, and the planetary gear transmission structure is equipped with a drive shaft.

[0007] Also includes:

[0008] A rolling mechanism is disposed between the housing and the planetary gear transmission structure to reduce the friction between the planetary gear transmission structure and the housing.

[0009] A connecting mechanism is provided between the planetary gear transmission structure and the drive shaft, and is used for quick assembly and disassembly of the planetary gear transmission structure and the drive shaft.

[0010] Preferably, the planetary gear transmission structure includes a planet carrier, a sun gear rotatably disposed in the middle of the planet carrier, planetary teeth rotatably disposed at the edge of the planet carrier and meshing with the sun gear, and a gear ring rotatably disposed on the inner sidewall of the outer shell and meshing with several planetary teeth.

[0011] Preferably, the rolling mechanism includes a ball rotatably disposed on the outer wall of the gear ring and a rolling groove formed on the inner side wall of the housing, wherein the ball is rotatably disposed inside the rolling groove.

[0012] Preferably, the connecting mechanism includes a threaded post disposed at the bottom of the drive shaft and a threaded sleeve with threads disposed outside the threaded post. The top of the planetary carrier is provided with a first mounting groove that mates with the threaded post, and the outer side of the first mounting groove is provided with a second mounting groove that mates with the threaded sleeve.

[0013] Preferably, the internal threads of the first mounting groove and the second mounting groove have opposite directions of rotation.

[0014] Preferably, the housing is further provided with an oil injection mechanism, which includes an oil storage cavity opened inside the housing, a plurality of oil outlet holes opened on the inner sidewall of the oil storage cavity, and a sealing plug that is snapped into the oil inlet hole on the surface of the housing.

[0015] Preferably, the outer casing has a plurality of equally spaced heat dissipation holes on its sidewall.

[0016] This utility model has at least the following beneficial effects:

[0017] 1. The planetary gear transmission mechanism enables speed change of the output shaft. At the same time, the rolling mechanism reduces the friction between the planetary gear transmission structure and the main housing, preventing wear caused by prolonged rotation inside the housing. This improves the service life of the planetary gear transmission structure and solves the problem of wear or damage due to temperature rise caused by prolonged rotation inside the housing in existing technologies.

[0018] 2. The connection mechanism allows for quick installation and disassembly of the drive shaft and planetary gear transmission structure. Furthermore, the drive shaft will not loosen from the planetary gear transmission structure even during prolonged rotation, regardless of forward or reverse rotation or slight vibration, thereby improving the stability of equipment operation. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 This is a diagram of the internal structure of the outer shell of this utility model;

[0022] Figure 4 This is a structural diagram of the planetary gear transmission structure of this utility model;

[0023] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0024] Figure 6 This utility model Figure 4 Enlarged structural diagram at point B in the middle.

[0025] In the diagram: 1. Outer shell; 2. Planetary gear transmission structure; 201. Gear ring; 202. Planetary carrier; 203. Sun gear; 204. Planetary gear; 3. Drive shaft; 4. Rolling mechanism; 401. Ball bearing; 402. Rolling groove; 5. Connecting mechanism; 501. Threaded post; 502. Threaded sleeve; 503. First mounting groove; 504. Second mounting groove; 6. Oil injection mechanism; 601. Oil reservoir; 602. Oil outlet; 603. Sealing plug; 7. Heat dissipation hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-6 The present invention provides the following technical solution:

[0028] Example 1,

[0029] A dual-speed adjustable planetary gear transmission mechanism, including:

[0030] The outer casing 1 has a planetary gear transmission structure 2 inside. The planetary gear transmission structure 2 is equipped with a drive shaft 3. The drive shaft 3 is mounted on the planetary gear transmission structure 2. When the drive shaft 3 is rotated, the speed of the output shaft can be adjusted through the planetary gear transmission structure 2.

[0031] Also includes:

[0032] The rolling mechanism 4 is set between the outer shell 1 and the planetary gear transmission structure 2. It is used to reduce the friction between the planetary gear transmission structure 2 and the outer shell 1. When the drive shaft 3 rotates and drives the planetary gear transmission structure 2 to rotate, the planetary gear transmission structure 2 will rotate along the inner wall of the outer shell 1. At this time, the rolling mechanism 4 can reduce the friction between the two and prevent the planetary gear transmission structure 2 from being damaged due to excessive friction.

[0033] The connecting mechanism 5 is located between the planetary gear transmission structure 2 and the drive shaft 3. It is used to quickly assemble and disassemble the planetary gear transmission structure 2 and the drive shaft 3. When it is necessary to disassemble, maintain or replace the drive shaft 3 or the planetary gear transmission structure 2, the two can be disassembled through the connecting mechanism 5.

[0034] Specifically, the planetary gear transmission structure 2 includes a planet carrier 202, a sun gear 203 rotatably disposed in the middle of the planet carrier 202, planet gears 204 rotatably disposed at the edge of the planet carrier 202 and meshing with the sun gear 203, and a gear ring 201 rotatably disposed on the inner side wall of the outer casing 1 and meshing with a plurality of planet gears 204.

[0035] The rolling mechanism 4 includes a ball 401 rotatably disposed on the outer wall of the gear ring 201 and a rolling groove 402 formed on the inner side wall of the outer casing 1, with the ball 401 rotatably disposed inside the rolling groove 402.

[0036] Rotating the drive shaft 3 can drive the sun gear 203 to rotate, which in turn drives several planetary gears 204 to rotate. If the planetary gears 204 are limited, they will drive the gear ring 201 to rotate. At this time, the gear ring 201 will rotate along the inner wall of the outer shell 1. Because the ball 401 will roll between the outer shell 1 and the rolling groove 402, the friction between the gear ring 201 and the inner wall of the outer shell 1 can be reduced, preventing the outer wall of the gear ring 201 from being damaged by long-term friction with the inner wall of the outer shell 1. It can also prevent the problem of excessive friction causing temperature rise and damage to parts. Therefore, it can improve the service life of the planetary gear transmission structure 2.

[0037] In addition, the side wall of the outer casing 1 is provided with several equally spaced heat dissipation holes 7; the heat dissipation holes 7 can dissipate heat inside the outer casing 1, preventing the planetary gear transmission structure 2 from being damaged due to excessive temperature rise during long-term rotation inside the outer casing 1.

[0038] According to the above embodiments, Embodiment Two

[0039] The connecting mechanism 5 includes a threaded post 501 disposed at the bottom of the drive shaft 3 and a threaded sleeve 502 with threads disposed outside the threaded post 501. The planetary carrier 202 has a first mounting groove 503 on its top that mates with the threaded post 501. A second mounting groove 504 is disposed outside the first mounting groove 503 that mates with the threaded sleeve 502. The threads inside the first mounting groove 503 and the second mounting groove 504 have opposite directions of rotation.

[0040] When it is necessary to install the drive shaft 3 and the planetary gear transmission structure 2, first screw the threaded post 501 at the bottom of the drive shaft 3 into the first mounting groove 503 at the top of the planetary carrier 202, and then rotate the threaded sleeve 502 outside the threaded post 501 in the opposite direction so that the threaded sleeve 502 is screwed into the second mounting groove 504 at the top of the planetary carrier 202. Because the threads of the threaded post 501 and the threaded sleeve 502 are in opposite directions, no matter which direction the drive shaft 3 rotates or if there is a slight vibration, they will get closer and closer. This can prevent the drive shaft 3 from loosening with the planetary gear transmission structure 2 after long-term high-speed rotation, thus affecting the normal operation of the equipment.

[0041] According to the above embodiments, in Embodiment 3,

[0042] The outer casing 1 is also equipped with an oil injection mechanism 6. The oil injection mechanism 6 includes an oil storage chamber 601 inside the outer casing 1, several oil outlet holes 602 on the inner wall of the oil storage chamber 601, and a sealing plug 603 that is snapped into the oil inlet hole on the surface of the outer casing 1. The sealing plug 603 can be opened to inject lubricating oil into the oil storage chamber 601 beforehand, and then the sealing plug 603 can be closed. When the planetary gear transmission structure 2 causes the outer casing 1 to vibrate during operation, the lubricating oil will slowly flow out through the small-diameter oil outlet holes 602 under the action of inertia, and flow along the inner wall of the outer casing 1 to the inner side of the gear ring 201. This can automatically lubricate the gear ring 201, planetary gears 204 and sun gears 203, prevent the planetary gear transmission structure 2 from jamming, and lubricate it without stopping the transmission structure. The operation is simple and saves time.

[0043] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-speed adjustable planetary gear transmission mechanism, comprising: The outer casing (1) has a planetary gear transmission structure (2) inside, and a drive shaft (3) is provided on the planetary gear transmission structure (2). Its characteristic is that it further includes: A rolling mechanism (4) is provided between the outer shell (1) and the planetary gear transmission structure (2) to reduce the friction between the planetary gear transmission structure (2) and the outer shell (1); The connecting mechanism (5) is located between the planetary gear transmission structure (2) and the drive shaft (3) and is used to quickly assemble and disassemble the planetary gear transmission structure (2) and the drive shaft (3).

2. The dual-speed adjustable planetary gear transmission mechanism according to claim 1, characterized in that: The planetary gear transmission structure (2) includes a planet carrier (202), a sun tooth (203) rotatably disposed in the middle of the planet carrier (202), a planet tooth (204) rotatably disposed at the edge of the planet carrier (202) and meshing with the sun tooth (203), and a gear ring (201) rotatably disposed on the inner side wall of the outer shell (1) and meshing with several planet teeth (204).

3. The dual-speed adjustable planetary gear transmission mechanism according to claim 2, characterized in that: The rolling mechanism (4) includes a ball (401) rotatably disposed on the outer wall of the gear ring (201) and a rolling groove (402) opened on the inner side wall of the outer shell (1), wherein the ball (401) is rotatably disposed inside the rolling groove (402).

4. The dual-speed adjustable planetary gear transmission mechanism according to claim 3, characterized in that: The connecting mechanism (5) includes a threaded post (501) disposed at the bottom of the drive shaft (3) and a threaded sleeve (502) with threads disposed outside the threaded post (501). The planetary carrier (202) has a first mounting groove (503) on its top that mates with the threaded post (501), and a second mounting groove (504) on the outside of the first mounting groove (503) that mates with the threaded sleeve (502).

5. The dual-speed adjustable planetary gear transmission mechanism according to claim 4, characterized in that: The internal threads of the first mounting groove (503) and the second mounting groove (504) have opposite directions.

6. The dual-speed adjustable planetary gear transmission mechanism according to claim 5, characterized in that: The outer shell (1) is also provided with an oil injection mechanism (6), which includes an oil storage cavity (601) opened inside the outer shell (1), a number of oil outlet holes (602) opened on the inner side wall of the oil storage cavity (601), and a sealing plug (603) snapped onto the oil inlet hole on the surface of the outer shell (1).

7. The dual-speed adjustable planetary gear transmission mechanism according to claim 1, characterized in that: The outer shell (1) has several equidistantly distributed heat dissipation holes (7) on its side wall.

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