Improved planetary gear

Abstract

The utility model discloses an improved planetary gear, including planetary carrier outer gear ring, mounting bracket, sun wheel and planetary gear, sun wheel is installed in the center of mounting bracket, and the planetary gear is evenly installed in mounting bracket and is cooperated with outer gear ring, sun wheel, be equipped with a plurality of even mounting hole around sun wheel on mounting bracket, one side installs planetary gear, and the other side installs mounting fixed pin, and the number of mounting hole is more than fixed pin, and mounting fixed pin has sleeve, and one end is equipped with limit ring, and limit ring is placed in the back of mounting hole, and the outer wall of sleeve has telescopic hole and installs locking head, and inside installs rotary adjusting column, and the inside of locking head has adjusting rack, and is engaged with the gear ring on adjusting column, the center of planetary gear has the butt joint groove, and the inner wall is equipped with locking groove, this design can depend on transmission ratio, load, and the number and position of flexible selection planetary gear, and the light and heavy load working condition of adaptation, improve the versatility, and the telescopic of locking head can be controlled to rotary adjusting column, realizes the quick disassembly of planetary gear without tools, and shortens maintenance time.

Description

Technical Field

[0001] This utility model specifically relates to an improved planetary gear. Background Technology

[0002] Planetary gear mechanisms, as efficient and compact transmission devices, are widely used in automotive transmissions, wind turbine generators, industrial robots, aerospace, and various precision reducers. Their basic structure typically includes a sun gear at the center, several planet gears revolving around the sun gear and rotating on their own axes, an external gear ring meshing with the planet gears, and a planet carrier supporting and connecting the planet gears. This coaxial, split-flow transmission characteristic gives it significant advantages such as compact structure, large transmission ratio, high load-bearing capacity, and smooth operation.

[0003] Currently, most planetary carriers are integrally cast, forged, or welded and then machined. The positional accuracy, coaxiality, and inter-hole angular precision requirements of the planetary gear shaft holes are extremely high. Integral machining on large or complex planetary carriers is technically challenging and costly, and is susceptible to material stress or machining deformation, making it difficult to consistently guarantee the accuracy of each hole system. Furthermore, if a planetary gear shaft hole or bearing mounting point on the planetary carrier fails due to wear or damage, the entire planetary carrier often needs to be replaced, resulting in high maintenance costs and long repair cycles. In addition, the integral structure is not conducive to the preload adjustment of planetary gear shafts or bearings and has poor adaptability to installation errors. Therefore, it is necessary to invent an improved planetary gear to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes an improved planetary gear.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: an improved planetary gear, comprising an outer gear ring of a planetary carrier and an internal mounting frame, wherein a sun gear is mounted at the center of the mounting frame, and a plurality of evenly spaced planetary gears are mounted inside the outer gear ring of the planetary carrier in cooperation with the sun gear, and the plurality of planetary gears are mounted on the mounting frame; The mounting bracket has multiple evenly spaced mounting holes around the sun gear mounting position. The planet gear is mounted on one side of each mounting hole, and a mounting pin is provided on the other side. The mounting pin mounts the planet gear on one side of the mounting bracket, and the number of mounting holes is greater than the number of mounting pins. The mounting pin includes a sleeve with a limiting ring at one end, which is positioned on the back of the mounting hole. The outer wall of the sleeve has multiple evenly spaced telescopic holes, each containing a locking head. A rotating adjusting column is installed inside the sleeve, with an adjusting rack at the end of the locking head inside the sleeve. The rotating adjusting column has a toothed ring that matches the multiple adjusting racks, which are circumferentially arranged on the toothed ring. The rotating adjusting column rotates within the sleeve. The planetary gear has a mating groove at its center that matches the sleeve, and the inner wall of the mating groove has multiple locking grooves that match the locking head.

[0006] Preferably, the mounting hole has an annular groove on its back side, and the inner side of the limiting ring has a sliding groove that matches the annular groove. A plurality of balls are installed in the sliding groove, and the plurality of balls are placed in the annular groove and the sliding groove.

[0007] Preferably, the inner and outer openings of the telescopic hole are provided with a limiting structure that matches the bottom edge of the locking head, and the adjusting rack is located on one side of the bottom of the locking head and is consistent with the overall installation direction of the locking head.

[0008] Preferably, the toothed ring is disposed on the outer wall of the rotating adjusting column, and the tooth height of the toothed ring does not exceed the outer wall of the rotating adjusting column. The end of the rotating adjusting column is provided with an adjusting knob, and the bottom of the rotating adjusting column is installed on the bottom of the inner side of the sleeve and rotates on the bottom of the inner side of the sleeve.

[0009] Preferably, the planetary gear has a rotating disk in the middle, and the docking groove is located in the middle of the rotating disk.

[0010] Preferably, the overall installation length of the sleeve does not exceed the mating groove opening at the front end of the planetary gear.

[0011] Preferably, the outer gear ring of the planet carrier, the planet gears, and the sun gear are fitted with racks.

[0012] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: 1. The mounting bracket of this utility model has more mounting holes than mounting pins, which can flexibly select the number and position of planetary gears according to the actual transmission ratio requirements and load size. It can meet the high-efficiency transmission requirements of fewer planetary gears under light load conditions, and also adapt to the load-sharing transmission requirements of more planetary gears under heavy load conditions, which greatly improves the versatility and adaptability of the gear structure. 2. This utility model achieves the extension and retraction of the locking head by rotating the adjustment knob and through the meshing transmission of the gear ring and the adjustment rack. When the locking head extends, it is embedded into the locking groove of the planetary gear mating groove to complete a firm assembly. When the locking head retracts, the planetary gear can be quickly removed. The entire disassembly and assembly process does not require special tools, making the operation simpler and effectively shortening the time for maintenance and replacement of planetary gears. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the planetary carrier external gear ring of this utility model; Figure 3 This is a schematic diagram of the disassembled planetary gear structure of this utility model; Figure 4 This is a schematic diagram of the mounting structure of the mounting and fixing pins of this utility model; Figure 5 This is a schematic diagram of the disassembled structure of the mounting and fixing pin of this utility model; Figure 6 This is a schematic diagram of the disassembled structure of the rotary adjustment column and locking head of this utility model.

[0015] Explanation of reference numerals in the attached figures: 1. Planetary carrier external gear ring; 2. Mounting bracket; 21. Mounting hole; 22. Annular groove; 3. Sun gear; 4. Planetary gears; 41. Connecting groove; 42. Locking groove; 43. Rotary disk; 5. Mounting fixing pin; 51. Sleeve; 52. Limiting ring; 521. Sliding groove; 53. Telescopic hole; 54. Locking head; 541. Adjusting rack; 55. Rotary adjusting column; 551. Gear ring; 552. Adjusting knob; 56. Ball bearing. Detailed Implementation

[0016] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0017] This utility model provides, for example Figure 1-6 An improved planetary gear shown includes an outer ring gear 1 of a planet carrier and an internal mounting frame 2. A sun gear 3 is mounted at the center of the mounting frame 2. Multiple planet gears 4 with even spacing are mounted inside the outer ring gear 1 of the planet carrier in cooperation with the sun gear 3. The multiple planet gears 4 are mounted on the mounting frame 2. Specifically, the mounting bracket 2 has a plurality of evenly spaced mounting holes 21 around the mounting position of the sun gear 3. The planet gear 4 is mounted on one side of the mounting hole 21, and the mounting pin 5 is provided on the other side. The mounting pin 5 mounts the planet gear 4 on one side of the mounting bracket 2, and the number of mounting holes 21 is greater than the number of mounting pins 5. Specifically, the mounting pin 5 includes a sleeve 51, one end of which is provided with a limiting ring 52, which is placed on the back of the mounting hole 21. The outer wall of the sleeve 51 is provided with a plurality of evenly spaced telescopic holes 53, and each telescopic hole 53 is provided with a locking head 54. A rotating adjusting column 55 is installed inside the sleeve 51. The end of the locking head 54 is provided with an adjusting rack 541 inside the sleeve 51. The rotating adjusting column 55 is provided with a gear ring 551 that matches the plurality of adjusting racks 541. The plurality of adjusting racks 541 are circumferentially arranged on the gear ring 551. The rotating adjusting column 55 rotates inside the sleeve 51. The center of the planetary gear 4 is provided with a mating groove 41 that matches the sleeve 51. The inner wall of the mating groove 41 is provided with a plurality of locking grooves 42 that match the locking head 54.

[0018] Specifically, the mounting hole 21 has an annular groove 22 on the back, and the inner side of the limiting ring 52 has a sliding groove 521 that matches the annular groove 22. Multiple balls 56 are installed in the sliding groove 521, and the multiple balls 56 are placed in the annular groove 22 and the sliding groove 521.

[0019] Specifically, the inner and outer openings of the telescopic hole 53 are provided with a limiting structure that matches the bottom edge of the locking head 54, and the adjusting rack 541 is located on one side of the bottom of the locking head 54 and is consistent with the overall installation direction of the locking head 54.

[0020] Specifically, the gear ring 551 is disposed on the outer wall of the rotating adjusting column 55, and the tooth height of the gear ring 551 does not exceed the outer wall of the rotating adjusting column 55. The end of the rotating adjusting column 55 is provided with an adjusting knob 552, and the bottom of the rotating adjusting column 55 is installed on the inner bottom of the sleeve 51 and rotates on the inner bottom of the sleeve 51.

[0021] Specifically, the planetary gear 4 has a rotating disk 43 in the middle, and the docking groove 41 is located in the middle of the rotating disk 43.

[0022] Specifically, the overall installation length of the sleeve 51 does not exceed the opening of the front end mating groove 41 of the planetary gear 4.

[0023] Specifically, the racks are fitted between the planet carrier outer gear ring 1, the planet gear 4, and the sun gear 3.

[0024] In this embodiment, the sun gear 3 is coaxially mounted at the center of the mounting bracket 2 to ensure that the sun gear can rotate freely. On the mounting bracket 2, on the outer circumference of the sun gear 3, there are multiple evenly spaced mounting holes 21. The number of mounting holes is greater than the number of mounting pins 5 to be assembled later, so as to reserve adjustment margin for different planet gear arrangements.

[0025] Specifically, the bottom of the rotating adjusting column 55 is installed on the inner bottom of the sleeve 51 to ensure stable rotation of the rotating adjusting column within the sleeve; the tooth height of the gear ring 551 on the outer wall of the rotating adjusting column 55 does not exceed the outer wall of the rotating adjusting column to avoid interference with the inner wall of the sleeve. Multiple locking heads 54 are correspondingly installed into the telescopic holes 53 on the side wall of the sleeve 51. One end of the locking head 54 located inside the sleeve is equipped with an adjusting rack 541, which meshes with the gear ring 551 of the rotating adjusting column, and the multiple adjusting racks 541 are evenly arranged along the circumference of the gear ring 551; limiting structures are provided at the inner and outer openings of the telescopic hole 53 to prevent the locking head 54 from falling out of the telescopic hole. A limiting ring 52 is fixed to one end of the sleeve 51. A sliding groove 521 is machined on the inner side of the limiting ring, and multiple balls 56 are installed in the sliding groove, completing the overall assembly of the mounting and fixing pin 5.

[0026] Specifically, the assembled mounting pin 5 is inserted into the mounting hole 21 of the mounting bracket 2, so that the limiting ring 52 fits against the back of the mounting hole 21. At the same time, the sliding groove 521 of the limiting ring is aligned with the ring groove 22 on the back of the mounting hole, so that the ball 56 is embedded between the ring groove 22 and the sliding groove 521, so that the mounting pin 5 can rotate flexibly relative to the mounting bracket, while reducing the rotational friction resistance.

[0027] Specifically, the planetary gear 4 has a rotating disk 43 in the middle, and a mating groove 41 is machined in the middle of the rotating disk. The inner wall of the mating groove has multiple locking grooves 42 that match the locking head 54. The mating groove 41 of the planetary gear 4 is aligned with the end of the sleeve 51 and inserted. At this time, the adjusting knob 552 at the end of the rotating adjusting column 55 is rotated. Through the meshing transmission between the gear ring 551 and the adjusting rack 541, the locking head 54 is driven to extend outward along the telescopic hole 53 and embed into the locking groove 42 in the inner wall of the mating groove 41, thus completing the rigid locking of the planetary gear 4 and the mounting fixing pin 5. The overall installation length of the sleeve 51 does not exceed the opening of the mating groove 41 to avoid interfering with the rotation of the planetary gear. In the above manner, multiple planetary gears 4 are evenly installed on the mounting bracket 2 to ensure that the planetary gears 4 simultaneously mesh with the teeth of the sun gear 3 and the outer gear ring 1 of the planet carrier.

[0028] Specifically, when the sun gear 3 or the external gear ring 1 of the planet carrier rotates as the power input end, the power is transmitted to multiple planet gears 4 through meshing. The planet gears 4 drive the mounting bracket 2 and the mounting fixing pin 5 to move synchronously, thereby realizing the deceleration, speed increase or reversing transmission function of the planetary gears. If it is necessary to adjust the number or spacing of the planet gears, the mounting fixing pin 5 can be reassembled by selecting the mounting hole 21 reserved on the mounting bracket 2.

[0029] In this embodiment, the number of mounting holes 21 on the mounting bracket 2 is greater than the number of mounting pins 5. The number and arrangement of planetary gears 4 can be flexibly selected according to different transmission ratios and load requirements, adapting to various working conditions and improving the versatility of the product.

[0030] In this embodiment, the extension and retraction of the locking head 54 can be controlled by rotating the adjustment knob 552, so as to realize the quick disassembly and locking of the planetary gear 4. Compared with the traditional bolt or key connection, no special tools are required and the assembly efficiency is higher. The locking head 54 is embedded in the locking groove 42 of the mating groove. The meshing locking method can withstand a larger transmission torque and prevent the planetary gear from loosening under high speed or heavy load conditions.

[0031] In this embodiment, the limiting ring 52 of the mounting pin 5 cooperates with the ring groove 22 of the mounting bracket through the ball 56, which converts sliding friction into rolling friction, greatly reducing the rotational resistance between the mounting pin and the mounting bracket, reducing operating noise and component wear; at the same time, the ball structure can radially limit the mounting pin, preventing the planetary gear from radially offset during transmission, and ensuring the meshing accuracy of the planetary gear with the sun gear and the external gear ring.

[0032] In this embodiment, the tooth height of the gear ring 551 of the rotating adjustment column does not exceed the outer wall of the column body, and the installation length of the sleeve 51 does not exceed the opening of the planetary gear docking groove. The layout of each component is compact, which effectively avoids interference between components during operation and improves the reliability of the overall structure.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An improved planetary gear, characterized in that: The device includes an outer gear ring (1) of a planet carrier and an internal mounting frame (2). A sun gear (3) is installed at the center of the mounting frame (2). Multiple planet gears (4) with uniform spacing are installed inside the outer gear ring (1) of the planet carrier in cooperation with the sun gear (3). The multiple planet gears (4) are installed on the mounting frame (2). The mounting bracket (2) has a plurality of evenly spaced mounting holes (21) around the mounting position of the sun gear (3). The planet gear (4) is mounted on one side of the mounting hole (21), and a mounting pin (5) is provided on the other side. The mounting pin (5) mounts the planet gear (4) on one side of the mounting bracket (2), and the number of mounting holes (21) is greater than the number of mounting pins (5). The mounting pin (5) includes a sleeve (51), one end of which is provided with a limiting ring (52), which is placed on the back of the mounting hole (21). The outer wall of the sleeve (51) is provided with a plurality of evenly spaced telescopic holes (53), each of which is equipped with a locking head (54). A rotating adjusting column (55) is installed inside the sleeve (51), and the end of the locking head (54) is provided with an adjusting rack inside the sleeve (51). 541), the rotating adjusting column (55) is provided with a gear ring (551) matching multiple adjusting racks (541), the multiple adjusting racks (541) are circumferentially arranged on the gear ring (551), the rotating adjusting column (55) rotates inside the sleeve (51), the planetary gear (4) is provided with a mating groove (41) matching the sleeve (51) at the center position, and the inner wall of the mating groove (41) is provided with multiple locking grooves (42) matching the locking head (54).

2. The improved planetary gear according to claim 1, characterized in that: The mounting hole (21) has an annular groove (22) on the back side, and the inner side of the limiting ring (52) has a sliding groove (521) that matches the annular groove (22). Multiple balls (56) are installed in the sliding groove (521), and the multiple balls (56) are placed in the annular groove (22) and the sliding groove (521).

3. The improved planetary gear according to claim 1, characterized in that: The telescopic hole (53) has a limiting structure at its inner and outer openings that matches the bottom edge of the locking head (54). The adjusting rack (541) is located on one side of the bottom of the locking head (54) and is aligned with the overall installation direction of the locking head (54).

4. The improved planetary gear according to claim 1, characterized in that: The toothed ring (551) is disposed on the outer wall of the rotating adjusting column (55), and the tooth height of the toothed ring (551) does not exceed the outer wall of the rotating adjusting column (55). The end of the rotating adjusting column (55) is provided with an adjusting knob (552), and the bottom of the rotating adjusting column (55) is installed on the inner bottom of the sleeve (51) and rotates on the inner bottom of the sleeve (51).

5. The improved planetary gear according to claim 1, characterized in that: The planetary gear (4) has a rotating disk (43) in the middle, and the docking groove (41) is located in the middle of the rotating disk (43).

6. The improved planetary gear according to claim 1, characterized in that: The overall installation length of the sleeve (51) does not exceed the groove of the docking slot (41) at the front end of the planetary gear (4).

7. The improved planetary gear according to claim 1, characterized in that: The outer gear ring (1) of the planet carrier, the planet gear (4) and the sun gear (3) are fitted with racks.

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