Planetary gear of speed reducer

Abstract

The utility model discloses a planetary gear of a speed reducer, and particularly relates to the technical field of mechanical manufacturing, which comprises a driving bevel gear arranged at the output end of a speed reducing motor, a main wheel shaft is arranged at the top of the driving bevel gear, and two driven bevel gears are meshed on the outer side of the driving bevel gear. The two driven bevel gears are symmetrically arranged with the driving bevel gear as the axis, the driven bevel gear on the left side is fixedly connected to the outer side of the main wheel shaft in a sleeving mode, and the driven bevel gear on the right side is rotationally connected to the outer side of the main wheel shaft in a sleeving mode. The double helical gears and the double helical gear rings are arranged, so that high-speed transmission can be better adapted, equipment damage and faults caused by vibration are reduced, a tooth surface contact line is long, and a plurality of teeth participate in meshing in the transmission process, so that the bearing capacity is greatly improved, the load of each pair of teeth can be reduced, and the transmission efficiency is improved. The service life of the gear is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, and more specifically, the utility model relates to a planetary gear of a speed reducer. Background Art

[0002] A planetary gear usually consists of a sun gear, planetary gears and a ring gear. The planetary gears rotate around the sun gear, just like planets orbiting the sun, hence the name. In a speed reducer, the planetary gear system can achieve a large transmission ratio, and at the same time has high efficiency and load-bearing capacity.

[0003] After retrieval, a Chinese patent with the authorization announcement number CN221299986U discloses a planetary gear structure of a planetary speed reducer. This structure reduces the large losses generated during transmission by arranging two groups of planetary gears and sun gears to cooperate with the internal gear ring, and improves the working efficiency.

[0004] However, when this structure is used, the cooperation between the ordinary gears and the internal gear ring cannot achieve an ideal effect, and large losses will also be caused during deceleration, and the load-bearing capacity is low. At the same time, the sun gear and the planetary gears are arranged in a row, making it impossible to guarantee the overall structural strength. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a planetary gear of a speed reducer to solve the problems raised in the above background art.

[0006] To achieve the above object, the utility model provides the following technical solution: A planetary gear of a speed reducer, including a driving bevel gear arranged at the output end of a speed reduction motor, a main shaft is provided at the top of the driving bevel gear, two driven bevel gears are meshed outside the driving bevel gear, and the two driven bevel gears are symmetrically placed with the axis of the driving bevel gear as the center;

[0007] The left driven bevel gear is fixedly sleeved outside the main shaft, and the right driven bevel gear is rotatably sleeved outside the main shaft;

[0008] A rotating shaft is fixedly provided outside the main shaft, one end of the rotating shaft is fixedly connected to the left driven bevel gear, the right cross-section of the rotating shaft is set to be cross-shaped, and a planetary gear assembly is arranged outside the rotating shaft;

[0009] The planetary gear assembly includes a first planetary gear member and a second planetary gear member, and both the first planetary gear member and the second planetary gear member are arranged outside the rotating shaft.

[0010] As a further description of the above technical solution:

[0011] The first planetary gear member includes a first sun gear, the first sun gear is arranged as a double helical gear, the first sun gear is fixedly connected to the rotating shaft, a first internal gear ring is arranged outside the first sun gear, and the first internal gear ring is arranged as a double helical gear ring.

[0012] As a further description of the above technical solution:

[0013] Three first planetary gears are meshed between the first internal gear ring and the first sun gear. The three first planetary gears are all arranged as double helical gears and form an equilateral triangle structure with the first sun gear as the center. A first sub-axle is installed inside each of the three first planetary gears, and one cross-section of the first sub-axle is arranged in a cross shape.

[0014] As a further description of the above technical solution:

[0015] First rotating shaft plates are fixedly arranged at both ends of the first sub-axle. A chevron-shaped fixing frame is arranged on one side of the first rotating shaft plate. One end of the first rotating shaft plate is rotatably connected to the chevron-shaped fixing frame. The rotating shaft penetrates through the two chevron-shaped fixing frames and extends to the outside, and is fixedly connected to the chevron-shaped fixing frames.

[0016] As a further description of the above technical solution:

[0017] The second planetary gear member includes a second sun gear. The second sun gear is fixedly connected to the rotating shaft and is arranged on one side of the first sun gear. The second sun gear is arranged as a double helical gear. A second internal gear ring is arranged outside the second sun gear, and the second internal gear ring is arranged as a double helical gear ring.

[0018] As a further description of the above technical solution:

[0019] A plurality of second planetary gears are meshed between the second internal gear ring and the second sun gear. The plurality of second planetary gears are all arranged as double helical gears and form a square structure with the second sun gear as the center.

[0020] As a further description of the above technical solution:

[0021] Second sub-axles are installed inside each of the plurality of second planetary gears. A second rotating shaft plate is fixedly arranged at one end of the second sub-axle. A cross-shaped fixing frame is arranged on one side of the second rotating shaft plate. One end of the second rotating shaft plate is rotatably connected to the cross-shaped fixing frame.

[0022] The technical effects and advantages of the present utility model:

[0023] 1. By setting double helical gears and double helical gear rings, compared with the prior art, it can better adapt to high-speed transmission, reduce equipment damage and failures caused by vibration, and since the tooth surface contact line is longer and multiple teeth are engaged simultaneously during transmission, its load-bearing capacity is greatly improved, the load on each pair of teeth can be reduced, and the service life of the gears can be extended.

[0024] 2. By arranging the gears in an equilateral triangle and a square, compared with the prior art, the sum of the interior angles of a triangle is fixed at 180°, which makes the shape of the triangle more stable and less likely to change. At the same time, when changing from three gears to four gears, the power transmission can be made more uniform, energy loss can be reduced, the load borne by each gear is relatively reduced, the friction and wear between the gears are reduced, and thus the transmission efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0026] Figure 2 It is a schematic diagram of the power structure of the present utility model.

[0027] Figure 3 It is a schematic diagram of the structure of the first planetary gear member of the present utility model.

[0028] Figure 4 It is an exploded schematic diagram of the first planetary gear member of the present utility model.

[0029] Figure 5 It is a schematic diagram of the structure of the second planetary gear member of the present utility model.

[0030] Figure 6 It is an exploded schematic diagram of the second planetary gear member of the present utility model.

[0031] Reference numerals are: 1, reduction motor; 2, driving bevel gear; 3, main wheel shaft; 4, driven bevel gear; 5, rotating shaft; 6, first sun gear; 7, first internal gear ring; 8, first planetary gear; 9, first secondary wheel shaft; 10, first rotating shaft plate; 11, herringbone fixing frame; 12, second sun gear; 13, second internal gear ring; 14, second planetary gear; 15, second secondary wheel shaft; 16, second rotating shaft plate; 17, cross-shaped fixing frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] As shown in the attached Figure 1-6 The planetary gear of a speed reducer shown in the figure includes a driving bevel gear 2 arranged at the output end of the speed reduction motor 1. A main wheel shaft 3 is provided at the top of the driving bevel gear 2. Two driven bevel gears 4 are meshed outside the driving bevel gear 2, and the two driven bevel gears 4 are symmetrically placed with the axis of the driving bevel gear 2 as the center;

[0034] The left driven bevel gear 4 is fixedly sleeved outside the main wheel shaft 3, and the right driven bevel gear 4 is rotatably sleeved outside the main wheel shaft 3;

[0035] A rotating shaft 5 is fixedly provided outside the main wheel shaft 3. One end of the rotating shaft 5 is fixedly connected to the left driven bevel gear 4. The right cross-section of the rotating shaft 5 is set as a cross shape, and a planetary gear assembly is provided outside the rotating shaft 5;

[0036] The planetary gear assembly includes a first planetary gear member and a second planetary gear member, and both the first planetary gear member and the second planetary gear member are arranged outside the rotating shaft 5.

[0037] In some embodiments, according to Figure 3 shown in the figure, the first planetary gear member includes a first sun gear 6. The first sun gear 6 is set as a double helical gear, which can better adapt to high-speed transmission, reduce equipment damage and failures caused by vibration. The first sun gear 6 is fixedly connected to the rotating shaft 5. A first internal gear ring 7 is provided outside the first sun gear 6. The first internal gear ring 7 is set as a double helical gear ring, which reduces the load on each pair of teeth and prolongs the service life of the gear.

[0038] In some embodiments, according to Figure 4 shown in the figure, three first planetary gears 8 are meshed between the first internal gear ring 7 and the first sun gear 6. The three first planetary gears 8 are all set as double helical gears and form an equilateral triangle structure with the first sun gear 6 as the center. The sum of the interior angles of the triangle is fixed at 180°, which makes the shape of the triangle more stable and not easy to change. A first wheel shaft 9 is installed inside each of the three first planetary gears 8, and one cross-section of the first wheel shaft 9 is set as a cross shape.

[0039] In some embodiments, according to Figure 4 shown in the figure, first rotating shaft plates 10 are fixedly provided at both ends of the first wheel shaft 9. A herringbone fixing frame 11 is provided on one side of the first rotating shaft plate 10. One end of the first rotating shaft plate 10 is rotatably connected to the herringbone fixing frame 11. The rotating shaft 5 passes through the two herringbone fixing frames 11 and extends to the outside, and is fixedly connected to the herringbone fixing frames 11.

[0040] In some embodiments, according to Figure 5As shown, the second planetary gear member includes a second sun gear 12, which is fixedly connected to the rotating shaft 5 and arranged on one side of the first sun gear 6. The second sun gear 12 is set as a double helical gear. An inner second gear ring 13 is arranged outside the second sun gear 12, and the inner second gear ring 13 is set as a double helical gear ring.

[0041] In some embodiments, according to Figure 5 As shown, a plurality of second planetary gears 14 are meshed between the inner second gear ring 13 and the second sun gear 12. The plurality of second planetary gears 14 are all set as double helical gears and form a square structure centered on the second sun gear 12, making the power transmission more uniform and reducing energy loss. The load borne by each gear is relatively reduced, reducing the friction and wear between the gears, thereby improving the transmission efficiency.

[0042] In some embodiments, according to Figure 6 As shown, a second axle 15 is installed inside each of the plurality of second planetary gears 14. One end of the second axle 15 is fixedly provided with a second rotating shaft plate 16. A cross-shaped fixing frame 17 is arranged on one side of the second rotating shaft plate 16, and the second rotating shaft plate 16 is rotatably connected to one end of the cross-shaped fixing frame 17.

[0043] Working principle of the present utility model: During the deceleration process of the speed reducer, the output of the deceleration motor 1 is transmitted to the two driven bevel gears 4 through the driving bevel gear 2. The two driven bevel gears 4 stably transmit the torque to the main axle 3 through a forward and reverse movement and then to the rotating shaft 5. The rotating shaft 5 drives the first sun gear 6, the second sun gear 12, the herringbone fixing frame 11 and the cross-shaped fixing frame 17 to rotate;

[0044] Since the rotating shaft 5 drives the herringbone fixing frame 11 and the cross-shaped fixing frame 17 to rotate, the plurality of first rotating shaft plates 10 and the plurality of second rotating shaft plates 16 perform circular motion around the rotating shaft 5 as the axis, thereby driving the three first planetary gears 8 and the plurality of second planetary gears 14 to slowly revolve around the first inner gear ring 7 and the second inner gear ring 13 around the first sun gear 6 and the second sun gear 12. Because the first sun gear 6 and the second sun gear 12 rotate due to the action of the rotating shaft 5, the three first planetary gears 8 and the plurality of second planetary gears 14 slowly rotate while revolving. At the same time, the plurality of first rotating shaft plates 10 and the plurality of second rotating shaft plates 16 also rotate, thereby forming an output with low speed and large torque.

Claims

1. A planetary gear of a speed reducer, comprising a driving bevel gear (2) arranged on the output end of a speed reduction motor (1), characterized in that: A main drive bevel gear (2) is provided with a main wheel shaft (3) at its top. Two driven bevel gears (4) are meshed outside the main drive bevel gear (2), and the two driven bevel gears (4) are symmetrically placed with respect to the axis of the main drive bevel gear (2). The left driven bevel gear (4) is fixedly sleeved outside the main wheel shaft (3), and the right driven bevel gear (4) is rotatably sleeved outside the main wheel shaft (3). A rotating shaft (5) is fixedly provided outside the main wheel shaft (3). One end of the rotating shaft (5) is fixedly connected to the left driven bevel gear (4). The right cross-section of the rotating shaft (5) is set to be cruciform, and a planetary gear assembly is provided outside the rotating shaft (5). The planetary gear assembly includes a first planetary gear member and a second planetary gear member, and both the first planetary gear member and the second planetary gear member are arranged outside the rotating shaft (5).

2. The planetary gear of a speed reducer according to claim 1, characterized in that: The first planetary gear member includes a first sun gear (6). The first sun gear (6) is set as a double helical gear. The first sun gear (6) is fixedly connected to the rotating shaft (5). A first internal gear ring (7) is provided outside the first sun gear (6), and the first internal gear ring (7) is set as a double helical gear ring.

3. The planetary gear of a speed reducer according to claim 2, characterized in that: Three first planetary gears (8) are meshed between the first internal gear ring (7) and the first sun gear (6). The three first planetary gears (8) are all set as double helical gears and form an equilateral triangle structure with the first sun gear (6) as the axis. First wheel shafts (9) are installed inside the three first planetary gears (8), and one cross-section of the first wheel shaft (9) is set to be cruciform.

4. The planetary gear of a speed reducer according to claim 3, characterized in that: First rotating shaft plates (10) are fixedly provided at both ends of the first wheel shaft (9). A herringbone fixing frame (11) is provided on one side of the first rotating shaft plate (10). The first rotating shaft plate (10) is rotatably connected to one end of the herringbone fixing frame (11). The rotating shaft (5) penetrates through the two herringbone fixing frames (11) and extends to the outside, and is fixedly connected to the herringbone fixing frames (11).

5. The planetary gear of a speed reducer according to claim 1, characterized in that: The second planetary gear member includes a second sun gear (12). The second sun gear (12) is fixedly connected to the rotating shaft (5) and is arranged on one side of the first sun gear (6). The second sun gear (12) is set as a double helical gear. A second internal gear ring (13) is provided outside the second sun gear (12), and the second internal gear ring (13) is set as a double helical gear ring.

6. The planetary gear of a speed reducer according to claim 1, characterized in that: A plurality of second planetary gears (14) are meshed between the second internal gear ring (13) and the second sun gear (12). The plurality of second planetary gears (14) are all set as double helical gears and form a square structure with the second sun gear (12) as the center.

7. The planetary gear of a speed reducer according to claim 1, characterized in that: Second wheel shafts (15) are installed inside the plurality of second planetary gears (14). A second rotating shaft plate (16) is fixedly provided at one end of the second wheel shaft (15). A cruciform fixing frame (17) is provided on one side of the second rotating shaft plate (16). The second rotating shaft plate (16) is rotatably connected to one end of the cruciform fixing frame (17).

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