High-reliability right-angle planetary reducer

Abstract

The utility model discloses a high-reliability right-angle planetary reducer which comprises a machine shell, a first-stage speed reducing mechanism and a second-stage speed reducing mechanism, the first-stage speed reducing mechanism and the second-stage speed reducing mechanism are used for speed reduction, and the first-stage speed reducing mechanism and the second-stage speed reducing mechanism are both arranged in the machine shell. According to the high-reliability right-angle planetary speed reducer, speed reduction is conducted through cooperation of the first-stage speed reducer and the second-stage speed reducer, speed reduction stability is high, planet carrier internal spline output is achieved, and the high-reliability right-angle planetary speed reducer has the advantages of being high in rotating speed, low in torque input and low in rotating speed and large in torque output, free of over-positioning in overall installation, high in safety coefficient, high in working efficiency, high in bearing capacity and suitable for a large-capacity stirring machine; spiral bevel gears of the first-stage speed reducing mechanism are in right-angle transmission, axes of the two gears intersect, the crossed axis angle is 90 degrees, a right-angle arrangement mode is adopted, and the space utilization rate is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of speed reducer, concretely to a high reliability right angle planetary reducer. BACKGROUND

[0002] Double horizontal shaft mixer generally belongs to forced mixer, is suitable for various large, medium and small prefabricated component factory and highway, bridge, water conservancy, wharf, etc. industrial and civil building engineering, can stir dry hard concrete, plastic concrete, flowability concrete, light aggregate concrete and various mortar, is a kind of high reliability machine type. Reducing motor makes stirring shaft rotate along one direction through coupling, and the positive and negative two groups of spade pieces on stirring shaft stir material, so that material is fully stirred, thereby obtaining ideal stirring effect. However, most of the current reduction gearbox cannot meet the output requirements of mixer low speed, high stability and large torque.

[0003] The output shaft of the planetary reducer on the market mainly uses locking nuts or shaft retaining rings to lock and fix the bearing and the output shaft of the planetary reducer together. When the output shaft is subjected to a large impact load, the locking nut or shaft retaining ring is prone to loosen and fall off, thereby causing damage to the planetary reducer. This reliability problem is particularly prominent in industrial applications, especially in environments such as mixers that require low speed, high stability and large torque output. To address this technical problem, a patent with authorization announcement number CN218094138U discloses a high-reliability planetary reducer, which includes an output shaft, a bearing seat, an inner ring, a gear train and a locking piece. The upper end of the bearing seat is fixed with the inner ring, one end of the output shaft extends out of the planetary reducer body, and the other end is connected with the gear train. The gear train is engaged with the inner ring. The output shaft is rotatably connected with the upper and lower ends of the bearing seat through the first bearing and the second bearing respectively. The locking piece locks and fixes the first bearing and the output shaft. An auxiliary fixing structure is provided above the locking piece to prevent the locking piece from falling off. This technical solution provides a high-reliability planetary reducer that is not prone to loosening and falling off of the locking nut or shaft retaining ring during use, effectively solving the problem of easy damage of the planetary reducer under a large impact load in the prior art. However, although this patent has contributed to improving the reliability of the planetary reducer, the low speed, high stability and large torque output requirements of the reducer in industrial applications such as mixers have not been fully met. Therefore, it is necessary to design a high-reliability right-angle planetary reducer to solve the problem that the current reduction gearbox cannot meet the output requirements of mixer low speed, high stability and large torque, and to overcome the insufficient reliability of the existing planetary reducer under high load. SUMMARY

[0004] In view of the deficiencies of the prior art, the utility model provides a high-reliability right-angle planetary reducer, which solves the problem that most of the current reduction gearbox cannot meet the output requirements of mixer low speed, high stability and large torque.

[0005] To achieve the above object, the utility model provides the following technical scheme: A high reliability right angle planetary reducer, including casing, first speed reducer and second speed reducer for carrying out deceleration, first speed reducer and second speed reducer are all arranged in the inside of casing,

[0006] The casing includes first outside hexagonal bolt, first inside hexagonal cylinder head screw, first flat pad, front shell upper end cover, first O type sealing ring, screw rod, second flat pad, front shell, G three eighths plug head aluminum gasket, three eighths plug head, second O type sealing ring, second outside hexagonal bolt, one half plug head, G one half plug head aluminum gasket, hexagonal thin nut, first elastic pad, heavy lifting lug, middle shell, third O type sealing ring, gear ring, second inside hexagonal cylinder head screw, reinforced rear shell, third inside hexagonal cylinder head screw, positioning screw rod, cylindrical pin, fourth O type sealing ring, rear shell end cover, third flat pad, second elastic pad, fourth inside hexagonal cylinder head screw and skeleton oil seal, the first outside hexagonal bolt outside is equipped with first flat pad and is installed with the lower side position of the left end surface of front shell, the left end of first outside hexagonal bolt is installed with front shell upper end cover through first inside hexagonal cylinder head screw, the first O type sealing ring for sealing is arranged between front shell upper end cover and first outside hexagonal bolt, the screw rod outside is equipped with second flat pad and is installed with the left end surface of front shell on the upper side position, the three eighths plug head outside is equipped with G three eighths plug head aluminum gasket and is installed with the hole position of the left side surface of front shell, the outside of second outside hexagonal bolt is equipped with first flat pad, the second outside hexagonal bolt is installed with the left side of front shell, the middle shell is installed in the right side of front shell through the cooperation of second flat pad and second outside hexagonal bolt, the second O type sealing ring for sealing is arranged in the clearance between front shell and middle shell, the one half plug head outside is equipped with G one half plug head aluminum gasket, the one half plug head is installed with the hole position of the front side surface of front shell, the third O type sealing ring is arranged in the clearance between middle shell and gear ring, the third O type sealing ring is arranged in the clearance between gear ring and reinforced rear shell, the reinforced rear shell, gear ring and middle shell are installed through the cooperation of screw cap, first elastic pad, second inside hexagonal cylinder head screw, third inside hexagonal cylinder head screw and positioning screw rod, the left end of third inside hexagonal cylinder head screw stretches to the left side of middle shell, the heavy lifting lug is fixed in the left end of third inside hexagonal cylinder head screw through the cooperation of hexagonal thin nut and first elastic pad, the cylindrical pin is inserted between middle shell and reinforced rear shell and carries out auxiliary location and fixing to gear ring, the skeleton oil seal is installed in the right end inside of rear shell end cover, the rear shell end cover is installed in the right end surface of reinforced rear shell through the cooperation of fourth inside hexagonal cylinder head screw, second elastic pad and third flat pad, the fourth O type sealing ring for sealing is arranged between rear shell end cover and reinforced rear shell,

[0007] The primary speed reduction mechanism comprises a main transmission gear shaft, a passive spiral bevel gear and a central shaft, the main transmission gear shaft is installed in a vertical shaft hole in the bottom of the front shell through a bearing bracket, the central shaft is installed in a transverse shaft hole in the front shell through a bearing bracket, and the passive spiral bevel gear is clamped on the outer side of the central shaft, with the left side bevel gear of the passive spiral bevel gear meshing with the top end bevel gear of the main transmission gear shaft.

[0008] The secondary speed reduction mechanism comprises a gear ring, a planetary shaft, a planetary gear, a sun gear and a planet carrier, the sun gear is installed inside the gear ring, the left end of the sun gear is installed with the right end of the central shaft, the planetary gear is arranged inside the gear ring and at a position outside the sun gear, the planetary gear is meshed with the sun gear and the gear ring at the same time, the planetary shaft is inserted into the shaft center position of the planetary gear, the planet carrier is installed inside the reinforced rear shell through a bearing bracket, and the right end of the planetary shaft is inserted into the left end surface of the planet carrier.

[0009] Preferably, the main transmission gear shaft has 10 teeth, a large end surface module of 6.54mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial intersection angle of 90 degrees, a tooth width of 42mm and an installation distance of 120mm.

[0010] Preferably, the passive spiral bevel gear has 35 teeth, a large end surface module of 6.54mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial intersection angle of 90 degrees, a tooth width of 42mm and an installation distance of 57.2mm.

[0011] Preferably, the sun gear has 11 teeth, a module of 4.5mm, a pressure angle of 20 degrees, a tooth width of 97.54mm and a center distance of 78.5mm.

[0012] Preferably, the planetary gear has 22 teeth, a module of 4.5mm, a pressure angle of 20 degrees, a tooth width of 64mm and a center distance of 78.5mm.

[0013] Preferably, the gear ring has 58 teeth, a module of 4.5mm, a pressure angle of 20 degrees, a tooth width of 60mm and a center distance of 170mm.

[0014] Compared with the prior art, the high-reliability right-angle planetary reducer has the following beneficial effects:

[0015] 1. The high-reliability right-angle planetary reducer is reduced in speed through the cooperation of the primary speed reduction mechanism and the secondary speed reduction mechanism, has high speed reduction stability, has planetary gear output in the planet carrier, has the characteristics of high speed and low torque input and low speed and high torque output, has no over-positioning during overall installation, has high safety factor, has high work efficiency, has strong bearing capacity and is suitable for large-capacity mixers.

[0016] 2. The high-reliability right-angle planetary reducer, the helical bevel gear right-angle transmission of the primary speed reduction mechanism, the axes of the two gears intersect, the shaft intersection angle is 90 degrees, the straight-angle arrangement is adopted, and the space utilization is increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is an internal assembly structure schematic view of the high-reliability right-angle planetary reducer.

[0018] Fig. 2 It is an explosion view of the shell structure of the high-reliability right-angle planetary reducer.

[0019] The marks in the drawings are described as follows:

[0020] 1, first outer hexagonal bolt; 2, first inner hexagonal head screw; 3, first flat gasket; 4, front shell upper end cover; 5, first O-shaped sealing ring; 6, screw rod; 7, second flat gasket; 8, front shell; 9, G three-eighth plug aluminum gasket; 10, three-eighth plug; 11, second O-shaped sealing ring; 12, second outer hexagonal bolt; 13, one-half plug; 14, G one-half plug aluminum gasket; 15, hexagonal thin nut; 16, first elastic pad; 17, heavy lifting lug; 18, middle shell; 19, third O-shaped sealing ring; 20, gear ring; 21, second inner hexagonal head screw; 22, reinforced rear shell; 23, third inner hexagonal head screw; 24, positioning screw rod; 25, cylindrical pin; 26, fourth O-shaped sealing ring; 27, rear shell end cover; 28, third flat gasket; 29, second elastic pad; 30, fourth inner hexagonal head screw; 31, skeleton oil seal; 41, main transmission gear shaft; 42, passive helical bevel gear; 43, center shaft; 44, planetary shaft; 45, planetary gear; 46, sun gear; 47, planet carrier. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figs. 1-2 The utility model provides a kind of high-reliability right-angle planetary reducer, including shell, for reducing primary speed reduction mechanism and secondary speed reduction mechanism, the primary speed reduction mechanism and secondary speed reduction mechanism are all arranged in the interior of shell;

[0023] The shell comprises a first hexagonal bolt 1, a first internal hexagonal cylinder head screw 2, a first flat washer 3, a front shell upper end cover 4, a first O-shaped sealing ring 5, a screw 6, a second flat washer 7, a front shell 8, a G eight-thirds head aluminum washer 9, an eight-thirds head 10, a second O-shaped sealing ring 11, a second hexagonal bolt 12, a half head 13, a G half head aluminum washer 14, a hexagonal thin nut 15, a first elastic washer 16, a heavy lifting lug 17, a middle shell 18, a third O-shaped sealing ring 19, a gear ring 20, a second internal hexagonal cylinder head screw 21, a reinforced rear shell 22, a third internal hexagonal cylinder head screw 23, a positioning screw 24, a cylindrical pin 25, a fourth O-shaped sealing ring 26, a rear shell end cover 27, a third flat washer 28, a second elastic washer 29, a fourth internal hexagonal cylinder head screw 30, and a skeleton oil seal 31, the first hexagonal bolt 1 is sleeved with the first flat washer 3 and is installed at the lower side of the left end face of the front shell 8, the front shell upper end cover 4 is installed with the first hexagonal bolt 1 at the left end through the first internal hexagonal cylinder head screw 2, the first O-shaped sealing ring 5 for sealing is arranged between the front shell upper end cover 4 and the first hexagonal bolt 1, the screw 6 is sleeved with the second flat washer 7 and is installed at the upper side of the left end face of the front shell 8, the eight-thirds head 10 is sleeved with the G eight-thirds head aluminum washer 9 at the outside and is installed in the hole position on the left side of the surface of the front shell 8, the second hexagonal bolt 12 is sleeved with the first flat washer 3 at the outside, the second hexagonal bolt 12 is installed at the left side of the front shell 8, the middle shell 18 is installed at the right side of the front shell 8 through the cooperation of the second flat washer 7 and the second hexagonal bolt 12, the second O-shaped sealing ring 11 for sealing is arranged in the gap between the front shell 8 and the middle shell 18, the half head 13 is sleeved with the G half head aluminum washer 14 at the outside and is installed in the hole position on the front surface of the front shell 8, the third O-shaped sealing ring 19 is arranged in the gap between the middle shell 18 and the gear ring 20, the third O-shaped sealing ring 19 is arranged in the gap between the gear ring 20 and the reinforced rear shell 22, the reinforced rear shell 22, the gear ring 20 and the middle shell 18 are installed through the cooperation of the screw cap, the first elastic washer 16, the second internal hexagonal cylinder head screw 21, the third internal hexagonal cylinder head screw 23 and the positioning screw 24, the left end of the third internal hexagonal cylinder head screw 23 extends to the left side of the middle shell 18, the heavy lifting lug 17 is fixed at the left end of the third internal hexagonal cylinder head screw 23 through the cooperation of the hexagonal thin nut 15 and the first elastic washer 16, the cylindrical pin 25 is inserted between the middle shell 18 and the reinforced rear shell 22 to assist in limiting and fixing the gear ring 20, the skeleton oil seal 31 is installed inside the right end of the rear shell end cover 27, the rear shell end cover 27 is installed at the right end face of the reinforced rear shell 22 through the cooperation of the fourth internal hexagonal cylinder head screw 30, the second elastic washer 29 and the third flat washer 28, the fourth O-shaped sealing ring 26 for sealing is arranged between the rear shell end cover 27 and the reinforced rear shell 22;

[0024] The primary speed reduction mechanism comprises a main drive gear shaft 41, a passive spiral bevel gear 42 and a central shaft 43, the main drive gear shaft 41 is installed in the vertical shaft hole in the bottom of the front shell 8 through a bearing bracket, the central shaft 43 is installed in the transverse shaft hole in the front shell 8 through a bearing bracket, the passive spiral bevel gear 42 is clamped on the outside of the central shaft 43, and the left side bevel gear of the passive spiral bevel gear 42 is engaged with the top end bevel gear of the main drive gear shaft 41.

[0025] The secondary speed reduction mechanism comprises a gear ring 20, a planetary shaft 44, a planetary gear 45, a sun gear 46 and a planet carrier 47, the sun gear 46 is installed inside the gear ring 20, the left end of the sun gear 46 is installed with the right end of the central shaft 43, the planetary gear 45 is arranged inside the gear ring 20 and located outside the sun gear 46, the planetary gear 45 is engaged with the sun gear 46 and the gear ring 20 at the same time, the planetary shaft 44 is inserted into the shaft center position of the planetary gear 45, and the planet carrier 47 is installed inside the reinforced rear shell 22 through a bearing bracket, and the right end of the planetary shaft 44 is inserted into the left end surface of the planet carrier 47.

[0026] Further, the main drive gear shaft 41 has 10 teeth, a large end face module of 6.54 mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial angle of 90 degrees, a tooth width of 42 mm and an installation distance of 120 mm.

[0027] Further, the passive spiral bevel gear 42 has 35 teeth, a large end face module of 6.54 mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial angle of 90 degrees, a tooth width of 42 mm, an installation distance of 57.2 mm, and a speed reduction effect is realized through the tooth number difference between the main drive gear shaft 41 and the spiral bevel gear 42.

[0028] Further, the sun gear 46 has 11 teeth, a module of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 97.54 mm and a center distance of 78.5 mm.

[0029] Further, the planetary gear 45 has 22 teeth, a module of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 64 mm and a center distance of 78.5 mm.

[0030] Further, the gear ring 20 has 58 teeth, a module of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 60 mm and a center distance of 170 mm, and the sun gear 46 drives the planetary gear 45 to roll along the inside of the gear ring 20 when rotating.

[0031] In use, the power motor is installed at the bottom end of the main transmission gear shaft 41 through the output end of the power motor, the main transmission gear shaft 41 is rotated by the power motor, the passive helical bevel gear 42 is rotated by the main transmission gear shaft 41, the first-stage reduction effect is realized by the difference in the number of teeth between the main transmission gear shaft 41 and the passive helical bevel gear 42, the central shaft 43 in the inside of the passive helical bevel gear 42 is synchronously rotated when the passive helical bevel gear 42 is rotated, the central shaft 43 rotates the sun gear 46 at the right end, the sun gear 46 rotates the planetary gear 45 through the tooth head on the outer wall when the sun gear 46 is rotated, the planetary gear 45 rolls along the inner wall of the gear ring 20 under the restriction of the tooth head on the inner wall of the gear ring 20 when the planetary gear 45 is rotated, so that the planetary gear 45 rotates while revolving, the planetary gear 45 rotates the planetary shaft 44 while revolving, the planetary shaft 44 rotates the planetary carrier 47 while revolving, the second-stage reduction effect is realized by the cooperation of the sun gear 46, the planetary gear 45, the planetary shaft 44 and the planetary carrier 47, and finally the planetary carrier 47 drives the stirring equipment to rotate and stir at low speed.

[0032] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-reliability right-angle planetary reducer comprising a housing, a primary reduction mechanism and a secondary reduction mechanism for performing a reduction, characterized by: The primary speed reduction mechanism and the secondary speed reduction mechanism are arranged inside the casing; The primary speed reduction mechanism comprises a main transmission gear shaft (41), a passive spiral bevel gear (42) and a central shaft (43), the main transmission gear shaft (41) is installed in the vertical shaft hole at the bottom of the front casing (8) through a bearing bracket, the central shaft (43) is installed in the transverse shaft hole of the front casing (8) through a bearing bracket, the passive spiral bevel gear (42) is clamped on the outer side of the central shaft (43), and the left side bevel gear of the passive spiral bevel gear (42) is engaged with the top end bevel gear of the main transmission gear shaft (41). The casing comprises a first external hexagonal bolt (1), a first internal hexagonal cylindrical head screw (2), a first flat gasket (3), a front casing upper end cover (4), a first O-shaped sealing ring (5), a screw rod (6), a second flat gasket (7), a front casing (8), a G eighth of three head aluminum gasket (9), an eighth of three head (10), a second O-shaped sealing ring (11), a second external hexagonal bolt (12), a half head (13), a G half head aluminum gasket (14), a hexagonal thin nut (15), a first elastic gasket (16), a heavy lifting lug (17), a middle casing (18), a third O-shaped sealing ring (19), a gear ring (20), a second internal hexagonal cylindrical head screw (21), a reinforced rear casing (22), a third internal hexagonal cylindrical head screw (23), a positioning screw rod (24), a cylindrical pin (25), a fourth O-shaped sealing ring (26), a rear casing end cover (27), a third flat gasket (28), a second elastic gasket (29), a fourth internal hexagonal cylindrical head screw (30) and a skeleton oil seal (31), the first external hexagonal bolt (1) is sleeved with the first flat gasket (3) on the outside and is installed on the lower side position of the left end surface of the front casing (8), the front casing upper end cover (4) is installed on the left end of the first external hexagonal bolt (1) through the first internal hexagonal cylindrical head screw (2), and the first O-shaped sealing ring (5) for sealing is arranged between the front casing upper end cover (4) and the first external hexagonal bolt (1).

2. The high-reliability right-angle planetary reducer of claim 1, wherein: The screw rod (6) is sleeved with the second flat gasket (7) on the outside and is installed on the upper side position of the left end surface of the front casing (8), the eighth of three head (10) is sleeved with the G eighth of three head aluminum gasket (9) on the outside and is installed in the hole position formed in the left side surface of the front casing (8).

3. The high-reliability right-angle planetary reducer of claim 1, wherein: The second external hexagonal bolt (12) is sleeved with the first flat gasket (3) on the outside, the second external hexagonal bolt (12) is installed on the left side of the front casing (8), the middle casing (18) is installed on the right side of the front casing (8) through cooperation of the second flat gasket (7) and the second external hexagonal bolt (12), the second O-shaped sealing ring (11) for sealing is arranged in the gap between the front casing (8) and the middle casing (18), the half head (13) is sleeved with the G half head aluminum gasket (14) on the outside, and the half head (13) is installed in the hole position in the front surface of the front casing (8).

4. The high-reliability right-angle planetary reducer of claim 1, wherein: The third O-shaped sealing ring (19) is arranged in the gap between the middle shell (18) and the gear ring (20), and the third O-shaped sealing ring (19) is arranged in the gap between the gear ring (20) and the reinforced rear shell (22), and the reinforced rear shell (22), the gear ring (20) and the middle shell (18) are installed through cooperation of the screw cap, the first elastic pad (16), the second inner hexagonal cylindrical head screw (21), the third inner hexagonal cylindrical head screw (23) and the positioning screw rod (24).

5. The high-reliability right-angle planetary reducer of claim 1, wherein: The left end of the third inner hexagonal cylindrical head screw (23) extends to the left side of the middle shell (18), the heavy lifting lug (17) is fixed at the left end of the third inner hexagonal cylindrical head screw (23) through cooperation of the hexagonal thin nut (15) and the first elastic pad (16), and the cylindrical pin (25) is inserted between the middle shell (18) and the reinforced rear shell (22) to assist in limiting and fixing the gear ring (20).

6. The high-reliability right-angle planetary reducer of claim 1, wherein: The skeleton oil seal (31) is installed in the right end of the rear shell end cover (27), the rear shell end cover (27) is installed at the right end surface of the reinforced rear shell (22) through cooperation of the fourth inner hexagonal cylindrical head screw (30), the second elastic pad (29) and the third flat pad (28), and the fourth O-shaped sealing ring (26) is arranged between the rear shell end cover (27) and the reinforced rear shell (22) for sealing.

7. The high-reliability right-angle planetary reducer of claim 1, wherein: The secondary reduction mechanism comprises the gear ring (20), the planetary shaft (44), the planetary gear (45), the sun gear (46) and the planet carrier (47), the sun gear (46) is installed in the inside of the gear ring (20), the left end of the sun gear (46) is installed with the right end of the central shaft (43), the planetary gear (45) is arranged in the inside of the gear ring (20) and located at the position outside the sun gear (46), the planetary gear (45) is engaged with the sun gear (46) and the gear ring (20) at the same time, the planetary shaft (44) is inserted at the shaft position of the planetary gear (45), the planet carrier (47) is installed in the inside of the reinforced rear shell (22) through the bearing frame, and the right end of the planetary shaft (44) is inserted with the left end surface of the planet carrier (47).

8. The high-reliability right-angle planetary reducer of claim 1, wherein: The main transmission gear shaft (41) has 10 teeth, a large end surface modulus of 6.54 mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial intersection angle of 90 degrees, a tooth width of 42 mm and an installation distance of 120 mm.

9. The high-reliability right-angle planetary reducer of claim 1, wherein: The passive helical bevel gear (42) has 35 teeth, a large end surface modulus of 6.54 mm, a pressure angle of 20 degrees, a central spiral angle of 35 degrees, an axial intersection angle of 90 degrees, a tooth width of 42 mm and an installation distance of 57.2 mm.

10. The high-reliability right-angle planetary reducer of claim 7, wherein: The sun gear (46) has 11 teeth, a modulus of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 97.54 mm and a center distance of 78.5 mm.

11. The high-reliability right-angle planetary reducer of claim 7, wherein: The planetary gear (45) has 22 teeth, a modulus of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 64 mm and a center distance of 78.5 mm.

12. The high-reliability right-angle planetary reducer of claim 1, wherein: The gear ring (20) has 58 teeth, a modulus of 4.5 mm, a pressure angle of 20 degrees, a tooth width of 60 mm and a center distance of 170 mm.

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