Planetary gear transmission speed reducer with common gear ring

Abstract

The utility model discloses a common-gear-ring planetary gear transmission speed reducer, and relates to the technical field of planetary speed reducers. A motor mounting cavity is formed in one side of an inner cavity of a shell, and a motor and a limiting supporting seat used for sealing and fixing the motor are arranged in the motor mounting cavity; a motor output shaft of the motor penetrates out of the limiting supporting seat, a driving gear is arranged on a shaft body of the motor output shaft, a planetary gear mounting cavity is formed in the other side of the inner cavity of the shell, and an inner gear ring is arranged in the planetary gear mounting cavity; a first planetary gear assembly and a second planetary gear assembly which are coaxially arranged and meshed with the inner gear ring are sequentially arranged in the inner gear ring from top to bottom, and a driven gear which is in transmission fit with the driving gear and used for driving the first planetary gear assembly and the second planetary gear assembly to rotate synchronously is arranged on the upper portion of the planetary gear mounting cavity. According to the utility model, the structure of the speed reducer is more compact, the bearing capacity of the speed reducer is effectively improved, and the noise and vibration of the speed reducer are reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to planetary reducer technical field especially relates to a common gear ring planetary gear drive speed reducer. BACKGROUND

[0002] The planetary reducer is widely used in servo motor, stepping motor, DC motor and other transmission systems with the advantages of small volume, high transmission efficiency, wide speed reduction range, high precision and the like.

[0003] At present, the following problems exist in the production and processing of the planetary reducer:

[0004] The traditional reducer design often adopts a split structure, that is, the motor and the reducer are manufactured and installed separately, which not only increases the overall volume and weight of the equipment, but also makes the transportation and installation process more complex.

[0005] In the design of the previous planetary gear transmission system, multiple independent inner gear rings may be configured to achieve different speed reduction ratios, which not only increases the use of raw materials, but also increases the processing difficulty and manufacturing cost.

[0006] The traditional reducer design usually does not fully consider the damping measures, which may cause large noise and vibration during operation, affecting the working environment and the service life of the equipment.

[0007] Therefore, a common gear ring planetary gear drive speed reducer is needed to overcome the above-mentioned problems. SUMMARY

[0008] In order to overcome the deficiencies in the background art, the utility model discloses a common gear ring planetary gear drive speed reducer, which not only makes the structure of the speed reducer more compact, reduces the manufacturing and assembly difficulty of the speed reducer, but also effectively improves the carrying capacity of the speed reducer and reduces the noise and vibration of the speed reducer.

[0009] To achieve the above-mentioned purposes, the utility model adopts the following technical solutions:

[0010] The application discloses a kind of co-toothed ring planetary gear drive speed reducer, including shell, and buckle in the upper open upper cover of shell, the side of shell inner cavity is equipped with motor installation cavity, motor installation cavity is equipped with motor and the limiting support seat for sealing and fixed motor, motor output shaft of motor passes through limiting support seat, and main drive gear is equipped on its shaft body, the other side of shell inner cavity is equipped with planetary gear installation cavity, planetary gear installation cavity is equipped with inner toothed ring, inner toothed ring is sequentially equipped with first planetary gear assembly and second planetary gear assembly by from top to bottom in inner toothed ring, and first planetary gear assembly and second planetary gear assembly are all engaged with inner toothed ring and arranged coaxially, upper portion of planetary gear installation cavity is equipped with driven gear transmission cooperation, and is used to drive first planetary gear assembly and second planetary gear assembly synchronous rotation, the spline of planetary gear installation cavity lower part is equipped with transmission connection with second planetary gear assembly, and penetrates to shell outside.

[0011] Further, the outer wall of the inner toothed ring is uniformly distributed with several installation grooves, and the semi-circular damping pins are arranged in the installation grooves and in interference contact with the inner wall of the planetary gear installation cavity.

[0012] Further, the planetary gear installation cavity is provided with a central shaft coaxially arranged with the first planetary gear assembly and the second planetary gear assembly and penetrating the first planetary gear assembly and the second planetary gear assembly in sequence, and the driven gear is installed on the upper end of the shaft body of the central shaft and drives the central shaft to synchronously rotate the first planetary gear assembly and the second planetary gear assembly.

[0013] Further, the first planetary gear assembly comprises a first carrier, a first central gear and a plurality of first planetary gears rotatably installed on the first carrier, the first central gear is coaxially arranged with the central shaft and is driven to rotate by the central shaft, the plurality of second planetary gears are uniformly distributed around the first central gear and are in meshing transmission with the first central gear, and the outer edges of the plurality of first planetary gears are in meshing transmission with the inner toothed ring.

[0014] Further, the second planetary gear assembly comprises an output end cover, a second central gear and a plurality of second planetary gears rotatably installed on the output end cover, the second central gear is coaxially arranged with the central shaft and is driven to rotate by the central shaft, the plurality of second planetary gears are uniformly distributed around the second central gear and are in meshing transmission with the second central gear, and the outer edges of the plurality of second planetary gears are in meshing transmission with the inner toothed ring.

[0015] Further, the number of the first planetary gears in the first planetary gear assembly is different from the number of the second planetary gears in the second planetary gear assembly.

[0016] Further, the limiting support seat is rotatably installed with a transmission shaft between the motor output shaft and the central shaft and parallel to the central shaft, and the transmission shaft is provided with a gear wheel in meshing transmission with the main drive gear and the driven gear.

[0017] Further, the upper surfaces of the limiting support seats are uniformly provided with a plurality of first damping rubber blocks abutting against the upper cover and used for damping protection of the limiting support seats and the motor.

[0018] Further, the lower surface of the upper cover is provided with a plurality of second damping rubber blocks abutting against the upper end surface of the inner gear ring and used for damping protection of the inner gear ring.

[0019] Further, the lower surface of the upper cover is respectively provided with a motor output shaft mounting hole, a central shaft mounting hole and a transmission shaft mounting hole corresponding to the upper ends of the motor output shaft, the central shaft and the transmission shaft.

[0020] Compared with the prior art, the utility model has the advantages that: the motor is directly installed in the shell by arranging the motor mounting cavity in the shell, the split structure of the traditional speed reducer and the motor is avoided, thereby facilitating the transportation and installation of the speed reducer.

[0021] The limiting support seats are arranged, so that the motor can be fixed and sealed.

[0022] The two groups of planetary gear assemblies share one inner gear ring, so that the structure of the speed reducer is more compact, the use of raw materials is reduced, and the machining difficulty of the inner gear ring is reduced.

[0023] The planetary gear assemblies with different numbers of planetary gears can uniformly distribute the load, improve the carrying capacity, reduce noise and vibration, and make the speed reducer more compact and light.

[0024] The semicircular damping pins and the second damping rubber blocks are arranged, so that the installation of the inner gear is more stable, and the inner gear ring can be effectively protected.

[0025] The first damping rubber blocks are arranged, so that the stability of the motor can be effectively improved, the motor and the limiting support seats can be protected, and the operation of the speed reducer is ensured.

[0026] The utility model not only makes the structure of the speed reducer more compact, reduces the manufacturing and assembly difficulty of the speed reducer, but also effectively improves the carrying capacity of the speed reducer and reduces the noise and vibration of the speed reducer. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a sectional view of the utility model;

[0028] Figure 2 It is a schematic view of the internal structure of the utility model;

[0029] Figure 3The first planetary gear assembly structure schematic view of the utility model;

[0030] Figure 4 The second planetary gear assembly structure schematic view of the utility model;

[0031] Figure 5 The output end cover structure schematic view of the utility model;

[0032] Figure 6 The inner gear ring structure schematic view of the utility model;

[0033] Figure 7 The upper cover structure schematic view of the utility model.

[0034] 1, shell;1.1, motor installation cavity;1.2, limit support seat;1.3, planetary gear installation cavity;1.4, first shock absorbing rubber block;1.5, center shaft;1.6, semicircle damping pin;1.7, transmission shaft;

[0035] 2, upper cover;2.1, second shock absorbing rubber block;2.2, center shaft mounting hole;2.3. transmission shaft mounting hole;2.4, motor output shaft mounting hole;

[0036] 3, motor;3.1, motor output shaft;

[0037] 4, driving gear;

[0038] 5, over wheel;

[0039] 6, driven gear;

[0040] 7, first planetary gear assembly;7.1, first planet carrier;7.2, first planetary gear;7.3, first center gear;

[0041] 8, inner gear ring;8.1, installation groove;

[0042] 9, second planetary gear assembly;9.1, output end cover;9.2, second center gear;9.3, second planetary gear;

[0043] 10, spline. DETAILED DESCRIPTION

[0044] The technical scheme of the utility model will be described below in conjunction with the drawings in the utility model embodiments, and in the description, it should be understood that if the directions or position relations indicated by terms such as 'up', 'down', 'front', 'back', 'left', 'right' are described, they only correspond to the drawings of the utility model, and are not intended to indicate or imply that the devices or elements must have a particular orientation.

[0045] Please refer to the drawings in the description Figures 1-7The utility model provides a technical scheme:

[0046] Embodiment one, a kind of common gear ring planetary gear drive speed reducer, including shell 1, and the upper cover 2 of buckling in the upper open of shell 1, shell 1 inner chamber one side is equipped with motor installation cavity 1.1, motor installation cavity 1.1 is equipped with motor 3 and the limiting support seat 1.2 for sealing fixed motor 3, motor 3 motor output shaft 3.1 passes out limiting support seat 1.2, and is equipped with driving gear 4 on its axle body, shell 1 inner chamber other side is equipped with planetary gear installation cavity 1.3, planetary gear installation cavity 1.3 is equipped with inner gear ring 8, inner gear ring 8 is sequentially equipped with first planetary gear assembly 7 and second planetary gear assembly 9 by from top to bottom in, and all with inner gear ring 8 is engaged with;

[0047] Wherein, first planetary gear assembly 7 includes first carrier 7.1, and first central gear 7.3 and a plurality of first planetary gears 7.2 are rotatably installed on first carrier 7.1, a plurality of first planetary gears 7.2 are evenly distributed around first central gear 7.3, and are engaged with first central gear 7.3 transmission, the outer edge of a plurality of first planetary gears 7.2 is engaged with inner gear ring 8;

[0048] Second planetary gear assembly 9 includes output end cover 9.1, and second central gear 9.2 and a plurality of second planetary gears 9.3 are rotatably installed on output end cover 9.1, a plurality of second planetary gears 9.3 are evenly distributed around second central gear 9.2, and are engaged with second central gear 9.2 transmission, the outer edge of a plurality of second planetary gears 9.3 is engaged with inner gear ring 8

[0049] The upper portion of planetary gear installation cavity 1.3 is provided with a driven gear 6 that is drivenly engaged with the driving gear 4 and is used to drive the first planetary gear assembly 7 and the second planetary gear assembly 9 to rotate synchronously, specifically, the planetary gear installation cavity 1.3 is provided with a central shaft 1.5 that is coaxially arranged with the first planetary gear assembly 7 and the second planetary gear assembly 9 and sequentially penetrates the first planetary gear assembly 7 and the second planetary gear assembly 9, the central shaft 1.5 sequentially penetrates the first central gear 7.3 and the second central gear 9.2 and is rotatably connected with the output end cover 9.1, and the rotation of the central shaft 1.5 drives the first central gear 7.3 and the second central gear 9.2 to rotate synchronously;

[0050] The upper portion of the planetary gear installation cavity 1.3 is rotatably installed on the upper portion of the central shaft 1.5, the driven gear 6 is driven to rotate by the driving gear 4, and then the central shaft 1.5 is driven to rotate, finally the first planetary gear assembly 7 and the second planetary gear assembly 9 are driven to rotate synchronously, and the lower portion of the planetary gear installation cavity 1.3 is provided with a spline 10 that is drivingly connected with the output end cover 9.1 and penetrates to the outside of the shell 1.

[0051] In the embodiment two, the inner gear ring 8 is installed in the planetary gear installation cavity 1.3. In order to ensure the stability of the inner gear ring 8 and avoid the vibration of the inner gear ring 8 during the rotation of the first planetary gear assembly 7 and the second planetary gear assembly 9, a plurality of installation grooves 8.1 are uniformly distributed on the outer wall of the inner gear ring 8. A semicircular damping pin 1.6 is arranged in the installation groove 8.1 and is in interference contact with the inner wall of the planetary gear installation cavity 1.3. The installation groove 8.1 is filled with concave damping particles and lubricating grease, so as to ensure the stable installation of the inner gear ring 8 and reduce the vibration of the inner gear ring 8.

[0052] In order to further improve the stability of the inner gear ring 8, a plurality of second damping rubber blocks 2.1 are arranged on the lower surface of the upper cover 2 and are in contact with the upper end surface of the inner gear ring 8. When the upper cover 2 is buckled, the second damping rubber blocks 2.1 are in contact with the upper end surface of the inner gear ring 8, so as to limit and damp the inner gear ring 8.

[0053] In the embodiment three, the motor 3 is installed in the housing 1. In order to ensure the stability of the motor 3 and reduce the vibration of the motor 3, a plurality of first damping rubber blocks 1.4 are uniformly distributed on the upper surface of the limiting support seat 1.2. When the upper cover 2 is buckled, the upper cover 2 is in contact with the upper part of the first damping rubber blocks 1.4, so as to limit and damp the motor 3 by pressing and limiting the limiting support seat 1.2.

[0054] In the embodiment four, in order to enable the speed reducer to uniformly distribute the load, improve the carrying capacity, reduce the noise and vibration, the number of the first planetary gears 7.2 in the first planetary gear assembly 7 is different from the number of the second planetary gears 9.3 in the second planetary gear assembly 9. Preferably, the number of the first planetary gears 7.2 in the first planetary gear assembly 7 is three, and the number of the second planetary gears 9.3 in the second planetary gear assembly 9 is four. This design can improve the performance of the speed reducer, provide higher transmission efficiency, prolong the service life, and has higher flexibility, and is suitable for more diversified and high-demand application occasions.

[0055] In the embodiment one, in order to ensure the effective transmission of the driving gear 4 and the driven gear 6 and further improve the safety factor, avoid the direct contact between the driving gear 4 and the driven gear 6, a transmission shaft 1.7 is rotatably installed on the upper part of the limiting support seat 1.2 and is parallel to the central shaft 1.5 and located between the motor output shaft 3.1 and the central shaft 1.5. The transmission shaft 1.7 is provided with an over wheel 5 which is engaged with the driving gear 4 and the driven gear 6.

[0056] In the embodiment one, in order to further improve the stability of motor output shaft 3.1, transmission shaft 1.7 and central shaft 1.5, ensure the effective operation in the speed reducer, the lower surface of upper cover 2 is respectively provided with motor output shaft mounting hole 2.4, central shaft mounting hole 2.2 and transmission shaft mounting hole 2.3 corresponding to the upper end of motor output shaft 3.1, central shaft 1.5 and transmission shaft 1.7.

[0057] The utility model discloses not detailed part is prior art, for the person skilled in the art, apparently the utility model is not limited to the details of the above exemplary embodiments, and can realize the utility model with other specific forms without departing from the spirit or basic characteristics of the utility model, therefore, no matter from which point, should regard the above embodiment as exemplary, and is non-restrictive, the range of the utility model is defined by the appended claims instead of the above description, therefore aims at including all changes falling in the meaning and scope of the equivalent elements of the claims in the utility model, should not regard any figure mark in the claims as the restriction of the content of the claim involved.

Claims

1. A co-gear ring planetary gear reduction unit comprising a housing (1) and an upper cover (2) which is fastened to the upper opening of the housing (1), characterized in that: The inner cavity of the shell (1) is provided with a motor mounting cavity (1.1) on one side, the motor mounting cavity (1.1) is provided with a motor (3) and a limiting support seat (1.2) for sealing and fixing the motor (3), the motor output shaft (3.1) of the motor (3) penetrates through the limiting support seat (1.2) and is provided with a driving gear (4) on the shaft body, the other side of the inner cavity of the shell (1) is provided with a planetary gear mounting cavity (1.3), the planetary gear mounting cavity (1.3) is provided with an inner tooth ring (8), the first planetary gear assembly (7) and the second planetary gear assembly (9) are sequentially arranged in the inner tooth ring (8) from top to bottom and are coaxially arranged with the inner tooth ring (8) and are in meshing transmission with the inner tooth ring (8), the upper part of the planetary gear mounting cavity (1.3) is provided with a driven gear (6) which is in driving cooperation with the driving gear (4) and is used for driving the first planetary gear assembly (7) and the second planetary gear assembly (9) to rotate synchronously, and the lower part of the planetary gear mounting cavity (1.3) is provided with a spline (10) which is in driving connection with the second planetary gear assembly (9) and penetrates to the outside of the shell (1).

2. A planetary gear reduction unit with a common ring gear according to claim 1, characterized in that: A plurality of installation grooves (8.1) are uniformly distributed on the outer wall of the inner tooth ring (8), and a semicircular damping pin (1.6) in interference abutment with the inner wall of the planetary gear mounting cavity (1.3) is arranged in the installation groove (8.1).

3. A planetary gear reduction unit with a common ring gear according to claim 1, characterized in that: The planetary gear mounting cavity (1.3) is provided with a central shaft (1.5) which is coaxially arranged with the first planetary gear assembly (7) and the second planetary gear assembly (9) and sequentially penetrates the first planetary gear assembly (7) and the second planetary gear assembly (9), the driven gear (6) is mounted on the upper end of the shaft body of the central shaft (1.5) and drives the central shaft (1.5) to drive the first planetary gear assembly (7) and the second planetary gear assembly (9) to rotate synchronously.

4. A planetary gear reduction unit with a common ring gear according to claim 3, characterized in that: The first planetary gear assembly (7) comprises a first carrier (7.1), a first central gear (7.3) and a plurality of first planetary gears (7.2) which are rotatably mounted on the first carrier (7.1), the first central gear (7.3) is coaxially arranged with the central shaft (1.5) and is driven to rotate by the central shaft (1.5), the plurality of first planetary gears (7.2) are uniformly distributed around the first central gear (7.3) and are in meshing transmission with the first central gear (7.3), and the outer edges of the plurality of first planetary gears (7.2) are in meshing transmission with the inner tooth ring (8). The second planetary gear assembly (9) comprises an output end cover (9.1), a second central gear (9.2) and a plurality of second planetary gears (9.3) which are rotatably mounted on the output end cover (9.1), the second central gear (9.2) is coaxially arranged with the central shaft (1.5) and is driven to rotate by the central shaft (1.5), the plurality of second planetary gears (9.3) are uniformly distributed around the second central gear (9.2) and are in meshing transmission with the second central gear (9.2), and the outer edges of the plurality of second planetary gears (9.3) are in meshing transmission with the inner tooth ring (8).

5. A planetary gear reduction unit with a common ring gear according to claim 4, characterized in that: The number of the first planetary gears (7.2) in the first planetary gear assembly (7) is different from the number of the second planetary gears (9.3) in the second planetary gear assembly (9).

6. A planetary gear reduction unit with a common ring gear according to claim 5, characterized in that: ​ 7. A planetary gear reduction unit with a common ring gear according to claim 1, characterized in that: A transmission shaft (1.7) is rotatably installed on the upper part of the limiting support seat (1.2) between the motor output shaft (3.1) and the central shaft (1.5) and is arranged in parallel with the central shaft (1.5). The shaft body of the transmission shaft (1.7) is provided with a gear wheel (5) engaged with the driving gear (4) and the driven gear (6).

8. A planetary gear reduction unit with a common ring gear according to claim 1, characterized in that: The upper surface of the limiting support seat (1.2) is uniformly provided with a plurality of first damping rubber blocks (1.4) abutting against the upper cover (2) and used for damping protection of the limiting support seat (1.2) and the motor (3).

9. A planetary gear reduction unit with a common ring gear according to claim 1, characterized in that: The lower surface of the upper cover (2) is provided with a plurality of second damping rubber blocks (2.1) abutting against the upper end surface of the inner ring gear (8) and used for damping protection of the inner ring gear (8).

10. A planetary gear reduction unit with a common ring gear according to claim 9, characterized in that: The lower surface of the upper cover (2) is respectively provided with a motor output shaft mounting hole (2.4), a central shaft mounting hole (2.2) and a transmission shaft mounting hole (2.3) corresponding to and adapted to the upper end of the motor output shaft (3.1), the central shaft (1.5) and the transmission shaft (1.7).

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