Planetary reducer

Abstract

A planetary reducer comprises a shell, a motor and a reducing mechanism, wherein the motor and the reducing mechanism are arranged in the shell and are in transmission connection with each other; an inner gear ring is fixed to the front end of the shell, the output end of the motor is connected with a sun gear, and the sun gear is located in the center of the inner gear ring. The speed reducing mechanism comprises a front planet carrier, a rear seat plate, a planet shaft and a planet gear; the front planet carrier and the rear seat plate are arranged on the front side and the rear side of the inner gear ring respectively, and the planet shaft penetrates through the planet gear to be installed between the front planet carrier and the rear seat plate. The planetary gears are respectively meshed with the sun gear and the inner gear ring; an output part is further mounted at the front end of the front planet carrier; a supporting column is further fixed between the front planet carrier and the rear seat plate. In addition, due to the fact that part of force is dispersed to the supporting column, when the planetary gear starts to rotate, the force borne by the planetary gear is relatively reduced. Therefore, abrasion of the planetary gear is reduced, and the service life of the planetary gear is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to a speed reducer technical field especially a kind of planetary reducer. BACKGROUND

[0002] As an important component in transmission system, planetary reducer usually contains a one-stage speed reduction mechanism, especially the first stage adopts the way of planetary mechanism reduction. This design ingeniously integrates multiple key parts: planetary gear, sun gear, inner ring gear and planet carrier. As the core support component of this precision structure, planet carrier not only stably bears the rotational movement of planetary gear, but also accurately defines the center distance of the entire planetary mechanism, thereby ensuring the accuracy and stability of transmission.

[0003] However, despite the significant advantages of planetary reducer in transmission efficiency and torque amplification, most products on the current market still face some challenges. First, its structure is often not compact enough, resulting in a larger overall volume, which not only increases the space occupation of the equipment, but also brings inconvenience to installation and maintenance. Second, some planetary reducers lack sufficient flexibility and convenience during installation, making it difficult to adapt to diverse installation environments and needs. In addition, due to limitations in structural design and material selection, some machines may experience unstable operation during work, which not only exacerbates gear wear and shortens service life, but also may cause overheating problems due to the inability to effectively dissipate heat generated by friction. SUMMARY

[0004] In view of the above defects, the purpose of the utility model is to provide a planetary reducer to improve the stability of the speed reducer during operation, reduce the wear of planetary gears and improve the service life of planetary gears.

[0005] To achieve this purpose, the utility model adopts the following technical solution: a planetary reducer, comprising a housing, a motor and a speed reduction mechanism arranged in the housing and connected to each other in transmission;

[0006] The front end of the housing is fixed with an inner ring gear, the output end of the motor is connected with a sun gear, and the sun gear is located at the center of the inner ring gear;

[0007] The speed reduction mechanism includes a front planet carrier, a rear seat plate, a planet shaft and a planetary gear;

[0008] The front planet carrier and the rear seat plate are respectively arranged on the front and rear sides of the inner ring gear, and the planet shaft is installed between the front planet carrier and the rear seat plate through the planetary gear;

[0009] The planetary gear meshes with the sun gear and the inner ring gear respectively;

[0010] The front end of the front planet carrier is also provided with an output part;

[0011] The support column is fixed between the front planet carrier and the rear seat plate.

[0012] Preferably, four planet shafts and support columns are arranged alternately.

[0013] Preferably, the output part comprises a front end fixed flange, an output shaft and a deep groove ball bearing.

[0014] The first mounting hole of the front end fixed flange,

[0015] The outer circumferential surface of the inner ring gear outwardly protrudes a mounting part, and the mounting part is provided with a second mounting hole.

[0016] The locking member is fixed to the front end surface of the shell in sequence through the first mounting hole and the second mounting hole, and the edge of the outer circumferential surface of the inner ring gear is respectively abutted with the inner wall surface of the front end of the shell and the inner wall surface of the rear end of the front end fixed flange.

[0017] The deep groove ball bearing is arranged in the front end fixed flange.

[0018] The output shaft is detachably connected with the front end surface of the front planet carrier, the output shaft passes through the deep groove ball bearing and is exposed to the front end fixed flange.

[0019] Preferably, at least two deep groove ball bearings are arranged in the front end fixed flange in sequence.

[0020] Preferably, a skeleton type oil seal is arranged between the frontmost deep groove ball bearing and the end of the front end fixed flange.

[0021] Preferably, the locking member is a hexagonal socket head cap screw.

[0022] Preferably, a spring washer is further arranged between the locking member and the front end fixed flange.

[0023] Preferably, the sun gear has 43 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0024] The planet gear has 17 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0025] The inner ring gear has 77 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0026] The technical scheme has the advantages or beneficial effects that the support column strengthens the connection strength between the front planet carrier and the rear seat plate, when the planet gear starts to rotate, the support column can share the force received by the planet shaft, so that the front planet carrier and the rear seat plate can rotate together, and the stability of the operation of the speed reduction mechanism is improved. In addition, since part of the force is dispersed to the support column, the force received by the planet gear is also relatively reduced when starting to rotate. Thus, the wear of the planet gear is reduced, and the service life of the planet gear is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Fig. 1 is a structure schematic view of an embodiment of the utility model.

[0028] Fig. 2 is a sectional view of an embodiment of the utility model.

[0029] Wherein: shell 1, motor 2, speed reduction mechanism 3, front planet carrier 3a, rear seat plate 3b, planet shaft 3c, planet gear 3d, support column 3e, inner gear ring 4, mounting portion 4a, sun gear 5, output portion 6, front end fixed flange 6a, output shaft 6b, deep groove ball bearing 6c, skeleton type oil seal 7, spring washer 8, locking piece 9. DETAILED DESCRIPTION

[0030] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as the limitation of the utility model.

[0031] In the description of the utility model, it is understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" are based on the orientation or position relationship shown in the drawings, only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, structure and operation, therefore, cannot be understood as the limitation of the utility model.

[0032] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0033] In the description of the utility model, it is explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0034] As shown in Figs. 1-2 A planetary reducer, comprising a shell (1), a motor (2) and a speed reducer (3) are arranged in the shell (1) and are in transmission connection with each other.

[0035] The front end of the shell (1) is fixed with an inner gear ring (4), the output end of the motor (2) is connected with a sun gear (5), and the sun gear (5) is located at the center of the inner gear ring (4).

[0036] The speed reducer (3) comprises a front planet carrier (3a), a rear seat plate (3b), a planet shaft (3c) and a planet gear (3d).

[0037] The front planet carrier (3a) and the rear seat plate (3b) are arranged on the front and rear sides of the inner gear ring (4) respectively, the planet shaft (3c) passes through the planet gear (3d) and is installed between the front planet carrier (3a) and the rear seat plate (3b).

[0038] The planet gear (3d) is respectively engaged with the sun gear (5) and the inner gear ring (4).

[0039] The front end of the front planet carrier (3a) is also provided with an output part (6).

[0040] The front planet carrier (3a) and the rear seat plate (3b) are also fixed with a support column (3e).

[0041] In the utility model, when need to carry out deceleration operation, motor (2) starts, drive sun gear (5) rotation, at this moment because planetary gear (3d) is engaged and sun gear (5) simultaneously with inner toothed ring (4), planetary gear (3d) both rotates and revolves around sun gear (5), and rotates front planet carrier (3a) and rear seat plate (3b) together through the planetary axle (3c) in it while revolving.And front planet carrier (3a) is connected with output part (6), and the output torque of deceleration mechanism (3) is better shared and the impact is better protected planetary gear (3d) and planetary axle (3c) through the transmission deceleration of multiple gears, and the stability and reliability of structure are guaranteed.

[0042] Preferably, the planetary axle (3c) and the support column (3e) are provided with four, and the planetary axle (3c) and the support column (3e) are arranged alternately.

[0043] Four planetary axles (3c) and the support column (3e) are respectively arranged equidistantly between the front planet carrier (3a) and the rear seat plate (3b), and four planetary gears can better share the output torque and impact of the deceleration mechanism (3), better protect the planetary gear (3d) and the planetary axle (3c), and ensure the stability and reliability of the structure.

[0044] Preferably, the output part (6) comprises a front end fixed flange (6a), an output shaft (6b) and a deep groove ball bearing (6c).

[0045] The first mounting hole of the front end fixed flange (6a),

[0046] The outer circumferential surface of the inner toothed ring (4) outwardly protrudes an installation portion (4a), and the installation portion (4a) is provided with a second mounting hole.

[0047] The locking member (9) is sequentially fixed to the front end face of the shell (1) through the first mounting hole and the second mounting hole, and the edge of the outer circumferential surface of the inner toothed ring (4) is respectively abutted with the inner wall face of the front end of the shell (1) and the inner wall face of the rear end of the front end fixed flange (6a);

[0048] The deep groove ball bearing (6c) is arranged in the front end fixed flange (6a);

[0049] The output shaft (6b) is detachably connected with the front end face of the front planetary carrier (3a), the output shaft (6b) passes through the deep groove ball bearing (6c) and is exposed to the front end fixed flange (6a).

[0050] Since the conventional output part (6) is not provided with a fixed material at the front end, the output shaft (6b) is prone to shaking under the influence of rotational inertia, in order to further improve the stability of the output, the deep groove ball bearing (6c) is arranged in the output part (6), the output shaft (6b) passes through the deep groove ball bearing (6c), so that the output shaft (6b) is limited and fixed, and the shaking degree is reduced. Improve the stability of the output.

[0051] In addition, in order to improve the installation simplicity, first mounting holes and second mounting holes are respectively formed in the front end fixed flange (6a) and the mounting portion (4a) of the inner gear ring (4) in the utility model, when installing, the shell (1) is erected, since the edge of the outer circumference surface of the inner gear ring (4) is abutted against the inner wall surface of the front end of the shell (1) when the inner gear ring (4) is installed, quick positioning can be realized, then the mounting portion (4a) is rotated, so that it is aligned with the hole of the front end of the shell (1). Then the front end fixed flange (6a) is installed on the mounting portion (4a), and since the edge of the outer circumference surface of the inner gear ring (4) is abutted against the inner wall surface of the rear end of the front end fixed flange (6a) when the inner gear ring (4) is installed, the front end fixed flange (6a) can be quickly positioned, then the front end fixed flange (6a) is continuously rotated, so that the first mounting hole corresponds to the second mounting hole, finally the locking piece (9) is twisted to complete the installation. The positioning time required when the speed reducer is installed is removed, the installation time is finally shortened, and the installation efficiency is improved.

[0052] Preferably, the deep groove ball bearing (6c) is provided with at least two, and a plurality of deep groove ball bearings (6c) are arranged in the front end fixed flange (6a) in sequence.

[0053] The output shaft (6b) is limited by a plurality of deep groove ball bearings, and the plurality of deep groove ball bearings can uniformly disperse the shaking of the output shaft (6b) when output power, so that the stability of the speed reducer as a whole when working is improved, and the possibility of collision between the output shaft (6b) and the front end fixed flange (6a) is reduced, so that the cause of noise is eliminated.

[0054] Preferably, a skeleton type oil seal (7) is arranged between the frontmost deep groove ball bearing and the end of the front end fixed flange (6a).

[0055] The skeleton oil seal (7) can prevent external water and oil from entering the inside of the speed reducer, thereby affecting the structural stability of the inside of the speed reducer.

[0056] Preferably, the locking member (9) is a hexagonal socket head cap screw. The hexagonal socket head cap screw can easily connect and fix the front end fixing flange (6a), the inner gear ring (4) and the shell (1), thereby reducing the installation process and difficulty.

[0057] Preferably, the locking member (9) and the front end fixing flange are further provided with a spring washer (8).

[0058] Since the speed reducer will vibrate when working, the connection strength between the front end fixing flange (6a) and the shell (1) is affected, and the output part (6) may fall off from the shell (1). In order to increase the connection strength, the locking member (9) and the front end fixing flange are further provided with a spring washer (8). After the locking member (9) is tightened, the spring washer (8) is flattened, thereby generating a continuous elastic force. The elastic force keeps the locking member (9) and the threaded connection pair of the first mounting hole and the second mounting hole to generate a friction force, thereby preventing the locking member (9) from loosening.

[0059] Preferably, the sun gear (5) has 43 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0060] The planet gear (3d) has 17 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0061] The inner gear ring (4) has 77 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

[0062] The sun gear (5) has 43 teeth, and the planet gear (3d) has 17 teeth. Such a tooth ratio can make the transmission ratio reach 2.8. In addition, the larger the module is, the larger the size of the gear is, and the larger the corresponding bearing capacity is. In the embodiment, the module of 2.5 mm ensures that the gear has sufficient strength to bear the load in the transmission process, thereby improving the service life of each gear. The pressure angle of 20° can provide better meshing effect and reduce friction loss, thereby improving transmission efficiency.

[0063] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A planetary reduction machine characterized by, The shell, the motor and the speed reduction mechanism are arranged in the shell and are in transmission connection with each other; The front end of the shell is fixed with an inner ring gear, and the output end of the motor is connected with a sun gear, which is located in the center of the inner ring gear; The speed reduction mechanism comprises a front planet carrier, a rear seat plate, a planet shaft and a planet gear; The front planet carrier and the rear seat plate are arranged on the front side and the rear side of the inner ring gear respectively, and the planet shaft is installed between the front planet carrier and the rear seat plate through the planet gear; The planet gear is in meshing connection with the sun gear and the inner ring gear respectively; The front end of the front planet carrier is further provided with an output part; The front planet carrier and the rear seat plate are further fixed with a support column.

2. A planetary speed reducer according to claim 1, characterized in that, The planet shaft and the support column are arranged in a staggered manner.

3. A planetary speed reducer according to claim 1, wherein The output part comprises a front end fixed flange, an output shaft and a deep groove ball bearing; The first mounting hole of the front end fixed flange, The outer circumferential surface of the inner ring gear is outwardly protruded with a mounting part, and the mounting part is provided with a second mounting hole; The locking member is fixed to the front end surface of the shell through the first mounting hole and the second mounting hole in sequence, and the edge of the outer circumferential surface of the inner ring gear is in abutment with the inner wall surface of the front end of the shell and the inner wall surface of the rear end of the front end fixed flange respectively; The deep groove ball bearing is arranged in the front end fixed flange; The output shaft is detachably connected with the front end surface of the front planet carrier, and the output shaft passes through the deep groove ball bearing and is exposed to the front end fixed flange.

4. A planetary speed reducer according to claim 3, wherein The deep groove ball bearing is arranged in the front end fixed flange.

5. A planetary speed reducer according to claim 4, wherein The deep groove ball bearing is arranged in the front end fixed flange.

6. A planetary speed reducer according to claim 3, wherein The locking member is a hexagonal cylindrical head screw.

7. A planetary speed reducer according to claim 6, characterized in that The locking member and the front end fixed flange are further provided with a spring washer.

8. A planetary speed reducer according to claim 1, wherein The sun gear has 43 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm; The planet gear has 17 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm; The inner ring gear has 77 teeth, a module of 2.5 mm, a pressure angle of 20° and a center distance of 74.5 mm.

Images