Modular speed ratio adjustable planetary reducer

Abstract

The utility model provides a kind of modularization speed ratio adjustable planetary reducer, it is related to the field of speed reducer.The planetary reducer includes: speed reducer shell, is equipped with opening, opening place detachably installed with sealing cover plate;Transmission structure, it is set in the inside of speed reducer shell, its input end extends to the outside of speed reducer shell, for connecting power source;And planetary transmission module, including mutually matched planet carrier, sun gear, internal gear ring and multiple planetary gears, input gear is rotatably sleeved on the output shaft of planet carrier, input gear is used to be transmission connection with the input end of transmission structure, and input gear and sun gear coaxial transmission connection;Wherein, the output shaft of planet carrier is configured with worm gear transmission part, worm gear transmission part is transmission connection with a adjusting worm, adjusting worm is used to connect external control end;Speed reducer shell is equipped with the access for installing adjusting worm.This application completely solves the defects of existing integrated design parameter fixed, replacement mode waste and time-consuming.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and more specifically, to a modular planetary speed reducer with adjustable speed ratio. Background Technology

[0002] Gear reducers are crucial intermediate devices in mechanical transmission systems. Their core function is to convert the high-speed, low-torque output of a power source (such as a motor) into the low-speed, high-torque required by the load through transmission structures such as gears and planetary gear trains. Simultaneously, they achieve precise control and matching of power transmission, and are widely used in industrial automation, precision equipment, and construction machinery. The German FramoMorat series planetary gear reducers, as representative products in the industry, adopt a highly integrated overall design concept. Their internal planetary transmission section is the core hub of the entire device—this part consists of key components such as the sun gear, planet gears, planet carrier, and internal gear ring, directly determining the reducer's core performance indicators, including the transmission ratio, torque transmission efficiency, and operational stability. It is a critical system ensuring the overall function of the equipment.

[0003] To achieve optimal performance, the planetary transmission section of the Framo Morat series planetary gearbox undergoes precise mechanical calculations and structural optimization matching with surrounding components such as the housing, bearings, and output shaft. This deeply integrated design minimizes clearances between components, improves transmission accuracy, enhances the equipment's shock resistance and operational reliability, and effectively extends the overall service life, meeting the stringent requirements of efficient and stable transmission in industrial settings. However, this design also has inherent limitations: the transmission ratio and torque parameters of the planetary gearbox are fixed during the design and manufacturing stages and cannot be easily adjusted to fully adapt to the initially set working conditions.

[0004] When the operating environment of equipment changes, such as production process upgrades, load demand adjustments, or application field expansion, and the original transmission ratio and torque parameters no longer meet the requirements, there are currently two main solutions in the industry. One is to replace the entire gearbox with one that meets the parameters of the new operating conditions. While this method is straightforward, it leads to the idle waste of the original equipment, and the purchase cost of the new equipment is high, which may also delay production. The other method is to disassemble and open the gearbox housing, replace the core transmission components such as the worm gear pair and gear pair, and then redesign, assemble, and debug. While this method avoids the waste of replacing the entire machine, the process is complex, the technical threshold is high, and the performance needs to be re-verified after reassembly, which is time-consuming and labor-intensive, affecting production efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a modular planetary reducer with adjustable speed ratio, which aims to solve the technical problems mentioned in the background art.

[0006] The embodiments of this utility model are implemented as follows: This application provides a modular adjustable planetary reducer, comprising: a reducer housing with an opening, the opening of which is detachably fitted with a sealing cover; a transmission structure disposed inside the reducer housing, the input end of which extends to the outside of the reducer housing for connecting to a power source; and a planetary transmission module including a planet carrier, a sun gear, an internal gear ring, and multiple planet gears that cooperate with each other. An input gear is rotatably mounted on the output shaft of the planet carrier, the input gear being used for transmission connection with the input end of the transmission structure, and the input gear being coaxially transmission connection with the sun gear; wherein the output shaft of the planet carrier is configured with a worm gear transmission part, the worm gear transmission part being transmission connection to an adjusting worm, the adjusting worm being used for connecting to an external control end; and the reducer housing having an inlet for mounting the adjusting worm.

[0007] Furthermore, based on the aforementioned scheme, the transmission structure includes a motor shaft, a worm gear transmission unit, and a gear set transmission unit connected in sequence. One end of the motor shaft extends to the outside of the reducer housing for connecting to an external power source, and the other end is connected to the worm gear transmission unit. The gear set transmission unit is connected to the input gear.

[0008] Furthermore, based on the aforementioned scheme, the motor shaft and the worm gear transmission unit are connected by a helical gear set.

[0009] Furthermore, based on the aforementioned scheme, the planetary transmission module corresponds to the aforementioned opening configuration.

[0010] Furthermore, based on the aforementioned scheme, the sealing cover plate is provided with mounting holes through which the output shaft of the planetary carrier passes.

[0011] Furthermore, based on the aforementioned scheme, the output shaft of the planetary carrier is equipped with a deep groove ball bearing and a skeleton oil seal.

[0012] Furthermore, based on the aforementioned scheme, the reducer housing is provided with a control box, the adjusting worm extends into the control box, and the inlet is connected to the control box; The control box has an adjustment port on its side wall, and a protective plate is detachably installed at the adjustment port.

[0013] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects: The modular adjustable planetary reducer of this application follows the core modular design concept. The planetary gear set (including the mating planetary carrier, sun gear, internal gear ring, and multiple planetary gears) is pre-assembled as an independent planetary transmission module. The module is precisely connected to the input end of the transmission structure inside the reducer housing through the input gear, and the input gear and sun gear are coaxially driven. At the same time, the worm gear transmission part of the planetary carrier output shaft cooperates with the adjusting worm connected to the reducer housing to adapt to external control. The opening of the reducer housing and the removable sealing cover provide channels for module disassembly and assembly. When the working environment changes and the transmission ratio and torque need to be adjusted, there is no need to replace individual gears or disassemble the whole machine. Only the sealing cover needs to be removed, and the pre-assembled planetary transmission module that meets the new working condition parameters can replace the original module. Through the rapid adaptation and connection between the module and the transmission structure, the speed ratio and torque of the reducer can be adjusted efficiently, which completely solves the defects of fixed parameters, wasteful and time-consuming replacement methods in the existing integrated design. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A modular planetary reducer with adjustable speed ratio is provided as an embodiment of this utility model. Figure 1 ; Figure 2 A modular planetary reducer with adjustable speed ratio is provided as an embodiment of this utility model. Figure 2 ; Figure 3 A modular planetary reducer with adjustable speed ratio is provided as an embodiment of this utility model. Figure 3 ; Figure 4 Axonometric view of the internal structure of a modular planetary reducer with adjustable speed ratio, as described in this embodiment of the utility model. Figure 1 ; Figure 5 Axonometric view of the internal structure of a modular planetary reducer with adjustable speed ratio, as described in this embodiment of the utility model. Figure 2 ; Figure 6 This is a cross-sectional view of the planetary transmission module according to an embodiment of the present invention; Figure 7 This is a partial schematic diagram of the planetary transmission module according to an embodiment of the present invention. Figure 1 ; Figure 8 This is a partial schematic diagram of the planetary transmission module according to an embodiment of the present invention. Figure 2 .

[0016] Icons: 1-Gearbox housing, 2-Sealing cover, 3-Output shaft, 4-Internal gear ring, 5-Helical gear set, 6-Control box, 7-Input gear, 8-Worm gear transmission unit, 9-Gear set transmission unit, 10-Adjusting worm, 11-Motor shaft, 12-Worm gear transmission unit, 13-Sun gear, 14-Planet gears, 15-Deep groove ball bearing, 16-Planet carrier, 17-Skeleton oil seal. Detailed Implementation

[0017] The embodiments of this application will now be described in detail with reference to the accompanying drawings. Example

[0018] Please refer to Figures 1-8 This application provides a modular adjustable planetary reducer, comprising: a reducer housing 1 with an opening, the opening of which is detachably fitted with a sealing cover 2; a transmission structure disposed inside the reducer housing 1, the input end of which extends to the outside of the reducer housing 1 for connecting to a power source; and a planetary transmission module comprising a planet carrier 16, a sun gear 13, an internal gear ring 4, and a plurality of planet gears 14 that cooperate with each other. An input gear 7 is rotatably mounted on the output shaft 3 of the planet carrier 16. The input gear 7 is used for transmission connection with the input end of the transmission structure, and the input gear 7 is coaxially transmission connection with the sun gear 13. The output shaft 3 of the planet carrier 16 is provided with a worm gear transmission part 12, which is transmission connection to an adjusting worm 10, the adjusting worm 10 being used for connecting to an external control terminal. The reducer housing 1 is provided with an inlet for mounting the adjusting worm 10.

[0019] The modular adjustable planetary reducer of this application follows the core modular design concept. The planetary gear set (including the mutually cooperating planetary carrier 16, sun gear 13, internal gear ring 4, and multiple planetary gears 14) is pre-assembled as an independent planetary transmission module. The module is precisely connected to the input end of the transmission structure inside the reducer housing 1 through the input gear 7, and the input gear 7 and sun gear 13 are coaxially driven. At the same time, the worm gear transmission part 12 of the output shaft 3 of the planetary carrier 16 cooperates with the adjusting worm 10 connected to the reducer housing 1 to adapt to external control. The opening of the reducer housing 1 and the removable sealing cover 2 provide channels for module disassembly and assembly. When the working scenario changes and the transmission ratio and torque need to be adjusted, there is no need to replace individual gears or disassemble the whole machine. Only the sealing cover 2 needs to be removed, and the pre-assembled planetary transmission module that meets the new working condition parameters can replace the original module as a whole. Through the rapid adaptation and connection between the module and the transmission structure, the speed ratio and torque of the reducer can be adjusted efficiently, which completely solves the defects of fixed parameters, wasteful and time-consuming replacement methods in the existing integrated design.

[0020] In a preferred embodiment, the transmission structure includes a motor shaft 11, a worm gear transmission unit 8, and a gear transmission unit 9 connected in sequence. One end of the motor shaft 11 extends to the outside of the reducer housing 1 for connecting to an external power source, and the other end is connected to the worm gear transmission unit 8. The gear transmission unit 9 is connected to the input gear 7 in a transmission connection.

[0021] In the above embodiment, efficient adaptation is achieved through the combination of multi-stage precision transmission and modular design: after the motor shaft 11 is connected to an external power source, the power is sequentially transmitted to the worm gear transmission unit 8 and the gear set transmission unit 9. Then, the gear set transmission unit 9 precisely meshes with the input gear 7 of the planetary transmission module, driving the sun gear 13, planet gears 14, internal gear ring 4, and planet carrier 16 in the planetary module to work together to complete the power output. At the same time, the external control end can use the adjusting worm gear 10 installed at the inlet of the reducer housing 1 to cooperate with the worm gear transmission unit 12 of the output shaft 3 of the planet carrier 16 to achieve fine control of the transmission parameters. Its core advantage is that it not only continues the design of the planetary gear set being pre-installed as a module, but also allows for quick adjustment of the speed ratio and torque by replacing the entire module, avoiding the cumbersome replacement of individual gears and the waste of replacing the whole machine. Furthermore, it utilizes the "worm gear transmission unit 8 + gear set transmission unit 9" to achieve the desired power output. The multi-stage transmission structure improves the stability and precision of power transmission, and the external design of the adjusting worm gear 10 enhances control flexibility, perfectly balancing transmission efficiency, ease of adjustment and reliability, and completely solving the inherent defects of traditional integrated reducers.

[0022] It is worth noting that the replacement planetary transmission modules for different output torque and speed requirements have completely consistent specifications at the input and output ends, enabling them to be quickly and accurately adapted to the upper and lower level transmission structures without the need for additional adjustments to interface dimensions or matching parameters. This further enhances the convenience of module replacement and the adaptability of the entire machine.

[0023] In a preferred embodiment, the motor shaft 11 and the worm gear transmission unit 8 are connected by a helical gear set 5.

[0024] In the above embodiments, the helical tooth structure of the helical gear set 5 makes the tooth surface contact a progressive line contact, which has a larger contact area and more uniform force compared with spur gears. This can significantly enhance the load-bearing capacity and impact resistance of the transmission system, reduce gear meshing wear to extend the service life of components, and effectively reduce impact and noise during transmission, thereby improving the smoothness and accuracy of power transmission.

[0025] In a preferred embodiment, the planetary transmission module is configured corresponding to the opening described above.

[0026] In the above embodiment, the planetary transmission module precisely corresponds to the opening of the reducer housing 1. During replacement, only the sealing cover 2 at the opening needs to be removed, allowing for direct removal and installation of the module as a whole, without disassembling the entire reducer or touching the upper or lower transmission structures. This corresponding arrangement not only makes the module positioning more precise, enabling quick and accurate engagement with components such as the input gear 7 and adjusting worm gear 10, avoiding repeated adjustments, but also significantly shortens the module replacement operation time, reducing equipment downtime losses. Simultaneously, it reduces the risk of impact to transmission components during disassembly and assembly, further improving the convenience, efficiency, and reliability of modular speed ratio adjustment.

[0027] In a preferred embodiment, the sealing cover 2 has mounting holes through which the output shaft 3 of the planetary carrier 16 passes. This ensures both the sealing and protective performance of the reducer housing 1 and the smooth transmission of the output shaft 3 of the planetary carrier 16.

[0028] As a preferred embodiment, the output shaft 3 of the planetary carrier 16 is provided with a deep groove ball bearing 15 and a skeleton oil seal 17.

[0029] In the above embodiments, the deep groove ball bearing 15 provides precise support for the output shaft 3 of the planetary carrier 16, effectively reducing rotational friction resistance, reducing transmission loss, and improving the smoothness of the output shaft 3's operation. It can also withstand certain radial and axial loads, enhancing the structure's impact resistance. The skeleton oil seal 17 forms a reliable sealing protection, preventing internal grease leakage to maintain lubrication, and blocking external dust, moisture, and other impurities from entering, avoiding wear and corrosion of key components such as bearings and gears, significantly extending the service life of the planetary transmission module. It is also suitable for scenarios involving frequent modular disassembly and assembly, ensuring stable sealing and transmission performance after each replacement.

[0030] In a preferred embodiment, the reducer housing 1 is provided with a control box 6, the adjusting worm 10 extends into the control box 6, and the inlet is connected to the control box 6. The control box 6 has an adjustment port on its side wall, and a protective plate is detachably installed at the adjustment port.

[0031] In the above embodiments, the independent control box 6 provides a dedicated installation space for the adjusting worm gear 10, ensuring precise meshing between the adjusting worm gear 10 and the external control end, and improving the stability of transmission regulation. The removable protective plate at the adjustment port can not only prevent external dust, moisture and other impurities from entering the control box 6, protecting the adjusting worm gear 10 and the meshing parts from contamination and wear, but also allows for maintenance, adjustment or replacement of the adjusting worm gear 10 without disassembling the entire reducer, only requiring the removal of the protective plate, which greatly reduces maintenance difficulty and downtime.

[0032] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0033] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A modular planetary reducer with adjustable speed ratio, characterized in that, include: The reducer housing (1) has an opening, and a sealing cover (2) is detachably installed at the opening; A transmission structure is provided inside the reducer housing (1), with its input end extending to the outside of the reducer housing (1) for connecting to a power source; as well as The planetary transmission module includes a planet carrier (16), a sun gear (13), an internal gear ring (4), and multiple planet gears (14) that cooperate with each other. An input gear (7) is rotatably mounted on the output shaft (3) of the planet carrier (16). The input gear (7) is used to drive the transmission to the input end of the transmission structure, and the input gear (7) is coaxially driven with the sun gear (13). The output shaft (3) of the planetary carrier (16) is equipped with a worm gear drive (12), which is connected to an adjusting worm (10). The adjusting worm (10) is used to connect to an external control terminal. The reducer housing (1) is provided with an inlet for installing the adjusting worm (10).

2. The modular adjustable planetary reducer according to claim 1, characterized in that, The transmission structure includes a motor shaft (11), a worm gear transmission unit (8), and a gear transmission unit (9) connected in sequence. One end of the motor shaft (11) extends to the outside of the reducer housing (1) for connecting to an external power source, and the other end is connected to the worm gear transmission unit (8). The gear transmission unit (9) is connected to the input gear (7).

3. The modular adjustable planetary reducer according to claim 2, characterized in that, The motor shaft (11) and the worm gear transmission unit (8) are connected by a helical gear set (5).

4. The modular adjustable planetary reducer according to claim 1, characterized in that, The planetary transmission module is configured corresponding to the opening.

5. A modular planetary reducer with adjustable speed ratio according to claim 1, characterized in that, The sealing cover plate (2) has a mounting hole through which the output shaft (3) of the planetary carrier (16) passes.

6. A modular planetary reducer with adjustable speed ratio according to claim 1, characterized in that, The output shaft (3) of the planetary carrier (16) is provided with a deep groove ball bearing (15) and a skeleton oil seal (17).

7. A modular planetary reducer with adjustable speed ratio according to claim 1, characterized in that, The reducer housing (1) is provided with a control box (6), the adjusting worm (10) extends into the control box (6), and the inlet is connected to the control box (6); The control box (6) has an adjustment port on its side wall, and a protective plate is detachably installed at the adjustment port.

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