Modular coaxial toothset reduction mechanism

Abstract

The present application provides a modular coaxial gear set reduction mechanism, which is composed of a casing, a transmission shaft arranged at the center of the casing, an inner ring track arranged at the inner edge of the casing, and a coaxial gear set arranged between the transmission shaft and the inner ring track. The coaxial gear set includes a sun gear, a planetary gear set, and an output member. The planetary gear set is respectively pivotally arranged with a first carrier and a second carrier at both ends of the sun gear. A plurality of planetary gears are pivotally arranged between the first and second carriers at the periphery of the sun gear. Each planetary gear can be engaged with the output member. The coaxial gear set can be selectively assembled by using the modular structure, which is easy to assemble and repair, and can reduce the accumulation of errors, improve the concentricity of the assembled reduction mechanism, make the overall assembly more stable, improve the engagement, and prolong the service life.

Description

Technical Field

[0001] This invention relates to the technical field of planetary reduction mechanisms, specifically to a modular coaxial gear reduction mechanism, which facilitates assembly and maintenance, reduces accumulated errors, improves the concentricity of operation, enhances transmission stability and reliability, reduces component damage, and extends the service life of the reduction mechanism. Background Technology

[0002] Motors typically operate at high speeds. In certain applications, direct motor drive can lead to excessive speed and insufficient torque, failing to achieve the intended work and impacting operational convenience. Therefore, in these applications, a speed reducer is usually installed on the motor's output shaft to reduce speed while providing greater torque. There are various types of speed reducers available. Besides the traditional method of using a combination of large and small gears, the most common type currently is the planetary gear reducer, which overcomes the problems of complex structures, noise, and vibration associated with traditional reducers.

[0003] However, existing speed reducers using planetary gears are constructed by sequentially mounting a sun gear, gear carrier, planetary gears, and output components onto the input shaft. Figure 1 As shown, the planetary gear reduction mechanism consists of a planetary gear carrier 85, a sun gear 80, a plurality of planetary gears 86, an internal gear ring 90, and a housing 95. The internal gear ring 90 is coupled to the housing 95, and the planetary gear carrier 85, the sun gear 80, and the planetary gears 86 are housed inside the internal gear ring 90 and the housing 95. The sun gear 80 has a drive shaft 81, and each planetary gear 86 meshes with the outer edge of the sun gear 80 and the inner edge of the internal gear ring 90. The planetary gears 86 are mounted on the planetary gear carrier 85.

[0004] However, the aforementioned existing reduction mechanisms suffer from problems such as complex assembly, insufficient precision, and concentricity misalignment. To address the inconvenience of replacement and inventory management caused by the complex assembly and numerous procedures in existing technologies, and to resolve the issue of insufficient concentricity after assembly, the machining precision of each component needs to be improved. This increases the difficulty of machining and assembly, and also raises the overall manufacturing cost. Conversely, if the machining precision is relaxed, it will lead to unstable assembly and poor meshing, resulting in noise and poor transmission efficiency during operation. In other words, how to solve the aforementioned problems is what the industry and users expect, and it is also what this invention aims to explore.

[0005] In view of this, the inventor has devoted himself to research and application of theoretical knowledge to address the problems faced by the prior art. With years of rich design, development and practical manufacturing experience in the relevant industry, the inventor has improved the existing structure and finally successfully developed a modular coaxial gear reduction mechanism to overcome the troubles and inconveniences caused by the need for step-by-step installation of components in the existing reduction mechanism. Summary of the Invention

[0006] Therefore, the main objective of this invention is to provide a modular coaxial gear reduction mechanism, which allows most components to be modularized, thereby facilitating the assembly, repair, and inventory management of the reduction mechanism.

[0007] Furthermore, a secondary objective of this invention is to provide a modular coaxial gear reduction mechanism that improves the concentricity of the reduction mechanism after assembly, simplifies processing and assembly, and further reduces its overall manufacturing cost.

[0008] Furthermore, another major objective of this invention is to provide a modular coaxial gear reduction mechanism. Due to its high concentricity after assembly, the overall assembly structure of the reduction mechanism is more stable and the meshing degree is improved. This reduces vibration and noise during operation, extends its service life, and improves transmission efficiency.

[0009] Based on this, the present invention mainly achieves the aforementioned objectives and effects through the following technical means:

[0010] A modular coaxial gear reduction mechanism, characterized in that it comprises:

[0011] A casing;

[0012] A drive shaft, which is pivotally mounted on the machine housing;

[0013] An internal gear ring rail, which is locked to the machine housing;

[0014] A coaxial gear set includes a sun gear, a planetary gear set, and an output component. The sun gear is selectively locked to the aforementioned drive shaft and rotates synchronously. The planetary gear set is pivotally located between the two ends of the sun gear and can mesh synchronously with the sun gear and the internal gear ring rail. The output component is located on the side of the planetary gear set opposite to the internal gear ring rail and can be driven by the planetary gear set.

[0015] The housing has at least one first mounting chamber for mounting the drive shaft and coaxial gear set, and the front and rear ends of the housing are respectively fitted with a first housing cover and a second housing cover. The two ends of the drive shaft are pivotally mounted between the housing and the first housing cover by a bearing.

[0016] The drive shaft has a mounting section and a coupling part at one end, and the sun gear shaft of the coaxial gear set has a corresponding coupling hole that fits through the mounting section. A coupling block that can synchronously engage with the coupling part of the drive shaft is embedded in the coupling hole, and a locking fastener is used to press the coupling block through and lock it onto the drive shaft.

[0017] The planetary gear set of the coaxial gear set has a first gear carrier and a second gear carrier pivotally mounted at both ends of the sun gear. Furthermore, a plurality of planetary gears are pivotally mounted around the sun gear between the first gear carrier and the second gear carrier. Each planetary gear has a first gear portion that can synchronously mesh with the sun gear and the internal gear ring rail, and each planetary gear has a second gear portion that can mesh with the output component. The output component is pivotally mounted on the second gear carrier of the planetary gear set.

[0018] The first and second gear carriers of the planetary gear set are pivotally mounted at both ends of the sun gear by a first bearing and a second bearing, respectively.

[0019] The second gear carrier of the planetary gear set has a shaft tube for mounting the output component, and the output component is pivotally mounted on the shaft tube by a third bearing.

[0020] The second wheel frame has a first-stage mounting hole at the center of the axle tube for inserting a mounting shaft, and one end of the mounting shaft can be disposed at one end of the sun gear through the second bearing, wherein the mounting shaft has a through hole.

[0021] The first and second gear carriers of the planetary gear set have a plurality of countersunk pins that abut against each other on their opposing surfaces, and each countersunk pin is fitted with a screw that can lock them in place, so that the first and second gear carriers on the sun gear can be fitted together as one unit.

[0022] The first and second wheel frames are provided with a plurality of shafts for mounting planetary gears, and each shaft is pivotally mounted with a corresponding planetary gear by at least one bearing.

[0023] The inner edge of the output component has an internal toothed edge that can mesh with the second gear portion of each planetary gear, and the outer edge of the output component has a drive wheel portion that can transmit power.

[0024] The drive wheel portion on the outer edge of the output component is an external gear surface or a friction wheel surface.

[0025] Therefore, through the specific implementation of the above-mentioned technical means, the present invention can selectively assemble modular coaxial gear sets on the drive shaft of the housing, which can facilitate assembly and repair, facilitate warehouse management, reduce storage space, and reduce assembly difficulty and cost. At the same time, installing modular coaxial gear sets on the drive shaft can reduce the accumulation of errors, improve the concentricity of the assembled reduction mechanism, make the overall assembly structure of the reduction mechanism more stable, improve the meshing degree, reduce vibration and noise during operation, extend its service life, and improve transmission efficiency, thereby increasing the added value of the product and improving its economic benefits.

[0026] To enable a further understanding of the structure, features and other objectives of the present invention, preferred embodiments of the invention are described below in detail with reference to the accompanying drawings, so that those skilled in the art can implement them. Attached Figure Description

[0027] Figure 1 This is a partial three-dimensional cross-sectional schematic diagram of an existing deceleration mechanism, used to illustrate its main structural features.

[0028] Figure 2 This is a side view sectional diagram of an existing deceleration mechanism, used to illustrate its composition.

[0029] Figure 3 This is a three-dimensional appearance schematic diagram of the modular coaxial gear reduction mechanism of the present invention.

[0030] Figure 4 This is a schematic diagram of most of the modular coaxial gear reduction mechanism of the present invention, used to illustrate the state of its main modules and their relative relationships.

[0031] Figure 5 This is a side cross-sectional view of the modular coaxial gear reduction mechanism of the present invention.

[0032] Figure 6 This is a three-dimensional exploded view of the coaxial gear group in the modular coaxial gear group reduction mechanism of the present invention, to illustrate the state of each component and their relative relationships.

[0033] Figure 7 This is a side view sectional schematic diagram of the coaxial gear set in the modular coaxial gear set reduction mechanism of the present invention.

[0034] Figure 8 The modular coaxial gear reduction mechanism of the present invention is used in... Figure 7 The schematic diagram of section 8-8 in the figure illustrates its first engagement and action state.

[0035] Figure 9 The modular coaxial gear reduction mechanism of the present invention is used in... Figure 7 The schematic diagram of section 9-9 in the figure illustrates its second engagement and action state.

[0036] Explanation of reference numerals in the attached drawings: 10-House casing; 11-First mounting chamber; 12-Second mounting chamber; 13-First cover; 14-Second cover; 15-Drive shaft; 16-Mounting section; 17-Coupling part; 18-Internal gear ring rail; 20-Coaxial gear set; 21-Sun gear; 22-Coupling hole; 23-Coupling block; 24-Locking fastener; 25-First bearing; 27-Second bearing; 30-Planetary gear set; 31-First wheel frame; 310-Counter-hole column; 311-Screw lock; 32-Shaft Rod; 321-Bearing; 33-Planetary gear; 331-First gear section; 332-Second gear section; 35-Second gear carrier; 350-Counterhead pin; 351-Screw lock; 36-Shaft tube; 360-Step mounting hole; 361-Mounting shaft; 362-Through hole; 40-Output component; 41-Third bearing; 42-Internal gear edge; 45-Drive wheel section; 80-Sun gear; 81-Drive shaft; 85-Planetary gear carrier; 86-Planetary gear; 90-Internal gear ring; 95-Housing. Detailed Implementation

[0037] This invention is a modular coaxial gear reduction mechanism. In the specific embodiments and components of this invention illustrated in the accompanying drawings, all references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are for convenience of description only and are not intended to limit the invention or restrict its components to any position or spatial orientation. The dimensions specified in the drawings and specification may be varied according to the design and requirements of this invention without departing from its scope of protection.

[0038] The modular coaxial gear reduction mechanism of the present invention is configured as follows: Figure 3 , Figure 4 As shown, it consists of a housing 10, a drive shaft 15 located at the axis of the housing 10, an internal gear ring rail 18 located on the inner edge of the housing 10, and a coaxial gear assembly 20 located between the drive shaft 15 and the internal gear ring rail 18. When installing, the pre-completed modular coaxial gear assembly 20 can be placed on the drive shaft 15, so that it has the advantages of easy assembly and high coaxiality.

[0039] For a detailed description of the preferred embodiment of the modular coaxial gear reduction mechanism of the present invention, please refer to [link to relevant documentation]. Figure 4 , Figure 5As shown, the housing 10 has a first mounting chamber 11 and a second mounting chamber 12. The first mounting chamber 11 is used to house the drive shaft 15 and the coaxial gear set 20, while the second mounting chamber 12 is used to house the driven assembly (not shown) that meshes with the coaxial gear set 20. The front and rear ends of the housing 10 are respectively locked with a first cover 13 and a second cover 14 to protect the internal components. The two ends of the drive shaft 15 can be pivotally mounted between the housing 10 and the first cover 13 using a bearing. The end of the drive shaft 15 that protrudes from the housing 10 has a mounting section 16 and a coupling portion 17 for mounting the coaxial gear set 20 and generating a linkage relationship. The internal gear ring rail 18 is locked to the inner edge of the first mounting chamber 11 of the housing 10 corresponding to the point where the drive shaft 15 protrudes.

[0040] For a detailed description of the aforementioned coaxial gear set 20, please refer to [link to relevant documentation]. Figure 6 and Figure 7 As shown, the coaxial gear set 20 includes a modular structure comprising a sun gear 21, a planetary gear set 30, and an output component 40. The sun gear 21 has a coupling hole 22 that passes through the mounting section 16 of the aforementioned drive shaft 15. A coupling block 23 is embedded within the coupling hole 22, capable of synchronously engaging the coupling portion 17 of the drive shaft 15. A locking fastener 24 can be used to press the coupling block 23 and lock it onto the drive shaft 15 (e.g., ...). Figure 5As shown), the coaxial gear set 20 can be selectively mounted on the mounting section 16 of the drive shaft 15 using the sun gear 21. The planetary gear set 30 is pivotally mounted at both ends of the sun gear 21 using a first bearing 25 and a second bearing 27, respectively. The planetary gear set 30 has a first gear carrier 31, a second gear carrier 35, and a plurality of planetary gears 33 meshing around the sun gear 21. The first gear carrier 31 is mounted on one end of the sun gear 21 via the first bearing 25. The second gear carrier 35 has a shaft tube 36 at its center for mounting the output component 40, and the free end of the shaft tube 36 can be pivotally mounted on the second housing 14 via a bearing. The shaft tube 36 of the second gear carrier 35 has a stepped mounting hole 360 ​​at its center for pressing the end of a mounting shaft 361 through which one end of the mounting shaft 361 can pass. Two bearings 27 are located at the other end of the sun gear 21. The mounting shaft 361 has a through hole 362 for inserting a hand tool into the locking fastener 24 of the aforementioned sun gear 21 coupling block 23. The first and second gear carriers 31 and 35 have a plurality of countersunk pins 310 and 350 that abut against each other on their opposing surfaces, and each is fitted with a locking screw 311 or 351 that can be locked in place. This allows the first and second gear carriers 31 and 35 on the sun gear 21 to be fitted together as one unit. A plurality of shafts 32 for mounting planetary gears 33 are provided between the first and second gear carriers 31 and 35, and each shaft 32 is pivotally mounted with a planetary gear 33 using at least one bearing 321. Each planetary gear 33 has a first gear portion 331 that can mesh synchronously with the sun gear 21 and the internal gear ring rail 18 (e.g., ...). Figure 8 As shown), and each planetary gear 33 has a second gear 332 integrally connected to one side of the first gear portion 331 that can mesh with the output member 40 (as shown). Figure 9 As shown), the sun gear 21 of the coaxial gear set 20 can synchronously drive the first gear portion 331 of the planetary gear 33, and the planetary gear 33 is constrained by the internal gear ring rail 18 to generate self-revolution. At the same time, the second gear portion 332 of each planetary gear 33 synchronously drives the output member 40. The output member 40 is pivotally mounted on the second gear carrier 35 shaft tube 36 of the planetary gear set 30 by a third bearing 41. The inner edge of the output member 40 has an internal tooth edge 42 that can mesh with the second gear portion 332 of the planetary gear 33 of the planetary gear set 30. The outer edge of the output member 40 has a drive wheel portion 45 that can mesh with the driven member (not shown in the figure). The drive wheel portion 45 can be an external gear surface or a friction wheel surface. The drive wheel portion 45 of the output member 40 of the present invention is an external gear surface.

[0041] This allows the coaxial gear set 20 to be pre-assembled and selectively assembled onto the drive shaft 15 of the housing 10, and synchronously meshed with the internal gear ring rail 18 to form a modular coaxial gear set reduction mechanism.

[0042] As for the actual operation of the modular coaxial gear reduction mechanism of the present invention, it is as follows: Figure 3 , Figure 4 and Figure 5 As shown, since the planetary gear set 30 and the output component 40 are mounted on the sun gear 21 of the coaxial gear set 20, the coaxial gear set 20 can be pre-assembled into a modular integrated structure in the factory. During assembly, the coaxial gear set 20 can be assembled onto the drive shaft 15 in one go with the sun gear 21, allowing the first gear portion 331 of the planetary gear 33 of the planetary gear set 30 of the coaxial gear set 20 to mesh with the internal gear ring rail 18 on the housing 10. The locking fastener 24 of the inner coupling block 23 of the sun gear 21 is used to lock it onto the drive shaft 15. Simultaneously, when the drive shaft 15 is driven, the sun gear 21 of the coaxial gear set 20 can be driven synchronously, allowing the sun gear 21 to drive the planetary gear 33 synchronously. This is limited by the meshing of the first gear portion 331 of the planetary gear 33 with the internal gear ring rail 18 (e.g., ...). Figure 8 As shown), the planetary gear 33 can rotate synchronously relative to the sun gear 21 in a self-rotating manner. Furthermore, since the second gear portion 332 of each planetary gear 33 is an integral structure with the first gear portion 331, and the second gear portion 332 of each planetary gear 33 meshes with the output component 40 (as shown), the planetary gear 33 can rotate synchronously relative to the sun gear 21 in a self-rotating manner. Figure 9 As shown in the figure, each of the planetary gears 33 can synchronously drive the output element 40, and thus drive the driven element (not shown in the figure).

[0043] Through the foregoing design and description, the modular coaxial gear reduction mechanism of the present invention utilizes modular coaxial gear sets 20 selectively assembled on the transmission shaft 15 of the housing 10, which can facilitate assembly and repair, and facilitate warehouse management, reduce storage space, thereby reducing assembly difficulty and cost. At the same time, since the sun gear 21, planetary gear 33 and output component 40 are mounted on the transmission shaft 15 with modular coaxial gear sets 20, the accumulation of errors can be reduced, the concentricity of the reduction mechanism after assembly can be improved, the overall assembly structure of the reduction mechanism can be made more stable, and the meshing degree can be improved, so that vibration and noise can be reduced during operation, thereby extending its service life and improving transmission efficiency.

[0044] Therefore, it can be understood that the present invention is a highly creative creation. In addition to effectively solving the problems faced by the prior art, it also greatly improves the efficiency. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the claims, but all of them will fall within the protection scope of the present invention.

Claims

1. A modular in-line tooth set reduction mechanism characterized by, It comprises: a casing; a transmission shaft, which is pivotally arranged in the casing; an inner ring track, which is locked in the casing; a coaxial gear set, which comprises a sun gear, a planetary gear set and an output member, wherein the sun gear is selectively locked to the transmission shaft and rotates synchronously, the planetary gear set is pivotally arranged between the two ends of the sun gear, the planetary gear set can synchronously mesh with the sun gear and the inner ring track, and the output member is arranged on the side of the planetary gear set away from the inner ring track and can be driven by the planetary gear set; wherein one end of the transmission shaft has a mounting section and a coupling part, the sun gear of the coaxial gear set has a corresponding coupling hole which is sleeved on the mounting section, and a coupling block which can synchronously engage with the coupling part of the transmission shaft is embedded in the coupling hole, and a locking member is used to pass through the coupling block and then lock it on the transmission shaft.

2. The modular in-line tooth set reduction mechanism of claim 1, wherein: The casing has at least a first mounting chamber for mounting the transmission shaft and the coaxial gear set, and the front and rear ends of the casing are respectively locked with a first cover and a second cover, and the two ends of the transmission shaft are respectively pivotally arranged between the casing and the first cover by a bearing.

3. The modular in-line tooth set reduction mechanism of claim 1, wherein: The planetary gear set of the coaxial gear set is pivotally arranged with a first carrier and a second carrier on the two ends of the sun gear respectively, and a plurality of planetary gears are pivotally arranged on the periphery of the sun gear between the first carrier and the second carrier, each planetary gear has a first wheel part which can synchronously mesh with the sun gear and the inner ring track, and each planetary gear has a second wheel part which can mesh with the output member, and the output member is pivotally arranged on the second carrier of the planetary gear set.

4. The modular in-line tooth set reduction mechanism of claim 3, wherein: The two ends of the sun gear are respectively pivotally arranged with a first bearing and a second bearing on the first carrier and the second carrier of the planetary gear set.

5. The modular in-line tooth set reduction mechanism of claim 4, wherein: The second carrier of the planetary gear set has a shaft tube on the axis for mounting the output member, and the shaft tube is pivotally arranged with the output member by a third bearing.

6. The modular in-line tooth set reduction mechanism of claim 5, wherein: The center of the shaft tube of the second carrier has a stepped mounting hole for inserting a mounting shaft, and one end of the mounting shaft can pass through the second bearing and be arranged on one end of the sun gear, wherein the mounting shaft has a through hole.

7. The modular in-line tooth set reduction mechanism of claim 3, wherein: The opposite surfaces of the first carrier and the second carrier of the planetary gear set are formed with a plurality of opposite abutting counterbores, and the counterbores are respectively provided with a screw member which can be locked relative to each other, so that the first carrier and the second carrier on the sun gear can be integrated.

8. The modular in-line tooth set reduction mechanism of claim 3, wherein: A plurality of shaft rods for mounting the planetary gears are arranged between the first carrier and the second carrier, and each shaft rod is pivotally arranged with an opposite planetary gear by at least one bearing.

9. The modular in-line tooth set reduction mechanism of claim 3, wherein: The inner edge of the output member has a toothed rim which can mesh with the second wheel part of each planetary gear, and the outer edge of the output member has a driving wheel part which can be driven.

10. The modular in-line tooth set reduction mechanism of claim 9, wherein: The driving wheel part of the output member is a gear wheel surface or a friction wheel surface.

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