Short wheelbase high speed ratio gear set structure

Abstract

This invention provides a short-wheelbase, high-ratio gear set structure, which consists of a drive shaft pivotally mounted on a housing shaft. The drive shaft has a sun gear, and an internal gear ring rail is locked to the inner edge of the housing. A planetary gear set is positioned between the sun gear and the internal gear ring rail. The planetary gear set has a plurality of self-rotating, orbiting planetary gears surrounding the sun gear. Each planetary gear has a first gear portion that meshes synchronously with the sun gear and the internal gear ring rail, and each planetary gear also has a second gear portion that rotates synchronously with the first gear portion. An output component is fitted around the planetary gear set. The inner edge of the output component has an internal toothed edge that meshes with the second gear portion of each planetary gear. This structure creates a short wheelbase, effectively reducing volume. Furthermore, the planetary gear set can simultaneously rotate in the opposite direction when driving the output component, forming a high speed ratio, further improving its deceleration effect, reducing interference, making overall operation smoother, reducing vibration and noise, and extending its service life.

Description

Technical Field

[0001] This invention relates to the technical field of a speed reduction mechanism, specifically a short-wheelbase, high-ratio gear set structure, which can reduce the volume and amplify the speed reduction effect, while reducing vibration and noise to avoid operational interference and extend its service life. Background Technology

[0002] Because motors have high rotational speeds, in some fields, direct driving can easily lead to excessively high speeds and insufficient torque, failing to achieve the intended work purpose and affecting operational convenience. Therefore, in these fields, a speed reducer is typically installed on the motor output shaft to reduce the speed and output greater torque. There are many types of existing speed reducers. For example, the previous patent application No. 097213180 in Taiwan, entitled "Speed ​​Reduction Device," is the most common type: a planetary gear reducer. This overcomes the problems of complex structure, operating noise, and vibration associated with traditional speed reducers using large and small gear sets.

[0003] However, existing reduction ratios are limited. To achieve a larger reduction ratio, the gear ratio between the sun gear and the peripheral planetary gears needs to be increased, which increases the outer diameter of the entire reduction gear and also affects its output torque. To address this issue, the industry has developed multi-stage planetary gears. For example, the previous application of Taiwan Utility Model Patent Application No. 102200801, "Planetary Gear Reducer," has a first planetary gear and a second planetary gear on its gear carrier. The first gear meshes with the sun gear and a fixed first ring gear, while the second gear meshes with the sun gear and a second ring gear that connects to the transmission component. Since the first and second gears are located on the gear carrier and mesh with the sun gear synchronously, interference problems will occur when the gear ratio between the first and second gears is incorrect. This can cause vibration and noise during operation and also increases the overall wheelbase. Furthermore, the synchronous meshing of the first and second gears with the sun gear limits the range of the gear ratio, making it impossible to effectively improve the reduction effect.

[0004] In other words, existing reduction mechanisms cannot simultaneously achieve both reduced size and large reduction ratio. They also generate operating noise and vibration due to interference issues, and may even cause gear wear and shorten service life. How to solve the aforementioned problems is what the industry and users expect, and it is also what this invention aims to explore.

[0005] Therefore, in response to the problems faced by the prior art, the inventors devoted themselves to research and applied theoretical knowledge, and based on years of design, development and practical experience in the relevant industry, improved the shortcomings of the existing structure, and finally successfully developed a short wheelbase high speed ratio gear group structure to overcome the troubles and inconveniences caused by the prior art. Summary of the Invention

[0006] Therefore, the main objective of this invention is to provide a short-wheelbase, high-speed-ratio gear set structure that can simultaneously achieve a short wheelbase and a high reduction ratio, effectively reduce its volume, and improve the reduction effect.

[0007] Furthermore, a secondary objective of this invention is to provide a short-wheelbase, high-ratio gear train structure that reduces interference, makes overall operation smoother, and reduces vibration and noise.

[0008] Furthermore, another major objective of this invention is to provide a short-wheelbase, high-ratio gear set structure that makes the overall structure more stable, improves meshing, reduces unnecessary wear 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, which include:

[0010] A casing;

[0011] A drive shaft is pivotally mounted at the center of the housing, and a sun gear is mounted on the drive shaft;

[0012] An internal gear ring rail, which is locked to the inner edge of the housing;

[0013] A planetary gear set has a first gear carrier and a second gear carrier opposite each other. Furthermore, a plurality of stage planetary gears are pivotally arranged between the first and second gear carriers around the sun gear. Each stage planetary gear has a first gear portion that can mesh synchronously with the sun gear and the internal gear ring rail. Each stage planetary gear also has a second gear portion that rotates synchronously with the first gear portion.

[0014] An output component is pivotally mounted on the second gear carrier of the planetary gear set. The inner edge of the output component has an internal tooth edge that can mesh with the second gear portion of each planetary gear of the set. The outer edge of the output component has a drive wheel portion that can engage with at least one driven component.

[0015] Furthermore, the present invention utilizes the following technical means to further achieve the aforementioned objectives and effects; such as:

[0016] The housing has at least one first mounting chamber for mounting the drive shaft, and a first housing cover and a second housing cover are respectively locked at the front and rear ends of the housing. The two ends of the drive shaft are pivotally mounted between the housing and the first housing cover by a bearing.

[0017] The drive shaft has a mounting section and a coupling part at one end, and the sun gear shaft 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 can be locked onto the drive shaft by pressing the coupling block with a locking fastener.

[0018] 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.

[0019] 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 pivotally mounted to one end of the sun gear. The mounting shaft has a through hole for inserting a hand tool.

[0020] The first and second wheel 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 wheel carriers can be fitted together as a whole.

[0021] The first and second wheel carriers are provided with a plurality of shafts for mounting the progressive planetary gears, and each shaft is pivotally mounted with a corresponding progressive planetary gear by at least one bearing.

[0022] The drive wheel portion on the outer edge of the output component is an external gear surface or a friction wheel surface.

[0023] The first and second gear carriers of the planetary gear set are pivotally mounted on both ends of the sun gear via a first bearing and a second bearing, respectively, so that the sun gear, the planetary gear set and the output component form a modular coaxial gear set.

[0024] Therefore, through the specific implementation of the above-mentioned technical means, the present invention enables the first gear of each stage of the planetary gear set to mesh synchronously with the sun gear and the internal gear ring rail, while the second gear of each stage of the planetary gear sets meshes separately with the internal tooth edge of the output component, forming a dual-input single-output structure. This results in a short wheelbase structure, which effectively reduces the volume. Furthermore, the planetary gear set can simultaneously rotate in the opposite direction when driving the output component, forming a large speed ratio, which further improves its deceleration effect, reduces interference, makes the overall operation smoother, reduces vibration and noise, and extends its service life, thereby increasing the added value of the product and improving its economic benefits.

[0025] 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

[0026] Figure 1 This is a schematic diagram of the appearance of the short-axis-pitch, high-ratio gear group structure of the present invention.

[0027] Figure 2 This is a schematic diagram of most of the short-axis-pitch, high-ratio gear group structure of the present invention, used to illustrate the state of its main modules and their relative relationships.

[0028] Figure 3This is a three-dimensional exploded schematic diagram of the coaxial gear group in the short-axis-pitch, high-ratio gear group structure of the present invention, to illustrate the state of each component and their relative relationships.

[0029] Figure 4 This is a side cross-sectional view of the short-axis-pitch, high-ratio gear group structure of the present invention.

[0030] Figure 5 The present invention relates to a short-wheelbase, high-ratio gear set structure. Figure 4 A cross-sectional view at position 5-5 illustrates its first engagement and action pattern.

[0031] Figure 6 The present invention relates to a short-wheelbase, high-ratio gear set structure. Figure 4 A cross-sectional view at position 6-6 illustrates its second engagement and action pattern.

[0032] Explanation of reference numerals in the attached drawings: 10-House casing; 11-First mounting chamber; 12-Second mounting chamber; 13-First housing cover; 14-Second housing 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; 321-Bearing; 33-Stage planetary gear; 331-First gear section; 332-Second gear section; 35-Second gear frame; 350-Counter-hole column; 351-Screw lock; 36-Shaft tube; 360-Stage mounting hole; 361-Mounting shaft; 362-Through hole; 40-Output component; 41-Third bearing; 42-Internal tooth edge; 45-Drive wheel section. Detailed Implementation

[0033] This invention relates to a short-wheelbase, high-ratio gear train structure. In the accompanying drawings, specific embodiments and components of this invention are illustrated. All references to front and rear, left and right, top and bottom, upper and lower, and horizontal and vertical are for ease of description only and are not intended to limit the invention or restrict its components to any position or spatial orientation. 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.

[0034] The structure of the short-wheelbase, high-ratio gear set of this invention is as follows: Figure 1 , Figure 2 The disclosed structure 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 set 20 located between the drive shaft 15 and the internal gear ring rail 18.

[0035] For a detailed description of the preferred embodiment of the short-wheelbase, high-ratio gear group structure of the present invention, please refer to [link to previous document]. Figure 1 , Figure 2 As shown, the housing 10 has a first mounting chamber 11 and a second mounting chamber 12. The aforementioned drive shaft 15 is pivotally mounted in the first mounting chamber 11 for mounting the coaxial gear set 20 on the drive shaft 15. The second mounting chamber 12 is used to install a driven component (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 extends out of the housing 10 has a mounting section 16 and a coupling portion 17 for mounting the aforementioned coaxial gear set 20 and generating a linkage relationship. The internal gear ring rail 18 is locked in the inner edge of the first mounting chamber 11 of the housing 10 so that the coaxial gear set 20 can mesh with each other.

[0036] For a detailed description of the aforementioned coaxial gear set 20, please refer to [link to relevant documentation]. Figure 2 , Figure 3 and Figure 4 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 and the drive shaft 15 can be an integral or combined structure. The sun gear 21 and drive shaft 15 of this invention are primarily a combined structure. 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 in 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 4 As 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, while the planetary gear set 30 is pivotally mounted on the sun gear 21 via a first bearing 25 and a second bearing 27 located at both ends of the sun gear 21. According to some embodiments, the first and second bearings 25 and 27 of the planetary gear set 30 can also be located at the corresponding ends of the drive shaft 15 on the sun gear 21. Furthermore, the sun gear 21 has a first gear carrier 31, a second gear carrier 35, and a plurality of meshing planetary gears 33 surrounding the sun gear 21 at each end. The first gear carrier 31 is mounted on one end of the sun gear 21 via the aforementioned first bearing 25, while 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 (e.g., Figure 4As shown), the second wheel frame 35 has a stepped mounting hole 360 ​​at the center of its shaft tube 36, through which the end of a mounting shaft 361 is pressed. One end of the mounting shaft 361 can be mounted on the other end of the sun gear 21 via the second bearing 27. The mounting shaft 361 has a through hole 362 for inserting a hand tool into the locking fastener 24 that operates the aforementioned sun gear 21 coupling block 23. The first and second wheel frames 31 and 35 have a plurality of countersunk posts 310 and 350 that abut against each other on their opposing surfaces. Each of the sun gear 21 has a locking screw 311 or 351 that can be locked in place, allowing the first and second gear carriers 31 and 35 on the sun gear 21 to be fitted together. A plurality of shafts 32 for mounting the progressive planetary gears 33 are provided between the first and second gear carriers 31 and 35, and each shaft 32 is pivotally mounted with a progressive planetary gear 33 using at least one bearing 321. Each progressive planetary gear 33 has a first gear portion 331 that can simultaneously mesh with the sun gear 21 and the internal gear ring rail 18 (e.g., ...). Figure 5 As shown), and on one side of the first gear portion 331 of each planetary gear 33, a second gear portion 332 that can mesh with the output member 40 is integrally formed (as shown). Figure 6 As shown), this allows the sun gear 21 of the coaxial gear set 20 to synchronously drive the first gear portion 331 of the stage planetary gears 33, causing each stage planetary gear 33 to rotate in the opposite direction (relative to the direction of rotation of the sun gear 21, the same below). Simultaneously, constrained by the fixed internal gear ring rail 18, each stage planetary gear 33 can drive the planetary gear set 30 to synchronously and in the same direction of revolution relative to the sun gear 21 (e.g., as shown). Figure 5 (As shown), furthermore, since the second gear 332 of each planetary gear 33 can synchronously drive the output member 40 to produce an output that rotates in the opposite direction (as shown), Figure 6 As shown), and because the planetary gear set 30 has the aforementioned same-direction revolution, a rotation phenomenon is generated, thereby increasing the deceleration effect. The output component 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 component 40 has an inner tooth edge 42 that can mesh with the second gear part 332 of the planetary gear 33 of the planetary gear set 30. The outer edge of the output component 40 has a drive wheel part 45 that can mesh with the driven part (not shown in the figure). The drive wheel part 45 can be an external gear surface or a friction wheel surface. The drive wheel part 45 of the output component 40 of the present invention is an external gear surface.

[0037] In this way, the first gear portion 331 of each planetary gear 33 of the planetary gear set 30 can be synchronously engaged with the internal gear ring rail 18, and the integrally formed second gear portion 332 can be directly engaged with the internal gear edge 42 of the output member 40, thereby forming a short-axis-pitch, high-speed-ratio gear set structure.

[0038] As for the actual operation of the short-wheelbase, high-ratio gear group structure of the present invention, it is as follows: Figure 3 , Figure 4 and Figure 5 As shown, since the sun gear 21 of the coaxial gear set 20 is equipped with a planetary gear set 30 and an output component 40, the coaxial gear set 20 can be directly assembled onto the drive shaft 15 in a modular structure. This allows the first gear portion 331 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. Furthermore, 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 coaxial gear set 30 can be driven synchronously. The sun gear 21 of group 20 rotates synchronously, so that the sun gear 21 can synchronously drive the planetary gear set 30 through the first wheel portion 331 of each stage of the planetary gear 33, causing each stage of the planetary gear set 30 to rotate in the opposite direction (relative to the rotation direction of the sun gear 21, the same below). At the same time, constrained by the fixed internal gear ring rail 18, the first and second wheel carriers 31 and 35 of the planetary gear set 30 drive each stage of the planetary gear 33 to rotate synchronously and in the same direction relative to the sun gear 21 (e.g., Figure 5 (As shown), furthermore, since the second gear portion 332 of each planetary gear 33 meshes with the internal tooth edge 42 of the output member 40, the output member 40 can be synchronously driven to produce reverse rotation (as shown). Figure 6 (As shown), and because the planetary gear set 30 has the aforementioned same-direction revolution, the planetary gear set 30 will rotate, which will increase the deceleration effect. Furthermore, since the output member 40 uses the drive wheel part 45 on the outer edge to engage with the driven member, it can drive the driven member (not shown in the figure).

[0039] Through the foregoing design and description, the short-wheelbase, high-ratio gear set structure of the present invention utilizes a coaxial gear set 20 assembled on the transmission shaft 15 of the housing 10. The first gear portion 331 of each stage planetary gear 33 of the planetary gear set 30 can mesh synchronously with the sun gear 21 and the internal gear ring rail 18, while the second gear portion 332 of each stage planetary gear 33 meshes separately with the internal tooth edge 42 of the output member 40, forming a dual-input, single-output structure, thus reducing the volume. Furthermore, the planetary gear set 30 can simultaneously rotate in the opposite direction when driving the output member 40, forming a high speed ratio, which can further improve its deceleration effect, reduce interference, make the overall operation smoother, reduce vibration and noise, and make the overall assembly structure of the deceleration mechanism more stable and improve the meshing degree, thereby extending its service life.

[0040] The above description is illustrative only and not restrictive of the present invention. 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, and all such modifications, variations or equivalents will fall within the protection scope of the present invention.

Claims

1. A short-wheelbase, high-ratio gear set structure, characterized in that, Includes: A casing; A drive shaft is pivotally mounted on a housing. The drive shaft has a sun gear. One end of the drive shaft has a mounting section and a coupling section. The center of the sun gear shaft has a corresponding coupling hole that passes through the mounting section. A coupling block that can synchronously engage with the coupling section of the drive shaft is embedded in the coupling hole. A locking fastener can be used to press the coupling block through and lock it onto the drive shaft. An internal gear ring rail, which is locked to the machine housing; A planetary gear set having a first gear carrier and a second gear carrier opposite each other, with a plurality of stage planetary gears pivotally arranged between the first gear carrier and the second gear carrier around the sun gear, and each stage planetary gear having a first gear portion capable of synchronously meshing with the sun gear and the internal gear ring rail, and each stage planetary gear having a second gear portion that rotates synchronously with the first gear portion. An output component has an inner toothed edge on its inner edge that can mesh with the second gear portion of each planetary gear of that class, and an outer edge on its outer edge that has a drive wheel portion capable of transmission.

2. The short-wheelbase, high-ratio gear set structure as described in claim 1, characterized in that: The housing has at least one first mounting chamber for mounting the drive shaft, and a first housing cover and a second housing cover are respectively locked at the front and rear ends of the housing. The two ends of the drive shaft are pivotally mounted between the housing and the first housing cover by a bearing.

3. The short-wheelbase, high-ratio gear set structure as described in claim 1, characterized in that: 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.

4. The short-wheelbase, high-ratio gear set structure as described in claim 3, characterized in that: 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 pivotally mounted to one end of the sun gear. The mounting shaft has a through hole for inserting a hand tool.

5. The short-wheelbase, high-ratio gear set structure as described in claim 1, characterized in that: The first and second wheel 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 wheel carriers can be fitted together as a whole.

6. The short-wheelbase, high-ratio gear set structure as described in claim 1, characterized in that: The first and second wheel carriers are provided with a plurality of shafts for mounting the progressive planetary gears, and each shaft is pivotally mounted with a corresponding progressive planetary gear by at least one bearing.

7. The short-wheelbase, high-ratio gear set structure as described in claim 1, characterized in that: The drive wheel portion on the outer edge of the output component is an external gear surface or a friction wheel surface.

8. The short-wheelbase, high-ratio gear set structure as described in any one of claims 1 to 7, characterized in that: The first and second gear carriers of the planetary gear set are pivotally mounted on both ends of the sun gear via a first bearing and a second bearing, respectively, so that the sun gear, the planetary gear set and the output component form a modular coaxial gear set.

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