Transmission structure

Abstract

The present invention refers to a transmission structure, which includes a transmission mechanism and at least one speed-up mechanism, wherein the transmission mechanism is provided with an initial sun gear on a fixed shaft using a one-way bearing, and a plurality of initial planetary gears pivoted on an output bracket are meshed outside the initial sun gear, and each of the initial planetary gears is synchronously meshed with the inner edge of a gear ring, and each of the speed-up mechanisms is relatively pivoted on the fixed shaft through a shaft tube, and a sun gear with an outer diameter smaller than that of the initial sun gear is provided on the shaft tube, and a plurality of planetary gears meshing with the sun gear are pivoted on the aforementioned output bracket, and each of the planetary gears is mutually connected and rotates synchronously, and the shaft tube of each speed-up mechanism is separately provided with a brake group for selectively stopping the rotation of the relative shaft tube, thereby allowing a driving wheel driven by a power source to mesh with the outer edge of the gear ring of the transmission mechanism, so that the output bracket can generate output, and the shaft tube is fixed by the brake group of each speed-up mechanism to achieve the speed-up effect.

Description

Technical Field

[0001] The present invention relates to a transmission technology for transmission, and more specifically, to a transmission structure for changing the rotational speed, thereby facilitating power transmission, while having a simple structure and fast speed change, and without generating a dull feeling during speed change, making the speed change more accurate and reliable. Background Art

[0002] The transmission structure mainly utilizes a combination of gears of different diameters between the driving source and the driven component to form different gear ratios to achieve the purpose of speed change. The power source of the transmission structure of existing electric vehicles is mainly the electric motor. Therefore, the speed change of its transmission structure mainly comes from at least two clutches provided on the drive shaft to respectively actuate the transmission wheels with different gear ratios to drive the driven wheel. The aforementioned clutch is composed of a clutch group and a brake group that can actuate the clutch group. The clutch group is composed of a plurality of clips connecting the drive shaft and a plurality of connecting the transmission wheels, which are stacked at intervals. The brake group is used to actuate the clamps to tightly engage or separate.

[0003] However, the above-mentioned existing transmission structure using a clutch for speed change requires the installation of electrical components and wires inside the clutch, which is not only complex in structure but also increases its overall width and volume. Furthermore, the clutch's power mainly comes from electromagnetic magnetic force, which uses friction to achieve the connection between the stationary and rotating parts. Therefore, the dynamic loss is very large, making it difficult to establish power transmission. In addition, there will be a window period of discontinuous power connection during speed change, and it is further easy to produce a dull feeling during the speed change process, resulting in the existing transmission structure having insufficient certainty, speed and reliability in actual use. Summary of the Invention

[0004] The main purpose of the present invention is to quickly establish power transmission through the supporting force without generating dynamic loss, thereby improving its accuracy, rapidity and reliability.

[0005] Another main purpose of the present invention is that it not only has a simple structure and a low failure rate, but also can effectively reduce the material volume and reduce the manufacturing cost.

[0006] A second main purpose of the present invention is to make the power connection during speed change direct and fast during synchronous operation, thereby increasing the speed change.

[0007] Another main purpose of the present invention is to provide direct power transmission with quick and sensitive response without producing the dull feeling of the existing clutch where the stationary part clamps the rotating part, thereby improving the smoothness of the speed change. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the three-dimensional appearance of the present invention.

[0009] Figure 2 It is a three-dimensional exploded schematic diagram of the present invention.

[0010] Figure 3 It is a schematic diagram of the partial composition decomposition of the present invention.

[0011] Figure 4 It is a side cross-sectional schematic diagram of the present invention after being assembled.

[0012] Figure 5 It is a schematic diagram of the operation of the present invention in the initial gear.

[0013] Figure 6 It is a schematic diagram of the operation of the present invention when shifting to the first up-speed gear.

[0014] Figure 7 It is a schematic diagram of the operation of the present invention when shifting to the second up-speed gear. DETAILED DESCRIPTION

[0015] The present invention is constituted as follows: Figure 1 and Figure 2 , consisting of a transmission mechanism 10 and at least one speed-increasing mechanism 20, 30, wherein the transmission mechanism 10 is driven by a driving wheel 50 actuated by a power source to generate an output, and the speed can be increased by each of the speed-increasing mechanisms 20, 30. According to certain embodiments, the present invention may have two sets of speed-increasing mechanisms 20, 30, which are respectively defined as a first speed-increasing mechanism 20 and a second speed-increasing mechanism 30, so that the present invention has an initial gear of the transmission mechanism 10, a first speed-increasing gear of the first speed-increasing mechanism 20, and a second speed-increasing gear of the second speed-increasing mechanism 30, wherein the speed of the second speed-increasing gear is greater than that of the first speed-increasing gear, and the speed of the first speed-increasing gear is greater than that of the initial gear;

[0016] For detailed structure of the present invention, please refer to Figure 2 、 Figure 3 and Figure 4The transmission mechanism 10 comprises a fixed shaft 11, an output bracket 15 and a gear ring 18 with toothed surfaces on the inner and outer edges, wherein the fixed shaft 11 can be provided with the first and second speed-increasing mechanisms 20 and 30, and the fixed shaft 11 has a convex shaft portion 110, so that the convex shaft portion 110 of the fixed shaft 11 can be provided with an initial sun gear 13 using a one-way bearing 12, and the one-way bearing 12 can enable the initial sun gear 13 to produce a reverse idling effect with the driving wheel 50 (such as when the driving wheel rotates counterclockwise, the initial sun gear is idling in the clockwise direction and cannot rotate in the reverse direction). The output bracket 15 is composed of a front plate 151, a rear plate 155 and at least two equiangular shaft rods 158 arranged between the front and rear plates 151 and 155 and parallel to the fixed shaft 11, wherein the front plate 1 The center of the output bracket 15 has an output shaft tube 152 that can be pivotally mounted on one end of the fixed shaft 11, and the rear plate 155 has a through-hole 156 for the other end of the fixed shaft 11 to pass through. The distance between the front and rear plates 151 and 155 of the output bracket 15 can accommodate the transmission mechanism 10 and the respective speed-increasing mechanisms 20 and 30. The outer diameter of the circumference surrounded by the shaft 158 ​​of the output bracket 15 is smaller than the inner diameter of the gear ring 18. In addition, a shaft bushing 16 is pivotally mounted on each of the shafts 158 of the output bracket 15. The shaft bushing 16 has an initial planetary gear 165 formed on one end of the corresponding gear ring 18. The initial planetary gear 165 of each of the shafts 158 of the output bracket 15 can synchronously mesh with the inner edge of the gear ring 18, and the outer edge of the gear ring 18 can mesh with the aforementioned driving wheel 50.

[0017] The first speed-up mechanism 20 includes a first shaft tube 21, a first sun gear 23, at least two first planetary gears 24 and a first brake group 25. The first shaft tube 21 is pivoted on the fixed shaft 11, and the end of the first shaft tube 21 has a convex shaft portion 210 adjacent to the convex shaft portion 110 of the fixed shaft 11, so that the convex shaft portion 210 of the first shaft tube 21 can use a one-way bearing 22 to set the first sun gear 23. The one-way bearing 22 can make the first sun gear 23 produce a reverse idling effect with the rotation direction of the driving wheel 50 [such as the driving wheel rotates counterclockwise, the first sun gear is in a state of idling clockwise and cannot be reversed]. The outer diameter of the first sun gear 23 is smaller than the initial sun gear 13, and each of the first planetary gears 24 can be fixed on the shaft bushing 16 of the aforementioned output bracket 15, so that the first The planetary gears 24 can rotate synchronously with the initial planetary gears 165 of the transmission mechanism 10, and each of the first planetary gears 24 can also mesh synchronously with the first sun gear 23. The gear ratio between the initial sun gear 13 of the transmission mechanism 10 and the initial planetary gears 165 is greater than the gear ratio between the first sun gear 23 and the first planetary gears 24 of the first speed-up mechanism 20, so that the first speed-up mechanism 20 has the effect of increasing the output speed of the transmission mechanism 10. The first brake assembly 25 is provided at the other end of the first shaft tube 21 and can selectively stop the rotation of the first shaft tube 21. The first brake assembly 25 of the present invention is fixedly provided with a disc 26 at one end of the first shaft tube 21, and a stop member 27 is provided around the disc 26 for selectively stopping the rotation of the disc 26. The stop member 27 can be a clamp, an electromagnet, a brake pad, etc.

[0018] The second speed-up mechanism 30 includes a second shaft tube 31, a second sun gear 32, at least two second planetary gears 33 and a second brake group 35. The second shaft tube 31 is pivotally mounted on the first shaft tube 21 of the aforementioned first speed-up mechanism 20, and the end of the second shaft tube 31 has a convex shaft portion 310 adjacent to the convex shaft portion 210 of the first shaft tube 21, so that the convex shaft portion 310 of the second shaft tube 31 can be set to the second sun gear 32, and the outer diameter of the second sun gear 32 is smaller than the first sun gear 23. In addition, each of the second planetary gears 33 can be fixed on the side of the first planetary gear 24 on the shaft bushing 16 of the aforementioned output bracket 15 that is different from the initial planetary gear 165, so that the second planetary gear 33 can rotate synchronously with the aforementioned initial planetary gear 165 and the adjacent first planetary gear 24. The second planetary gears 33 can be synchronously meshed with the second sun gear 32, and the gear ratio between the first sun gear 23 and the first planetary gear 24 of the first speed-up mechanism 20 is greater than the gear ratio between the second sun gear 32 and the second planetary gear 33 of the second speed-up mechanism 30, so that the second speed-up mechanism 30 has the effect of increasing the output speed of the transmission mechanism 10 and the first speed-up mechanism 20. The second brake assembly 35 is provided at the other end of the second shaft tube 31 and can selectively stop the rotation of the second shaft tube 31. The second brake assembly 35 of the present invention is fixed with a disc 36 at one end of the second shaft tube 31, and a stop member 37 is provided around the disc 36 for selectively stopping the rotation of the disc 36. The stop member 37 can be a clamp, an electromagnet, a brake pad, etc.

[0019] In this way, the transmission mechanism 10 can be driven to generate output, and the output speed of the transmission mechanism 10 can be increased by the first speed-up mechanism 20 or the second speed-up mechanism 30 to form a transmission structure.

[0020] When the present invention is actually operated, Figure 1 and Figure 5, for the initial gear drive, first, the first and second brake groups 25, 35 of the first and second speed-increasing mechanisms 20, 30 are released. When the driving wheel 50 drives the gear ring 18 of the transmission mechanism 10 in the reverse direction, the gear ring 18 can be driven in the forward direction and the initial planetary gears 165 of the output bracket 15 can be actuated in the forward direction. In this way, the initial sun gear 13 meshing with the initial planetary gears 165 can generate a reverse rotation force. Since the initial sun gear 13 is mounted on the fixed shaft 11 through the reverse one-way bearing 12, The initial sun gear 13 is not driven to rotate, so that the initial planetary gears 165 of the output bracket 15 can revolve clockwise relative to the initial sun gear 13, so that the output shaft tube 152 of the output bracket 15 generates output. At the same time, the first and second sun gears 23 and 32 of the first and second speed-increasing mechanisms 20 and 30 are not restricted. Therefore, the first and second sun gears 23 and 32 can be driven by the first and second planetary gears 24 and 33 on the output bracket 15, respectively, and generate idling relative to the fixed shaft 11 through the first and second shaft tubes 21 and 31, respectively.

[0021] When there is a need to change speed, such as changing from the initial gear to the first up-speed gear, refer to Figure 1 and Figure 6 , release the second brake group 35 of the second speed-up mechanism 30 so that it no longer restricts the rotation of the second shaft tube 31 of the second speed-up mechanism 30, and actuate the stop member 27 of the first brake group 25 in the first speed-up mechanism 20 to clamp the disc 26, so that the first shaft tube 21 of the first speed-up mechanism 20 is restricted from rotating, and the first shaft tube 21 and the first sun gear 23 are synchronously restricted from rotating. In this way, the first planetary gears 24 of the output bracket 15 of the first speed-up mechanism 20 can generate clockwise revolution relative to the first sun gear 23. Since the gear ratio of the first speed-up mechanism 20 is smaller than that of the transmission mechanism The gear ratio of 10 increases the output speed of the output bracket 15. At the same time, the second sun gear 32 of the second speed-up mechanism 30 is not restricted, so the second sun gear 32 can be driven by the second planetary gear 33 on the output bracket 15, and generates idling relative to the first shaft tube 21 through the second shaft tube 31. Moreover, the initial planetary gear 165 of the transmission mechanism 10 is driven by the accelerated output bracket 15, so that it also drives the relatively meshed initial sun gear 13 to accelerate, so that the initial sun gear 13 can generate reverse idling relative to the fixed shaft 11 through the one-way bearing 12 without causing interference.

[0022] When there is a need to change speed, such as changing from the initial gear or the first up-speed gear to the second up-speed gear, refer to Figure 1 and Figure 7, release the first brake group 25 of the first speed-up mechanism 20 so that it no longer restricts the rotation of the first shaft tube 21 of the first speed-up mechanism 20, and actuate the stop member 37 of the second brake group 35 in the second speed-up mechanism 30 to clamp the disc 36, so that the second shaft tube 31 of the second speed-up mechanism 30 is restricted from rotating, and the second shaft tube 31 and the second sun gear 32 are synchronously restricted from rotating. In this way, the second planetary gears 33 of the second speed-up mechanism 30 on the output bracket 15 can generate clockwise revolution relative to the second sun gear 32. Since the gear ratio of the second speed-up mechanism 30 is smaller than the gear ratio of the transmission mechanism 10 or the first speed-up mechanism 20, the output bracket 15 The output speed is improved. At the same time, the first sun gear 23 of the first speed-up mechanism 20 is not restricted. Therefore, the first sun gear 23 can be driven by the first planetary gear 24 on the output bracket 15, so that it also drives the relatively meshed first sun gear 23 to accelerate, and the first sun gear 23 is caused to produce a reverse idling effect relative to the first shaft tube 21 through the one-way bearing 22 without causing interference. Furthermore, the initial planetary gear 165 of the transmission mechanism 10 is driven by the accelerated output bracket 15, so that it also drives the relatively meshed initial sun gear 13 to accelerate, and the initial sun gear 13 is caused to produce a reverse idling effect relative to the fixed shaft 11 through the one-way bearing 12 without causing interference.

[0023] Through the foregoing design and description, the present invention utilizes the initial sun gear 13 of the transmission mechanism 10 to be mounted on the fixed shaft 11 via a one-way bearing 12, and the initial planetary gear 165 mounted on the output bracket 15 to synchronously engage the initial sun gear 13 with the gear ring 18. When the gear ring 18 is driven, speed change is achieved through the gear ratio of the gear ring 18, the initial planetary gear 165, and the initial sun gear 13. The output is then transmitted through the output bracket 15, and the first and second planetary gears 24 and 33 of the first and second speed-up mechanisms 20 and 30 are synchronously driven. The corresponding first and second sun gears 23 and 32 are selectively stopped by the respective first and second brake assemblies 25 and 35, respectively, to achieve the purpose of accelerating from the initial gear to the first or second speed-up gear. Furthermore, the present invention has the following advantages, such as:

[0024] 1. During gear shifting and speed increase, the present invention utilizes the first and second brake groups 25 and 35 to restrict the rotation of the first and second shaft tubes 21 and 31, thereby stopping their rotation relative to the first and second sun gears 23 and 32. This allows the first and second planetary gears 24 and 33 to drive the output bracket 15 in orbital rotation, increasing speed. This allows for rapid power transmission through the counterforce of the initial sun gear 13 and the first and second sun gears 23 and 32, eliminating the frictional forces that increase speed and result in power loss as in conventional systems. Consequently, the present invention improves both stability and reliability.

[0025] 2. The first and second speed-up mechanisms 20 and 30 of the present invention utilize the combination of the first and second planetary gears 24 and 33 with the corresponding first and second sun gears 23 and 32 to perform speed changes. Compared to existing clutch-type transmissions, they not only have a simpler structure and a lower failure rate, but can also effectively reduce material size and manufacturing costs.

[0026] 3. The first and second speed-increasing mechanisms 20 and 30 of the present invention rotate synchronously with the transmission mechanism 10. Therefore, when shifting gears, power can be connected immediately, the speed can be changed quickly, and there is no window period.

[0027] 4. The first and second speed-increasing mechanisms 20 and 30 of the present invention utilize first and second brake assemblies 25 and 35 to stop the rotation of the first and second sun gears 23 and 32, respectively. This eliminates the dull feeling of a conventional clutch clamping a rotating member during speed change, thereby improving the smoothness of speed change.

[0028] Reference numerals:

[0029] 10: Transmission mechanism

[0030] 11: Fixed axis

[0031] 110: convex shaft

[0032] 12: One-way bearing

[0033] 13: Initial sun gear

[0034] 15: Output bracket

[0035] 151:Front panel

[0036] 152: Output shaft tube

[0037] 155: Back plate

[0038] 156:Piercing

[0039] 158: shaft

[0040] 16: Shaft bushing

[0041] 165: Initial planetary gear

[0042] 18: Gear ring

[0043] 20: First speed-up mechanism

[0044] 21: First shaft tube

[0045] 210: convex shaft

[0046] 22: One-way bearing

[0047] 23: First sun gear

[0048] 24: First planetary gear

[0049] 25: First brake group

[0050] 26: Disc

[0051] 27: Stop piece

[0052] 30: Second speed-up mechanism

[0053] 31: Second shaft tube

[0054] 310: convex shaft

[0055] 32: Second sun gear

[0056] 33: Second planetary gear

[0057] 35: Second brake group

[0058] 36: Disc

[0059] 37: Stop piece

[0060] 50: Driving wheel

Claims

1. A transmission structure, characterized in that: Contains: A transmission mechanism, comprising a fixed shaft, an output bracket and a gear ring, wherein the fixed shaft is provided with an initial sun gear by means of a one-way bearing, and the output bracket is pivotally mounted at one end of the fixed shaft, and the output bracket has at least two shafts parallel to the fixed shaft and the outer diameter of the circle surrounded by the shafts is smaller than the inner diameter of the gear ring, and initial planetary gears corresponding to the inner edge of the gear ring are pivotally mounted on the shafts of the output bracket, and the outer edge of the gear ring is meshed with the driving wheel; At least one speed-increasing mechanism, which includes a shaft tube, a sun gear, at least two planetary gears and a brake group. The shaft tube is pivoted on the fixed shaft, and the sun gear is arranged on the shaft tube. The outer diameter of the sun gear is smaller than the initial sun gear. Each of the planetary gears is pivoted on the shaft rod of the aforementioned output bracket, and each of the planetary gears is connected to the initial planetary gear and rotates synchronously, and each of the planetary gears is synchronously meshed with the sun gear. The brake group is arranged at the other end of the shaft tube to select the driving wheel to mesh with the outer edge of the gear ring of the transmission mechanism, so that the output bracket generates output, and the shaft tube is fixed by the brake group of the speed-increasing mechanism to achieve the speed-increasing effect.

2. The transmission structure according to claim 1, wherein when there are two or more speed-up mechanisms, the outer diameters of the sun gears from the speed-up mechanisms of adjacent transmission mechanisms to the outermost speed-up mechanisms are gradually smaller, wherein the sun gears of the speed-up mechanisms other than the outermost speed-up mechanisms are disposed on the corresponding shaft tubes through one-way bearings, and the shaft tubes from the speed-up mechanisms of adjacent transmission mechanisms to the outermost speed-up mechanisms are pivotally disposed on the fixed shaft and the shaft tubes of the adjacent speed-up mechanisms in sequence.

3. The transmission structure according to claim 1, wherein the output bracket has a front plate and a rear plate, and the shaft rod is equiangularly arranged between the front and rear plates, wherein the center of the front plate has an output shaft tube corresponding to the pivot at one end of the fixed shaft, and the rear plate has a through hole for the fixed shaft and the other end of the shaft tube to pass through, and the transmission mechanism and each of the speed-up mechanisms are clamped between the front and rear plates of the output bracket.

4. The transmission structure according to claim 1 or 3, wherein a shaft bushing is pivotally mounted on each of the shaft rods of the output bracket, and the initial planetary gear of the transmission mechanism and the planetary gears of each of the speed-up mechanisms are fixedly mounted on the corresponding shaft bushings in sequence.

5. The transmission structure according to claim 1 or 3, wherein the brake assembly of the speed-up mechanism has a disc fixedly mounted on one end of each shaft tube, and a stopper is disposed around the disc to selectively stop the disc from rotating.

6. A transmission structure, characterized in that: Contains: A driving wheel, driven by a power source; A transmission mechanism, comprising a fixed shaft, an output bracket and a gear ring, wherein the fixed shaft is provided with an initial sun gear by means of a one-way bearing, and the output bracket is pivotally mounted at one end of the fixed shaft, and the output bracket has at least two shafts parallel to the fixed shaft and the outer diameter of the circle surrounded by the shafts is smaller than the inner diameter of the gear ring, and initial planetary gears corresponding to the inner edge of the gear ring are pivotally mounted on the shafts of the output bracket, and the outer edge of the gear ring is meshed with the driving wheel; A first speed-up mechanism, which includes a first shaft tube, a first sun gear, at least two first planetary gears and a first brake group. The first shaft tube is pivoted on the fixed shaft, and the first sun gear is mounted on the first shaft tube through a one-way bearing. The outer diameter of the first sun gear is smaller than the initial sun gear. Each of the first planetary gears is pivoted on the shaft of the output bracket, and each of the first planetary gears is integrally connected with the initial planetary gear and rotates synchronously. Each of the first planetary gears is synchronously meshed with the first sun gear. The first brake group is arranged at the other end of the first shaft tube to selectively stop the rotation of the first shaft tube. The second speed-up mechanism comprises a second shaft tube, a second sun gear, at least two second planetary gears and a second brake group. The second shaft tube is pivotally mounted on the first shaft tube, and the second sun gear is mounted on the second shaft tube and is different from the initial sun gear on one side. The outer diameter of the second sun gear is smaller than the first sun gear. Each of the second planetary gears is pivotally mounted on the shaft of the output bracket. Each of the second planetary gears is integrally connected with the initial planetary gear and the first planetary gear opposite thereto and rotates synchronously. Each of the second planetary gears is synchronously meshed with the second sun gear. The second brake group is mounted on the other end of the second shaft tube to selectively stop the rotation of the second shaft tube. Thereby, the driving wheel driven by the power source is engaged with the outer edge of the gear ring of the transmission mechanism, so that the output bracket generates output, and the first and second brake groups of the first and second speed-up mechanisms respectively fix the first and second shaft tubes to achieve the effect of gradual speed-up.

7. The transmission structure according to claim 6, wherein the output bracket has a front plate and a rear plate, and the shaft rod is equiangularly arranged between the front and rear plates, wherein the center of the front plate has an output shaft tube corresponding to the pivot at one end of the fixed shaft, and the rear plate has a through hole for the fixed shaft and the other end of the shaft tube to pass through, and the transmission mechanism and each of the speed-up mechanisms are clamped between the front and rear plates of the output bracket.

8. The transmission structure according to claim 6 or 7, wherein a shaft bushing is pivotally mounted on each of the shaft rods of the output bracket, and the initial planetary gear of the transmission mechanism and the first and second planetary gears of the first and second speed-up mechanisms are fixedly mounted on the relative shaft bushings in sequence.

9. The transmission structure according to claim 6, wherein the first and second brake groups of the first and second speed-up mechanisms are fixedly provided with discs at one end of the first and second shaft tubes, and stoppers are provided around the discs to selectively stop the discs from rotating.

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