CN112901726A - Speed-increasing and torque-increasing transmission mechanism - Google Patents
Speed-increasing and torque-increasing transmission mechanism Download PDFInfo
- Publication number
- CN112901726A CN112901726A CN202110069076.XA CN202110069076A CN112901726A CN 112901726 A CN112901726 A CN 112901726A CN 202110069076 A CN202110069076 A CN 202110069076A CN 112901726 A CN112901726 A CN 112901726A
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- planetary gear
- primary
- gear set
- increasing
- stage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/082—Planet carriers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H2057/085—Bearings for orbital gears
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
The invention provides a speed-increasing and torque-increasing transmission mechanism, which adopts a two-stage planetary gear transmission system, wherein the two-stage planetary gear transmission system comprises a first-stage planetary gear set and a second-stage planetary gear set, the first-stage planetary gear set and the second-stage planetary gear set are arranged on the same straight line and are used for speed increasing; the primary planet gear of the primary planetary gear set and the secondary planet gear of the secondary planetary gear set share a common planet carrier, and the common planet carrier floats; a first-stage sun gear of the first-stage planetary gear set is fixed, a first-stage inner gear ring is used as an input element, and a common planet carrier is used as an output element; and a secondary sun gear and a common planet carrier of the secondary planetary gear set are simultaneously used as input elements, and a secondary ring gear is used as an output element. The invention has simple structure and low cost, and can realize the purposes of increasing speed and torque.
Description
Technical Field
The invention relates to the technical field of mechanical transmission, in particular to a speed-increasing and torque-increasing transmission mechanism.
Background
The mechanical transmission mechanism can change the motion mode, direction or speed provided by power, and is purposefully utilized by people. The transmission modes can be divided into mechanical transmission, fluid transmission, electric transmission and composite transmission according to different working principles.
The torque-increasing speed-reducing transmission mechanism plays a role in matching rotating speed and transmitting torque between a prime motor and an actuating mechanism, and is widely applied to modern machinery. The existing torque-increasing speed-reducing transmission mechanism is commonly provided with a parallel shaft transmission mechanism and a planetary transmission mechanism, wherein a planet carrier of the planetary transmission mechanism is generally a double-wall type planet carrier or a single-wall type planet carrier. The double-arm planet carrier has good rigidity, a complex structure and larger integral size. The single-wall type planet carrier is simple in structure and small in overall size, but because the planet wheel mandrel is in a cantilever state, the stress is not good, and the gear meshing is greatly influenced.
In the prior art, for example, the torque is increased by reducing the rotating speed of the two torque-increasing and speed-reducing transmission mechanisms, and the problem of reducing the rotating speed is inevitably brought while the torque is increased, so that the working efficiency is affected. If the prime mover is ensured to obtain larger torque at the same rotating speed, the power selection of the prime mover needs to be increased, so that the production cost is greatly increased.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a low-cost speed-increasing and torque-increasing transmission mechanism to increase torque and ensure rotation speed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a speed-increasing and torque-increasing transmission mechanism which is simple in structure and low in cost and can achieve the purpose of speed increasing and torque increasing.
In order to achieve the purpose, the invention provides a speed-increasing and torque-increasing transmission mechanism, which adopts a two-stage planetary gear transmission system, wherein the two-stage planetary gear transmission system comprises a first-stage planetary gear set and a second-stage planetary gear set, the first-stage planetary gear set and the second-stage planetary gear set are arranged on the same straight line and are used for speed increasing;
the primary planetary gear set comprises a primary sun gear, a primary planet gear, a primary annular gear and a common planet carrier which are meshed with each other; the secondary planetary gear set comprises a secondary sun gear, a secondary planet gear, a secondary annular gear and a common planet carrier which are meshed with each other; the primary planet gear of the primary planetary gear set and the secondary planet gear of the secondary planetary gear set share a common planet carrier, and the common planet carrier floats;
a first-stage sun gear of the first-stage planetary gear set is fixed, a first-stage inner gear ring is used as an input element, and a common planet carrier is used as an output element; and a secondary sun gear and a common planet carrier of the secondary planetary gear set are simultaneously used as input elements, and a secondary ring gear is used as an output element.
Preferably, the device also comprises a rotating speed driving motor and a torque driving motor;
the rotating speed driving motor is in transmission connection with a primary inner gear ring of the primary planetary gear set; and the torque driving motor is in transmission connection with a secondary sun gear of the secondary planetary gear set.
Preferably, the primary sun gear of the primary planetary gear set is coaxial with the secondary sun gear of the secondary planetary gear set; wherein,
the first-stage sun gear adopts a sun gear hollow shaft, and one side of the second-stage sun gear, which is opposite to the first-stage sun gear, extends into an inner hole of the first-stage sun gear hollow shaft.
Preferably, the primary planet gear of the primary planetary gear set is rotatably sleeved on the common planet carrier through a sliding bearing; and a secondary planet wheel of the secondary planetary gear set is rotatably sleeved on the common planet carrier through a sliding bearing.
Preferably, the common planet carrier comprises a first plate, a second plate and a third plate which are positioned on the same straight line and are parallel to each other;
two ends of a primary planet shaft of the primary planetary gear set are fixed on a first plate and a second plate of a common planet carrier, and a primary planet gear is rotatably arranged on the primary planet shaft through a sliding bearing;
two ends of a secondary planet shaft of the secondary planetary gear set are fixed on a second plate and a third plate of the common planet carrier, and the secondary planet gear is rotatably arranged on the secondary planet shaft through a sliding bearing.
Preferably, the first plate, the second plate and the third plate are of split structures and are respectively and independently ground into finished products and then assembled and processed pairwise.
The invention has the following beneficial effects:
when the speed-increasing and torque-increasing transmission mechanism provided by the invention is used for transmitting the rotating speed and the torque, the primary sun gear of the primary planetary gear set is fixed, the primary annular gear is connected with the rotating speed driving motor to be used as a driving wheel, the primary planetary gear drives the common planet carrier to be used as a driven wheel, and the common planet carrier is used as an output element for transmitting the rotating speed. Because the secondary planet gears of the secondary planetary gear set share a common planet carrier with the primary planet gears of the primary planetary gear set, the common planet carrier serves as the output element of the primary planetary gear set and also serves as the input element of the secondary planetary gear set. A secondary sun gear of the secondary planetary gear set is connected with the torque driving motor to serve as a driving wheel, and the secondary planet gear drives a secondary inner gear ring to serve as a driven wheel. In the secondary planetary gear set, a secondary sun gear and a common planet carrier are simultaneously used as input elements, and a secondary ring gear is used as an output element to achieve the purposes of increasing speed and increasing torque under the combined action of two rotations.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic structural view of a speed-increasing and torque-increasing transmission mechanism according to an embodiment of the present invention;
fig. 2 is a schematic view of an assembly structure of a primary planet shaft and a sliding bearing according to an embodiment of the present invention.
Reference numerals
1-first-stage sun gear; 2-first order planet shaft; 3-a primary planet wheel; 4-primary annular gear; 5-a secondary sun gear; 6-secondary annular gear; 7-a secondary planet shaft; 8-secondary planet wheels; 9-a box body; 10-plate one; 11-a screw; 12-plate two; 13-plate three; 14-a planet carrier; a 15-alloy layer; 16-oil inlet holes; 17-sliding bearing.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more clearly understood, the following further detailed description of the embodiments of the present application with reference to the drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not an exhaustive list of all the embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 1, the speed-increasing and torque-increasing transmission mechanism includes a two-stage planetary gear transmission system in a box 9, and the two-stage planetary gear transmission system includes a first-stage planetary gear set for speed increasing and a second-stage planetary gear set for torque increasing, which are arranged on the same straight line. Wherein the primary planetary gear set comprises a primary sun gear 1, a primary planet gear 3, a primary ring gear 4 and a common planet carrier 14 which are meshed with each other. The secondary planetary gear set includes a secondary sun gear 5, a secondary planet gear 8, a secondary ring gear 6, and a common carrier 14, which mesh with each other. The primary planet wheels 3 of the primary planetary gear set and the secondary planet wheels 8 of the secondary planetary gear set share a common planet carrier 14, and the common planet carrier 14 floats.
The speed-increasing and torque-increasing transmission mechanism provided by the invention adopts double drives, and a rotating speed drive motor and a torque drive motor can be adopted for driving in a specific embodiment. The rotating speed driving motor is in transmission connection with a primary inner gear ring 4 of the primary planetary gear set, and the torque driving motor is in transmission connection with a secondary sun gear 5 of the secondary planetary gear set.
Specifically, when the speed-increasing and torque-increasing transmission mechanism provided by the invention is used for transmitting the rotating speed and the torque, the primary sun gear 1 of the primary planetary gear set is fixed, the primary annular gear 4 is connected with a rotating speed driving motor to be used as a driving wheel, the primary planetary gear 3 drives the common planet carrier 14 to rotate to be used as a driven wheel, and the common planet carrier 14 is used as an output element for transmitting the rotating speed. Since the secondary planet gears 8 of the secondary planetary gear set share a common planet carrier 14 with the primary planet gears 3 of the primary planetary gear set, the common planet carrier 14 serves as both the output member and the input member of the secondary planetary gear set.
In the secondary planetary gear set, a secondary sun gear 5 is connected with a torque driving motor to serve as a driving wheel, and a secondary planet gear 8 drives a secondary inner gear ring 6 to rotate to serve as a driven wheel. In the secondary planetary gear set, a secondary sun gear 5 and a common planet carrier 14 are simultaneously used as input elements, and a secondary ring gear 6 is used as a final output element to realize speed increasing and torque increasing under the combined action of two rotations.
Referring to fig. 1, in the secondary planetary gear set, the secondary sun gear 5 is used as an input element, and the secondary ring gear 6 is used as an output element, so as to form a transmission reduction ratio i 2. The secondary sun gear 5 is in transmission connection with a torque driving motor as input, the input torque is M2, the rotating speed is V2, and the torque is transmitted to the secondary inner gear ring 6 through the secondary planet gear 8. The output torque M of the two-stage ring gear 6 is M2 × i2, and the output speed V' is V2/i 2.
In the primary planetary gear set, a primary sun gear 1 is fixed, a primary ring gear 4 serves as an input element, a common planet carrier 14 serves as an output element, and the transmission reduction ratio is i 1. The common planet carrier 14 is simultaneously used as an input element of the secondary planetary gear set, the output is the secondary ring gear 6, and the secondary planetary gear set forms a speed increasing transmission ratio i 3. The primary annular gear 4 is connected with a rotating speed driving motor as input, the input torque is M1, the rotating speed is V1, the rotating speed is transmitted to the common planet carrier 14 through the primary planet gear 3 and then transmitted to the secondary annular gear 6. The output speed V ″, of the two-stage ring gear 6 is V1/i1 × i 3. The rotating speed driving motor can rotate only by overcoming internal friction, the required torque is extremely small, and a small motor can be selected, so that the production cost is greatly saved.
Through the above transmission, the torque M obtained when the two-stage ring gear 6 outputs is M2 i2, and the total rotational speed V' + V ═ V2/i2+ V1/i1 i 3. According to the embodiment, the double-drive planetary gear transmission system has the advantages that double drives are adopted, the purpose of increasing speed and torque is achieved through the two-stage planetary gear transmission system, the motor is small in model selection, and the production cost is greatly saved. It will be appreciated that the direction of rotation of common carrier 14 of the first stage planetary gear set and the direction of rotation of common carrier 14 of the second stage planetary gear set should always be the same for speed and torque increasing purposes.
Referring to fig. 1, in order to ensure better load balancing effect, the common planet carrier 14 is designed to be floating. Thus, the common planet carrier 14 floats without support, and a better load balancing effect can be achieved.
In order to ensure that the primary sun wheel 1 and the secondary sun wheel 5 can be meshed with the primary planet wheel 3 and the secondary planet wheel 8 simultaneously and respectively, the primary sun wheel 1 and the secondary sun wheel 5 are coaxially arranged, wherein the primary sun wheel 1 adopts a sun wheel hollow shaft, and one side of the secondary sun wheel 5, which is opposite to the primary sun wheel 1, extends into an inner hole of the primary sun wheel hollow shaft. Through the arrangement, the secondary sun gear 5 extends into the inner hole of the primary sun gear hollow shaft when being installed, the secondary sun gear 5 and the primary sun gear 1 are ensured to be located on the same axis, and the secondary sun gear 5 and the secondary planet gear 8 can be effectively meshed while the primary sun gear 1 and the primary planet gear 3 are ensured to be meshed.
Traditional planetary gear set often adopts antifriction bearing to support, because antifriction bearing is an subassembly, its radial direction has certain thickness, must increase the planet wheel size in order to satisfy intensity to lead to planet carrier lectotype to increase, and then lead to whole planetary gear set size increase, finally lead to whole planetary gear set's spatial arrangement to receive the restriction.
In order to reduce the radial size of the primary planetary gear set and the secondary planetary gear set, the primary planet wheel 3 and the secondary planet wheel 8 are supported by sliding bearings. Specifically, the common planet carrier 14 includes a first plate 10, a second plate 12, and a third plate 13 which are located on the same straight line and are parallel to each other, two ends of the primary planet shaft 2 are fixed on the first plate 10 and the second plate 12, and the primary planet wheel 3 is rotatably mounted on the primary planet shaft 2 through a sliding bearing. Two ends of the secondary planet shaft 7 are fixed on the second plate 12 and the third plate 13, and the secondary planet wheel 8 is rotatably arranged on the secondary planet shaft 7 through a sliding bearing.
With the above arrangement, the planet wheel is supported by the sliding bearing, so that the radial dimension of the planetary gear set can be reduced to overcome the space limitation. The first-stage planet gear is supported by a sliding bearing as an example. Referring to fig. 2, both ends of the primary planetary shaft 2 are fixed to the first plate 10 and the second plate 12 of the common planet carrier 14, and the primary planetary gear 3 is rotatably mounted on the primary planetary shaft 2 through a sliding bearing 17. Only need design reasonable clearance between one-level planet axle 2 and one-level planet wheel 3, one-level planet axle 2 surface is pour one deck special alloy material and is formed alloy-layer 15, can bear certain specific pressure and rotation speed promptly to satisfy the operation requirement, greatly reduced one-level planet wheel 3's radial dimension, thereby reduce whole one-level planetary gear set's radial dimension. In order to ensure the lubrication between the first-stage planet wheel 3 and the first-stage planet shaft 2, the first-stage planet shaft 2 is provided with an oil inlet hole 16, so that lubricating oil can flow between the first-stage planet wheel 3 and the first-stage planet shaft 2, and an oil film with a certain thickness is formed between the first-stage planet wheel 3 and the first-stage planet shaft 2, thereby ensuring the lubrication effect.
In the invention, in order to ensure the machining precision of the common planet carrier 14, the first plate 10, the second plate 12 and the third plate 13 of the common planet carrier 14 are in a split structure, wherein the first plate 10 and the second plate 12 and the third plate 13 can be fixedly connected through the screws 11. Through the arrangement, the first plate 10, the second plate 12 and the third plate 13 are independent parts, grinding can be independently carried out, and two-two assembling machining is carried out after grinding finished products, so that the first-stage planet wheel 3 and the second-stage planet wheel 8 can be normally installed at the same time. Compared with the traditional double-arm type planet carrier and the single-wall type planet carrier, the latter can only carry out boring processing, and the processing precision is greatly lower than that of the common planet carrier 14 disclosed by the invention.
In addition, if the speed-increasing and torque-increasing transmission mechanism provided by the invention adopts the traditional double-arm type or/and single-wall type planet carrier, the use requirement can be met only by connecting two independent planet carriers into a whole. Compared with the two traditional planet carriers, the common planet carrier 14 of the invention has smaller axial size, and further overcomes the space limitation of a transmission mechanism.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (6)
1. The speed-increasing and torque-increasing transmission mechanism is characterized in that the transmission mechanism adopts a two-stage planetary gear transmission system, and the two-stage planetary gear transmission system comprises a first-stage planetary gear set and a second-stage planetary gear set which are arranged on the same straight line and used for increasing speed and torque;
the primary planetary gear set comprises a primary sun gear, a primary planet gear, a primary annular gear and a common planet carrier which are meshed with each other; the secondary planetary gear set comprises a secondary sun gear, a secondary planet gear, a secondary annular gear and a common planet carrier which are meshed with each other; the primary planet gear of the primary planetary gear set and the secondary planet gear of the secondary planetary gear set share a common planet carrier, and the common planet carrier floats;
a first-stage sun gear of the first-stage planetary gear set is fixed, a first-stage inner gear ring is used as an input element, and a common planet carrier is used as an output element; and a secondary sun gear and a common planet carrier of the secondary planetary gear set are simultaneously used as input elements, and a secondary ring gear is used as an output element.
2. The speed-increasing and torque-increasing transmission mechanism according to claim 1, characterized in that: the device also comprises a rotating speed driving motor and a torque driving motor;
the rotating speed driving motor is in transmission connection with a primary inner gear ring of the primary planetary gear set; and the torque driving motor is in transmission connection with a secondary sun gear of the secondary planetary gear set.
3. The speed-increasing and torque-increasing transmission mechanism according to claim 2, characterized in that: the primary sun gear of the primary planetary gear set is coaxial with the secondary sun gear of the secondary planetary gear set; wherein,
the first-stage sun gear adopts a sun gear hollow shaft, and one side of the second-stage sun gear, which is opposite to the first-stage sun gear, extends into an inner hole of the first-stage sun gear hollow shaft.
4. An acceleration and torque multiplication transmission according to any of claims 1 to 3, characterized in that: the first-stage planet gear of the first-stage planetary gear set is rotatably sleeved on the common planet carrier through a sliding bearing; and a secondary planet wheel of the secondary planetary gear set is rotatably sleeved on the common planet carrier through a sliding bearing.
5. The speed-increasing and torque-increasing transmission mechanism according to claim 4, wherein: the common planet carrier comprises a first plate, a second plate and a third plate which are positioned on the same straight line and are parallel to each other;
two ends of a primary planet shaft of the primary planetary gear set are fixed on a first plate and a second plate of a common planet carrier, and a primary planet gear is rotatably arranged on the primary planet shaft through a sliding bearing;
two ends of a secondary planet shaft of the secondary planetary gear set are fixed on a second plate and a third plate of the common planet carrier, and the secondary planet gear is rotatably arranged on the secondary planet shaft through a sliding bearing.
6. The speed-increasing and torque-increasing transmission mechanism according to claim 5, wherein: the first plate, the second plate and the third plate are of split structures and are respectively and independently ground into finished products and then assembled and processed pairwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110069076.XA CN112901726A (en) | 2021-01-19 | 2021-01-19 | Speed-increasing and torque-increasing transmission mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110069076.XA CN112901726A (en) | 2021-01-19 | 2021-01-19 | Speed-increasing and torque-increasing transmission mechanism |
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| CN112901726A true CN112901726A (en) | 2021-06-04 |
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| CN202110069076.XA Pending CN112901726A (en) | 2021-01-19 | 2021-01-19 | Speed-increasing and torque-increasing transmission mechanism |
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Application publication date: 20210604 |