Serial-type few tooth difference speed reduction transmission
阅读说明：本技术 一种串联式少齿差减速传动装置 (Serial-type few tooth difference speed reduction transmission ) 是由 张鑫珩 王逊 程寒飞 王月萍 吴天福 于 2019-08-21 设计创作，主要内容包括：本发明提供了一种串联式少齿差减速传动装置,包括箱体、设置于所述箱体内的第一少齿差齿轮传动副和第二少齿差齿轮传动副,其中,所述第一少齿差传动副包括：输入轴,与所述输入轴固定连接的偏心轴,通过轴承设置于所述偏心轴外圆周上的双联齿轮；所述双联齿轮的一面与第一内齿圈啮合、其另一面与内齿圈输出盘上的内齿圈啮合,所述双联齿轮与所述两只内齿圈啮合传动；所述内齿圈输出盘的输出轴作为所述第二少齿差齿轮传动副的输入轴,所述内齿圈输出盘的输出轴上套设有固定联接的偏心套。根据上述结构,可实现较大变速比,具有较强承载能力,并且具有较长的使用寿命。(The invention provides a tandem type small-tooth-difference speed reduction transmission device which comprises a box body, a first small-tooth-difference gear transmission pair and a second small-tooth-difference gear transmission pair, wherein the first small-tooth-difference gear transmission pair and the second small-tooth-difference gear transmission pair are arranged in the box body, and the first small-tooth-difference gear transmission pair comprises: the input shaft, the eccentric shaft fixedly connected with the input shaft, and the duplicate gear arranged on the outer circumference of the eccentric shaft through a bearing; one surface of the duplicate gear is meshed with the first inner gear ring, the other surface of the duplicate gear is meshed with the inner gear ring on the inner gear ring output disc, and the duplicate gear is in meshed transmission with the two inner gear rings; an output shaft of the inner gear ring output disc is used as an input shaft of the second small tooth difference gear transmission pair, and an eccentric sleeve fixedly connected with the output shaft of the inner gear ring output disc is sleeved on the output shaft of the inner gear ring output disc. According to the structure, a larger transmission ratio can be realized, the bearing capacity is stronger, and the service life is longer.)
1. A tandem type small tooth difference speed reduction transmission device is characterized by comprising a box body, a first small tooth difference gear transmission pair and a second small tooth difference gear transmission pair which are arranged in the box body, wherein,
the first small tooth difference transmission pair comprises: the input shaft, the eccentric shaft fixedly connected with said input shaft, set up the duplicate gear on the outer circumference of said eccentric shaft through the bearing, one side of the said duplicate gear engages with first inner gear ring, another side engages with inner gear ring on the inner gear ring output disc, the said duplicate gear engages with said two inner gear rings to transmit;
the output shaft of the inner gear ring output disc is used as an input shaft of the second small tooth difference gear transmission pair, an eccentric sleeve which is fixedly connected with the output shaft of the inner gear ring output disc is sleeved on the output shaft of the inner gear ring output disc, a bearing and an outer gear are sequentially arranged on the outer circumference of the eccentric sleeve, the second small tooth difference transmission pair further comprises a pin shaft, an output turntable and an output shaft, one end of the pin shaft is arranged on the outer gear, the other end of the pin shaft penetrates through a pin shaft hole in the output turntable, the outer gear drives the pin shaft to synchronously rotate, and the pin shaft drives the output turntable and the output shaft to.
2. The tandem type reduction transmission device with small tooth difference as claimed in claim 1, wherein the eccentric shaft is connected with the duplicate gear through a first bearing, a second bearing is arranged between the end of the shaft body of the eccentric shaft and the inner gear ring output disc, a third bearing is arranged between the inner gear ring output disc and the box body, the outer gear is mounted on the eccentric sleeve through a fourth bearing, a fifth bearing is arranged at one end of the pin shaft fixed with the outer gear, the pin shaft penetrates through the output turntable, a sixth bearing is arranged between the pin shaft and the output turntable, and a seventh bearing is arranged between the output turntable and the output disc of the inner gear ring output disc.
3. The tandem type speed reducing transmission device with few tooth differences as claimed in claim 1, wherein the first bearing, the second bearing, the fourth bearing, the fifth bearing and the seventh bearing are sliding bearings or rolling bearings.
4. The series type reduction transmission device with small tooth difference as claimed in claim 1, wherein the external gear is in mesh transmission with a second internal gear ring, the external gear rotates to drive the pin shaft to do synchronous circular oscillation and rotation movement, the pin shaft drives the output turntable to rotate, so as to realize the rotation of the output turntable and the output shaft, and the second internal gear ring and the first internal gear ring are respectively connected with the box body through fixing pieces.
5. The series type small tooth difference reduction transmission device according to claim 1, wherein the external gear is engaged with a second internal gear ring, the second internal gear ring and the first internal gear ring are respectively connected with the box body through fixing pieces, wherein when the second internal gear ring and the output shaft on the internal gear ring output disc act simultaneously, a pin fixedly connected with the external gear transmits the rotation motion of the external gear to the output turntable and the output shaft.
6. The tandem type reduction transmission device with small tooth difference as claimed in claim 4, wherein the eccentricity of the eccentric shaft is the same as or different from the eccentricity of the eccentric sleeve.
7. The tandem type speed reducing transmission device with small tooth difference as claimed in claim 1, wherein the speed reducing device comprises a plurality of pin shafts, the output turntable is provided with pin shaft holes with the same number as the pin shafts, and the pin shafts penetrate through the pin shaft holes in a one-to-one correspondence manner.
8. The series type few-tooth-difference speed reducer transmission device as claimed in claim 1, wherein, in the ring gear output disc, one or more supporting bearings are arranged between the outer circumference of the ring gear and the box body.
9. The tandem type reduction transmission with small tooth difference as claimed in claim 1, wherein said output rotary disc is formed integrally with said output shaft.
Technical Field
The invention relates to the technical field of mechanical gear reduction transmission, in particular to a serial-type small-tooth-difference reduction transmission device with a very large speed ratio.
Background
The speed reducer is generally used for transmission equipment in low rotating speed and large torque occasions, and generally consists of a single pair or a plurality of pairs of gear transmission pairs, in the transmission process, a motor, an internal combustion engine or other high-speed running power is meshed with a large gear on an output shaft through a gear with less teeth on an input shaft of the speed reducer to achieve the purpose of speed reduction, the speed reducer is positioned between a prime mover and a load, the output of the prime mover is reduced and torque is increased through speed reduction transmission, and the speed reducer is a core device widely applied in mechanical transmission.
Based on the working principle, the speed reducer has higher requirements on the rigidity, the strength and the stability of the gear pair in order to meet different transmission requirements and speed reduction requirements. In the prior art, the speed reducer can adopt various gear transmission modes and series connection among the gear transmission modes to meet the transmission requirement of a larger speed ratio. The small-tooth-difference transmission has the characteristic of remarkably improving the bearing capacity due to the fact that the number of teeth meshed simultaneously in the working process is large, and a large speed ratio is achieved.
However, in long-term practice, with the gradual increase of the speed ratio requirement, the transmission method of single-stage transmission with less tooth difference cannot meet the transmission requirement of larger speed ratio, and based on the technical problem, the prior art improves the less tooth difference and adopts two-stage or three-stage transmission with less tooth difference to be axially connected in series to meet the transmission requirement of larger speed ratio. However, after two-stage or multi-stage transmission with small tooth difference is axially connected in series, the axial and radial sizes of the equipment are remarkably increased, so that the overall weight and volume of the equipment are correspondingly and greatly increased, and the stability of the overall equipment in a transmission state is difficult to maintain due to multi-stage series connection.
In view of the above, the prior art should be improved to solve the above technical problems in the prior art.
Disclosure of Invention
The invention is made to solve the above technical problems, and an object of the invention is to provide a novel tandem type small tooth difference reduction transmission device which has a simplified structure, can reduce the whole weight of equipment, reduce the absolute volume of the equipment, improve the whole operation stability of the equipment, has strong bearing capacity, and has a long service life when meeting the reduction transmission requirement of a larger speed ratio.
In order to achieve the above object, the present invention provides a tandem type small tooth difference reduction transmission device, which includes a box, a first small tooth difference gear transmission pair and a second small tooth difference gear transmission pair disposed in the box, wherein the first small tooth difference transmission pair includes: the input shaft, the eccentric shaft fixedly connected with said input shaft, set up the duplicate gear on the outer circumference of said eccentric shaft through the bearing, one side of the said duplicate gear engages with first inner gear ring, another side engages with inner gear ring on the inner gear ring output disc, the said duplicate gear engages with said two inner gear rings to transmit; the output shaft of the inner gear ring output disc is used as an input shaft of the second small tooth difference gear transmission pair, an eccentric sleeve which is fixedly connected with the output shaft of the inner gear ring output disc is sleeved on the output shaft of the inner gear ring output disc, a bearing and an outer gear are sequentially arranged on the outer circumference of the eccentric sleeve, the second small tooth difference transmission pair further comprises a pin shaft, an output turntable and an output shaft, one end of the pin shaft is arranged on the outer gear, the other end of the pin shaft penetrates through a pin shaft hole in the output turntable, the outer gear drives the pin shaft to synchronously rotate, and the pin shaft drives the output turntable and the output shaft to.
Preferably, the eccentric shaft and the duplicate gear may be connected by a first bearing, a second bearing is disposed between a shaft body end of the eccentric shaft and the inner gear ring output disc, a third bearing is disposed between the inner gear ring output disc and the case, the outer gear is mounted on the eccentric sleeve by a fourth bearing, a fifth bearing is disposed at one end of the pin shaft fixed to the outer gear, the pin shaft passes through the output turntable, a sixth bearing is disposed between the pin shaft and the output turntable, and a seventh bearing is disposed between the output turntable and the output disc of the inner gear ring output disc.
Still preferably, the first bearing, the second bearing, the fourth bearing, the fifth bearing and the seventh bearing may be sliding bearings or rolling bearings.
Preferably, the external gear is in meshing transmission with the second inner gear ring, the external gear drives the pin shaft to perform synchronous circular swinging and rotary motion, the pin shaft drives the output turntable to rotate, so that the output turntable and the output shaft rotate, and the second inner gear ring and the first inner gear ring are respectively connected with the box body through fixing pieces.
Preferably, the external gear can be engaged with a second internal gear ring, the second internal gear ring and the first internal gear ring are respectively connected with the box body through fixing pieces, and when the second internal gear ring and an output shaft on the internal gear ring output disc act simultaneously, a pin fixedly connected with the external gear transmits the rotation motion of the external gear to the output turntable and the output shaft.
Further preferably, the eccentricity of the eccentric shaft is the same as or different from the eccentricity of the eccentric sleeve.
Preferably, the speed reducer may include a plurality of pin shafts, the output turntable is provided with pin shaft holes having the same number as the pin shafts, and the pin shafts penetrate through the pin shaft holes in a one-to-one correspondence manner.
Preferably, in the inner gear ring output disc, a plurality of support bearings are arranged between the outer circumference of the inner gear ring and the box body.
Preferably, the output dial may be integrally formed with the output shaft.
According to the above description and practice, the serial small tooth difference reduction transmission device of the invention is provided with the first small tooth difference transmission pair and the second small tooth difference transmission pair which are connected in series, wherein the first small tooth difference transmission pair comprises the duplicate gear, and the first inner gear ring and the inner gear ring output disc which are respectively meshed with the duplicate gear, so that the first-stage large-speed-ratio reduction is realized through the meshing transmission of the duplicate gear, the first inner gear ring and the inner gear ring output disc; then, an output shaft of the inner gear ring output disc is used as an input shaft of a second small gear difference transmission pair, an eccentric sleeve is arranged in the second small gear difference transmission pair, the eccentric sleeve is fixedly sleeved on the output shaft of the inner gear ring output disc, an outer gear is arranged on the eccentric sleeve, a pin shaft fixedly connected with the outer gear penetrates through a pin shaft hole of the output turntable, when the outer gear is meshed with a second inner gear ring fixedly connected with the box body, the second inner gear ring and the output shaft on the inner gear ring output disc act simultaneously, so that the outer gear does circular oscillation motion and low-speed rotation motion at the same time, and the pin shaft and the outer gear do synchronous low-speed rotation motion, thereby driving the output turntable and the output shaft to do synchronous rotation motion, and realizing second-stage large-speed-ratio. In summary, in the tandem type small tooth difference reduction transmission device, the first inner gear ring fixedly connected with the box body is arranged to be in meshing transmission with the duplicate gear, so that the first-stage large speed ratio reduction is realized, and the second-stage large speed ratio reduction is realized through the outer gear, the pin shaft, the second inner gear ring, the transmission output turntable and the output shaft. When the output shaft provides power, the device becomes a speed increasing mechanism with a larger speed ratio.
Drawings
FIG. 1 is a cross-sectional view showing a cross-sectional structure of a tandem type reduction gear with small tooth difference according to an embodiment of the present invention;
fig. 2 is a sectional view showing a sectional structure of a bearing on an output turntable and a pin bearing in the tandem type small tooth difference reduction transmission device shown in fig. 1.
Detailed Description
An embodiment of a tandem type small tooth difference reduction transmission device according to the present invention will be described with reference to the accompanying drawings. Those of ordinary skill in the art will recognize that the described embodiments can be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims. Furthermore, in the present description, the drawings are not to scale and like reference numerals refer to like parts.
Fig. 1 is a schematic diagram showing the structure of a tandem type reduction transmission device with less tooth difference according to an embodiment of the invention. Fig. 2 is a schematic view showing the structure of the bearing on the output turntable and the pin shaft supporting bearing in the tandem type small tooth difference reduction transmission device shown in fig. 1. As shown in fig. 1 and fig. 2, the tandem type small tooth difference reduction transmission device according to the embodiment of the present invention includes a
Taking the input shaft input of the first small tooth difference gear transmission pair and the output shaft output of the second small tooth difference gear transmission pair as an example, the first small tooth difference gear transmission pair comprises an
The
In this embodiment of the present invention, the first bearing 6, the second bearing 7, the fourth bearing 14, the fifth bearing 15, and the seventh bearing 18, which are described above, may be sliding bearings or rolling bearings. In other embodiments of the present invention, the first bearing 6, the second bearing 7, the fourth bearing 14, the fifth bearing 15, and the seventh bearing 18 may also be used in a form in which a plurality of pairs of bearings are used in series.
Referring to fig. 2, a plurality of
According to the above description and practice, the serial small tooth difference reduction transmission device of the invention is provided with the first small tooth difference transmission pair and the second small tooth difference transmission pair which are connected in series, wherein the first small tooth difference transmission pair comprises the duplicate gear, and the first inner gear ring and the inner gear ring output disc which are respectively meshed with the duplicate gear, so that the first-stage large-speed-ratio reduction is realized through the meshing transmission of the duplicate gear, the first inner gear ring and the inner gear ring output disc; then, an output shaft of the inner gear ring output disc is used as an input shaft of a second small gear difference transmission pair, an eccentric sleeve is arranged in the second small gear difference transmission pair, the eccentric sleeve is fixedly sleeved on the output shaft of the inner gear ring output disc, an outer gear is arranged on the eccentric sleeve, a pin shaft fixedly connected with the outer gear penetrates through a pin shaft hole of the output turntable, when the outer gear is meshed with a second inner gear ring fixedly connected with the box body, the second inner gear ring and the output shaft on the inner gear ring output disc act simultaneously, so that the outer gear does circular oscillation motion and low-speed rotation motion at the same time, and the pin shaft and the outer gear do synchronous low-speed rotation motion, thereby driving the output turntable and the output shaft to do synchronous rotation motion, and realizing second-stage large-speed-ratio. In summary, in the tandem type small tooth difference reduction transmission device, the first inner gear ring fixedly connected with the box body is arranged to be in meshing transmission with the duplicate gear, so that the first-stage large speed ratio reduction is realized, and the second-stage large speed ratio reduction is realized through the outer gear, the pin shaft, the second inner gear ring, the transmission output turntable and the output shaft. When the output shaft provides power, the device becomes a speed increasing mechanism with a larger speed ratio.
The tandem type small tooth difference reduction transmission device according to the invention is described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the tandem type reduction transmission with less tooth difference proposed by the present invention without departing from the scope of the present invention. Therefore, the scope of the present invention should be determined by the contents of the appended claims.
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