JP3607877B2 - Synchronous transmission gear unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synchronous transmission gear device that distributes rotational power of a single shaft to a plurality of shafts and performs synchronous transmission at a predetermined speed ratio.
[0002]
[Prior art]
Conventionally, as a synchronous transmission gear device that distributes high-speed rotational power such as a motor shaft to a plurality of output shafts, decelerates, and synchronously transmits at a predetermined speed ratio, as shown in FIG. First, a structure is generally used in which the gear is decelerated using a gear reduction mechanism G, and then the reduced power is transmitted to a plurality of output shafts j and j via a gear distribution transmission mechanism B.
[0003]
[Problems to be solved by the invention]
In the prior art, the gear distribution transmission mechanism distributes a plurality of low-speed, high-torque rotational powers that are decelerated by the gear reduction mechanism, so that a cylindrical gear or a bevel gear that is an element of the gear distribution transmission mechanism 2 is used. Alternatively, a transmission gear such as a worm gear is increased in size and weight so that it can withstand high torque, and as a result, the gear distribution transmission mechanism tends to increase in size and weight.
[0004]
Further, in order to change the synchronous speed among the plurality of output shafts, it is necessary to change the above-described elements in the gear distribution transmission mechanism that performs high torque transmission, so that the change of the transmission gear becomes significant. In other words, the conventional synchronous transmission gear device is likely to be large as a whole device, and it is difficult to easily change the synchronous speed, leaving room for improvement in terms of the size and flexibility of the device. It seemed to be.
[0005]
In view of the above situation, an object of the present invention is to provide a synchronous transmission gear device that has the advantage that it can be made compact by devising the transmission structure, or the synchronous speed can be changed by small-scale component changes. is there.
[0006]
[Means for Solving the Problems]
The configuration of claim 1, the synchronous transmission gear device provided with a dispensing transmission means a tell by distributing the rotational power of the input shaft 1 to the intermediate rotor 2 multiple parallel of each other, the plurality of intermediate rotor every 2 to, and decelerates the rotational power of the intermediate rotary member 2 is provided with a planetary gear mechanism b for transmitting the output shaft 3 having the same axis as the axis of the intermediate rotor 2, the distributing transmission means a, a plurality of said intermediate rotary member 2 interlocked freely plurality of driving-side rotator 2a thereof to the intermediate rotating body 2 so as to correspond to each, and the transfer case 8 for covering the distributor transmission means a, the planetary gear mechanism b And the deceleration case 11 covering the upper and lower cases 2 and 11 are configured to be separable and joinable, and the intermediate rotating body 2 and the driving-side rotating body 2a corresponding to each other are interlocked and connected with the joining of the two cases 8 and 11. , said both cases 8,1 Of with the separation Yes constitutes a state in which interlocking connection is released between the intermediate rotary member 2 and the driving-side rotator 2a, the transmission case 11 is provided for each of the plurality of planetary gear mechanisms b, The plurality of deceleration cases 11 are connected and integrated with a common mounting frame 23, and the distribution case 8 is configured to be separable and joinable to the plurality of reduction cases 11. .
According to the first aspect of the present invention, the rotational power is first distributed to the plurality of intermediate rotating bodies and then decelerated by the planetary gear mechanism. Therefore, the distributing transmission means only needs to transmit high-speed and low-torque rotation. Thus, the components that are elements in the distribution transmission means such as gears and chains can be small or small-sized to withstand low torque. Since the rotational power of the intermediate rotating body is decelerated by the planetary gear mechanism and output to the output shaft coaxial with the intermediate rotating body, the intermediate rotating body, the planetary gear mechanism, and the output shaft are arranged in a straight line. The arrangement of the plurality of output shafts and the arrangement of the intermediate rotator in the distribution transmission means can be made into a single layout. In addition, the planetary gear mechanism may be a general one that decelerates the rotational power of high speed and low torque to low speed and high torque, and is not enlarged by providing the distribution transmission means first. Compared to a conventional synchronous transmission gear device that adopts a structure for distributing, the size of the entire device can be made compact as much as the distribution transmission means can be reduced in size.
According to the first aspect of the present invention, the distribution case surrounding the distribution transmission means and the speed reduction case surrounding the planetary gear mechanism can be freely attached and detached, and both cases can be separated as necessary. Therefore, it becomes easier to perform maintenance such as inspection and maintenance inside the case as compared with the case where both the cases are integrated. In addition, it is possible to conveniently change the specifications of the distribution transmission means and the planetary gear mechanism with both cases separated, and each case, distribution transmission means or planetary gear mechanism is replaced with another one. For example, flexibility is easily applied to the configuration.
[0007]
According to a second aspect of the present invention, in the configuration of the first aspect, the plurality of planetary gear mechanisms are relatively arranged so as to be displaced from each other in the axial direction of the intermediate rotating body.
According to the configuration of claim 2, the planetary gear mechanisms configured in a circular shape centering on the axis of the sun gear are displaced relative to each other in the axial direction of the intermediate rotating body, so that the planetary gears are arranged. In the planetary gear mechanism such as a ring gear that is inscribed in mesh with each other, the axial positions of the intermediate rotating bodies of the parts that define the maximum diameter of the planetary gear mechanisms do not coincide with each other, and the adjacent planetary gear mechanisms are connected to the axis of the sun gear. It is possible to make it closer in the direction of connecting each other. Therefore, compared to the case where the axial direction positions of the intermediate rotating bodies between adjacent planetary gear mechanisms coincide with each other, the inter-axis distance at the time of adjacent output can be made closer, and the device can be downsized. Become.
[0009]
According to a third aspect of the present invention, in the configuration of the first or second aspect , the intermediate rotating body is configured as a passive-side intermediate shaft, and the driving-side rotating body is configured as a driving-side intermediate shaft. The distribution case and the speed reduction case can be freely separated and joined by movement in the axial direction. According to the configuration of claim 3 , the distribution transmission means and the planetary gear mechanism can be distinguished into a transmission state and a transmission cut-off state by connecting and releasing the shafts, and by moving the intermediate rotating body in the axial direction. Since the two cases can be separated and joined together, the transmission is automatically cut off according to the separation of the distribution case and the deceleration case, and the transmission state is automatically established according to the joining of the two cases. That is, the transmission release and the transmission connection between the distribution transmission means and the planetary gear mechanism can be performed only by separating and joining the two cases.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a development view showing the structure of the synchronous transmission gear device, and FIG. 2 is a front view of the reduction case. In this synchronous transmission gear device A, the high-speed rotational power of the input shaft 1 linked to a drive source such as an electric motor or an engine is transferred to the two intermediate shafts 2 and 2 by a distribution transmission means a at a predetermined speed ratio (here Then, after being distributed to 1: 1), the two-stage planetary gear mechanism b having the same speed ratio is decelerated and transmitted to the output shafts 3 and 3.
[0012]
The distribution transmission means a includes an input shaft 1 to which rotational power is input via an endless rotation band 4 such as a chain or a belt, two drive side intermediate shafts (an example of a drive side rotating body) 2a and 2a, A gear transmission comprising an input spur gear 5 mounted on the input shaft 1, passive spur gears 6, 6 mounted on each drive side intermediate shaft 2 a, and one intermediate spur gear 7 in a distribution case 8. The mechanism is configured. The input spur gear 5 is directly meshed with one passive spur gear 6 and is meshed with the other passive spur gear 6 via an intermediate spur gear 7, and the two drive-side intermediate shafts 2a and 2a are They are configured to rotate at the same speed and in opposite directions.
[0013]
The planetary gear mechanism b is provided independently for each intermediate shaft 2, and each is configured such that a first planetary speed reduction mechanism 9 and a second planetary speed reduction mechanism 10 are housed in a speed reduction case 11. The first planetary speed reduction mechanism 9 is supported by a drive-side intermediate shaft 2a and a passive-side intermediate shaft (an example of an intermediate rotator) 2b that is interlocked and connected to the drive-side intermediate shaft 2a via a spline boss 12. A plurality of first planetary gears 15 meshing with both the first ring gear 13 and the first input gear (sun gear) 14 and the first ring gear 13 provided on the passive intermediate shaft 2b. And a first carrier 16 that rotatably supports the first planetary gear 15.
[0014]
The second planetary speed reduction mechanism 10 includes a second input shaft 17 that is linked to the first carrier 16, a second ring gear 18 that also serves as a part of the speed reduction case 11, and a second input gear 17 that is provided on the second input shaft 17. A plurality of second planetary gears 20 meshing with both the input gear (sun gear) 19 and the second ring gear 18, and a second carrier 21 that rotatably supports the plurality of second planetary gears 20. ing. And it is comprised so that the rotational power of the 2nd carrier 21 may be transmitted to the large diameter output shaft 3 by a spline fitting structure.
[0015]
The axis P of the intermediate shaft 2 composed of the drive-side intermediate shaft 2a and the passive-side intermediate shaft 2b is the axis of the output shaft 3, and the two output shafts 3, 3 parallel to each other are decelerated so as to rotate reversely to each other. The constant speed rotational power can be taken out.
[0016]
The speed reduction case 11 has a circular shape when viewed from the axial direction of the intermediate shaft 2, and is composed of three parts including an input side case portion 11a, an output side case portion 11b, and a second ring gear 18 interposed therebetween. Has been. An attachment frame 23 that fixes and couples the two sets of speed reduction cases 11 and 11 is provided. By fixing the attachment frame 23 with a bolt or the like, the synchronous transmission gear device A is fixed to a device fixing portion (not shown). ) And can be arranged.
[0017]
The mounting frame 23 is formed of a pedestal 23a, a mounting plate portion 23b, and a peripheral plate portion 23c, and uses connection bolts 22 that integrate the input / output case portions 11a and 11b and the second ring gear 18 together. Thus, the two sets of deceleration cases 11 and 11 are coupled together by fastening. That is, the two deceleration cases 11, 11 are integrated by being connected using the attachment frame 23.
[0018]
The distribution case 8 and the speed reduction case 11 in a state where one input shaft 1 on the input side and two drive side intermediate shafts 2a and 2a project on the output side are the axis of the intermediate shaft 2. Separation and joining are possible by relative movement in the P direction, and the distribution cases 8 and 2 are connected by bolting the output side flange 8f of the distribution case 8 and the input side flange 11f which is the flange of the input side case portion 11a. The pair of deceleration cases 11 and 11 are integrated.
[0019]
That is, if the distribution case 8 and the deceleration case 11 are moved relatively close to each other along the axis P by operating the mounting bolt 24, the spline boss 12 and the drive side intermediate shaft 2a mounted on the passive side intermediate shaft 2b Are coupled and interlocked, and if the distribution case 8 and the deceleration case 11 are relatively separated and moved along the direction of the axis P, the spline fitting between the spline boss 12 and the drive side intermediate shaft 2a is released. As a result, the interlocking connection is released (see FIG. 3).
[0020]
Since high-speed and low-torque rotational power is transmitted to the two intermediate shafts 2, each element of the distribution transmission means a such as the intermediate spur gear 7 is small, and the distribution transmission means a itself has a scale. It will be a small thing. The planetary gear mechanism b decelerates high-speed and low-torque rotational power to low-speed and high-torque, and is larger in scale than the conventional reduction gear mechanism in a synchronous transmission gear device adopting a structure in which it is decelerated and then distributed. However, there is an advantage that the size of the entire apparatus can be reduced.
[0021]
In addition, since the distribution transmission means a and the planetary gear mechanism b are detachable, the speed change ratio, the rotation direction, etc. of the distribution transmission means a are changed or the planetary gear mechanism is compared with the case where both of these are integrated. It is easy to make partial changes such as changing the specifications of b, and it has the advantage that the flexibility of change is effective and the versatility can be improved. For example, the ratio of the synchronous distribution of the output shafts 3 and 3 can be easily changed by changing the speed ratio of the distribution transmission means a and changing the speed ratio of the planetary gear mechanism b other than the final stage of one planetary gear mechanism. Further, the distribution transmission means a is provided with a distribution idler gear, and depending on the presence or absence of this idler gear, the rotation direction of the output shafts 3 and 3 can correspond to either the same direction or the reverse direction.
[0022]
[Another embodiment]
<< 1 >> As shown in FIG. 4, a synchronous transmission gear device A may be used in which a plurality of planetary gear mechanisms b, b are arranged relative to each other so as to be displaced from each other in the direction of the axis P of the intermediate rotating body. That is, the length of one intermediate shaft 2 is extended, and the planetary gear mechanism b and the distribution transmission means a are connected to each other via a connecting case 25 such as a cylindrical shape. By shifting the portion of the second ring gear 18 that defines the maximum diameter in the direction of the axis P, the planetary gear mechanisms b and b enter each other when viewed in the direction of the axis P. Thereby, the distance between the shafts of the output shafts 3 and 3 can be shortened, and the size in the width direction as the synchronous transmission gear device A can be made compact.
[0023]
<< 2 >> The passive spur gear 6 is rotatably supported by the distribution case 8 as a single product, and the intermediate shaft 2 provided with the first input gear 14 is greatly protruded so that the distribution case 8 and the speed reduction case 11 A structure in which the intermediate shaft 2 and the passive spur gear 6 are directly spline-fitted with the connection operation is also possible. In this case, the intermediate shaft 2 corresponds to the “intermediate rotating body” described in claim 1, and the passive spur gear 6 corresponds to the “drive-side rotating body” described in claim 1 .
[0024]
<< 3 >> The first input gear 14 is rotatably supported by the speed reduction case 11 as a single product, and the drive-side intermediate shaft 2a linked to the passive spur gear 6 is greatly protruded to reduce the distribution case 8 and the speed reduction. A structure in which the drive-side intermediate shaft 2a and the first input gear 14 are directly spline-fitted with the connection operation with the case 11 is also possible. In this case, the first input gear 14 is described in claim 1. the equivalent to the "intermediate rotor", and the drive-side intermediate shaft 2a corresponds to the "driving-side rotator" described in claim 1.
[0025]
<< 4 >> For example, the distribution case 8 includes a plurality of bevel gears as an output rotator, and includes a bevel gear that meshes with the bevel gear as an input rotator of the speed reduction case 11. It is also possible to adopt a structure in which both bevel gears are engaged and separated by sliding movement.
[0027]
<< 5 >> The distribution transmission means a can be variously changed such as a chain transmission mechanism, a belt transmission mechanism, or a hydraulic transmission mechanism, and is not limited to a gear transmission mechanism.
[0028]
【The invention's effect】
In the synchronous transmission gear device according to claim 1, the distribution transmission means that distributes the rotational power to a plurality of parts is provided on the transmission upper side than the planetary gear mechanism that is the reduction unit, and thus has a necessary function, and While making it easy to design the shaft layout after distribution, the entire device could be made compact.
Further, in the synchronous transmission gear device according to claim 1, by changing the distribution case and the reduction case in a detachable manner, it becomes easy to change the specifications of the distribution gear ratio, the reduction ratio, etc., the case change, etc. The above-mentioned effects could be achieved while making the design design flexible and rational with excellent maintainability.
[0029]
In the synchronous transmission gear device according to claim 2, the inter-plane distance of the output shaft can be shortened by devising the planetary gear mechanisms to be displaced in the axial direction of the intermediate rotating body, thereby reducing the size of the device in the width direction. The effect of the configuration of claim 1 was able to be achieved while making it possible.
[0031]
According to a third aspect of the present invention, the synchronous transmission gear device has the above-described effect by the configuration of the first or second aspect , and the transmission connection between the distribution transmission means and the planetary gear mechanism by the operation of joining and separating the distribution case and the reduction case. We were able to make it convenient to release transmission at once.
[Brief description of the drawings]
FIG. 1 is a development view showing the structure of a synchronous transmission gear device. FIG. 2 is a front view showing a reduction case and a mounting frame. FIG. 3 is a schematic view showing a separation state between a distribution case and a reduction case. System diagram of synchronous transmission gear device with mechanism displaced in the axial direction [FIG. 5] Block diagram showing schematic configuration of conventional synchronous transmission gear device [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Input shaft 2 Intermediate | middle rotary body 2a Drive side rotary body 2b Passive side intermediate shaft 8 Distribution case 11 Reduction case 18 Ring gear a Distribution transmission means b Planetary gear mechanism P Axis of intermediate rotation body

Claims (3)

Distributing transmission means a that distributes the rotational power of the input shaft 1 and transmits it to a plurality of parallel intermediate rotating bodies 2 is provided, and the rotational power of the intermediate rotating body 2 is decelerated for each of the plurality of intermediate rotating bodies 2. A planetary gear mechanism b for transmitting to the output shaft 3 having the same axis as the axis of the intermediate rotator 2 ;
It said distribution transmission means a includes a plurality of said intermediate rotating bodies more freely operatively connected them to the intermediate rotating body 2 so as to correspond to every two driving-side rotator 2a, the transfer case cover the distributor transmission means a 8 And the speed reduction case 11 covering the planetary gear mechanism b are configured to be separable and joinable, and the intermediate rotating body 2 and the driving side rotating body 2a corresponding to each other when the two cases 8 and 11 are joined. And the interlocking connection between the intermediate rotating body 2 and the driving side rotating body 2a is released in conjunction with the separation of the cases 8 and 11 ;
The speed reduction case 11 is provided for each of the plurality of planetary gear mechanisms b, and the plurality of speed reduction cases 11 are connected to a common mounting frame 23 and integrated.
The distribution case 8 is a synchronous transmission gear device configured to be separable and connectable to the plurality of reduction case 11 . The synchronous transmission gear device according to claim 1, wherein the plurality of planetary gear mechanisms are disposed relative to each other so as to be displaced from each other in the axial direction of the intermediate rotating body. The intermediate rotating body is configured as a passive-side intermediate shaft, and the driving-side rotating body is configured as a driving-side intermediate shaft, and the distribution case and the speed reduction case are separated by movement in the axial direction of the intermediate rotating body. And the synchronous transmission gear apparatus of Claim 1 or 2 comprised so that joining is freely possible.

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