CN105782355B - The transmission device of single-input double-output - Google Patents

Abstract

The invention provides a transmission device with single input and double output, which includes a base, a planetary wheel, an input shaft, a fixed gear, a rotating bracket and a transmission shaft rotatably connected to the rotating bracket, and the input shaft is provided with The central gear, the transmission shaft is provided with an eccentric bearing and a transmission gear meshing with the central gear, the planetary gear has an inner ring gear and a bearing hole, the number of teeth of the inner ring gear is larger than that of the fixed gear The number of teeth is 1-4 more, and the fixed gear is fixedly connected to the base, the eccentric bearing is installed in the bearing hole, and the external teeth coaxial with the input shaft are arranged on the rotating bracket ring and the first face gear, and the plane where the first face gear is located is perpendicular to the input shaft. By connecting the two ends of the transmission shaft to the rotation bracket, the rotation bracket is used to support the transmission shaft, and there is no need to arrange other supporting parts, so that the volume of the whole transmission device is relatively small.

Description

Single input and double output transmission

technical field

The invention relates to a mechanical transmission device, in particular to a transmission device with single input and double output.

Background technique

The transmission device is a mechanical component widely used in various fields of industry. With the development of production technology and the demand for high-quality products, especially the development needs of automation products such as robots, the transmission device is required to have a small volume and a relatively compact structure, which is convenient Installation and use and integration with servo drives.

In many industries such as machine tools, agricultural machinery, mixers, and cement production equipment, a single-input double-output transmission device with a compact structure and a relatively small volume is required, but the existing single-input double-output transmission device generally uses multiple gears to mesh with each other. Transmission, in order to obtain a specific speed and steering, the number of gears used is relatively large, which makes the transmission device relatively large in size and not compact enough in structure.

Chinese invention patent application ZL200610054486.2 discloses a single-input double-output planetary reducer, that is, a single-input double-output transmission device, including a box body, two end covers, an input gear shaft, and 2-4 transmission gears , eccentric crankshaft, ring gear with internal teeth, 1-4 balance wheels, support frame, support disc with short shaft, output center gear, high-speed output shaft, low output shaft with disc-shaped inner end, etc. Although the transmission device can also realize the function of single input and double output, and has a relatively large transmission ratio, and the load and overload capacity is relatively strong, but because it needs to be equipped with support components such as support frames and support plates, the volume of the entire transmission device is relatively large. In addition, the support plate of the device cannot be fixed, which is prone to axial movement, and the structure is not stable enough.

Contents of the invention

The purpose of the present invention is to provide a single-input and double-output transmission device with relatively small volume and stable structure.

In order to achieve the above object, the present invention adopts the first technical scheme as follows:

A transmission device with single input and double output, including a base, planetary gears, an input shaft, a fixed gear coaxial with the input shaft, a rotating bracket, and a transmission whose two ends are respectively rotatably connected to the rotating bracket. shaft, the input shaft is provided with a central gear coaxial with the input shaft, the transmission shaft is provided with an eccentric bearing and a transmission gear meshing with the central gear, and the planetary gear has a The inner ring gear meshing with each other and the bearing hole matched with the eccentric bearing, the number of teeth of the inner ring gear is 1-4 more than the number of teeth of the fixed gear, and the fixed gear is fixedly connected to the base Above, the eccentric bearing is installed in the bearing hole, and the outer ring gear coaxial with the input shaft and the first end tooth are arranged on the rotating bracket, the plane where the first end tooth is located and the The input axis is vertical.

As an improvement of the present invention, there are two transmission shafts, the two transmission shafts are parallel to each other and distributed symmetrically with the input shaft as the center, and the transmission gears on the two transmission shafts are connected to the same Mesh with the sun gear.

As an improvement of the present invention, there are two planetary wheels, each of which has two symmetrically arranged bearing holes, and the eccentric bearings are two eccentric sleeves with opposite eccentric directions and the same eccentricity. Integral double eccentric bearing, the two eccentric sleeves on the same eccentric bearing are respectively installed in the bearing holes of two different planetary wheels, and the eccentric sleeves of the two eccentric bearings on the same planetary wheel in the same direction of eccentricity.

As an improvement of the present invention, the planetary wheel is also provided with two balance holes, and the line connecting the centers of the two balance holes on the same planetary wheel is perpendicular to the line connecting the centers of the two bearing holes. , Two support shafts are also rotatably connected to the rotating bracket, each of the support shafts is respectively inserted into the corresponding balance hole.

As an improvement of the present invention, an isolating washer is provided on the support shaft, and the isolating washer is located between the two planetary wheels or between the planetary wheels and the rotating bracket.

As an improvement of the present invention, a first sleeve and a second sleeve are sleeved on the input shaft, and the first sleeve and the second sleeve are respectively located on both sides of the central gear, and A first bearing is respectively arranged between the first shaft sleeve and the second shaft sleeve and the input shaft, and a first bearing is respectively arranged between the first shaft sleeve, the second shaft sleeve and the rotating bracket. Second bearing.

As an improvement of the present invention, the first bushing is fixedly connected to the base, and the fixed gear is indirectly fixed on the base by being fixed on the first bushing.

As an improvement of the present invention, a third bearing is provided between the second shaft sleeve and the base, and a second shaft mating with the first end face teeth is fixedly arranged on the second shaft sleeve. An end face gear plate, and the end of the second bushing away from the rotating bracket is provided with a third end face tooth.

By adopting the above technical scheme, the present invention has the following beneficial effects:

1. By connecting the two ends of the transmission shaft to the rotating bracket, the rotating bracket is used to support the transmission shaft, and no other supporting parts are required, so that the volume of the entire transmission device is relatively small; at the same time, by fixing the fixed gear on the base On the seat, the fixed gear is not easy to jump when the planetary gear meshes with and separates from the fixed gear, and the structure is relatively stable.

2. Through the variable speed transmission of the central gear and the transmission gear, the transmission shaft is driven to rotate, and then the rotation of the eccentric bearing makes the planetary wheel obtain a rotational speed, which in turn drives the transmission shaft to rotate around the input shaft and the rotating bracket around the input shaft, which simplifies the transmission The structure of the device further reduces the volume of the transmission device.

3. The fixed gear and the first shaft sleeve are set separately instead of directly fixing the fixed gear on the base, which effectively reduces the size of the corresponding mounting hole on the base, thereby reducing the diameter of the entire transmission device. Furthermore, the volume of the transmission device is relatively small. In addition, when the fixed gear is worn out, only the fixed gear needs to be replaced without replacing the first shaft sleeve together, which can reduce maintenance costs.

4. By arranging the second shaft sleeve and the first shaft sleeve to correspond to each other, it can ensure that the force on the rotating bracket is balanced and avoid the generation of deflection moment.

Description of drawings

Fig. 1 is the outline schematic diagram of the transmission device of single input double output of the present invention;

Fig. 2 is the structural representation of the transmission device of single input double output of the present invention, and this figure is the sectional schematic diagram of A-A position among Fig. 1;

Fig. 3 is a schematic structural view of the planetary gear of the transmission device with single input and double output according to the present invention.

The corresponding marks in the figure are as follows:

10-base; 20-planetary gear;

21-internal gear ring; 22-bearing hole;

23-balance hole; 30-input shaft;

31-central gear; 32-first shaft sleeve;

33-the second shaft sleeve; 34-the first bearing;

35-the second bearing; 36-the third bearing;

37-the second end tooth disc; 38-the third end tooth;

40-fixed gear; 50-rotating bracket;

51-outer ring gear; 52-first face tooth;

60-drive shaft; 61-eccentric bearing;

62-transmission gear; 70-support shaft;

71 - Spacer washer.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the single-input and double-output transmission device provided by this embodiment includes a base 10, a planetary wheel 20, an input shaft 30, a fixed gear 40 coaxial with the input shaft 30 and a rotating The bracket 50 and the transmission shaft 60 rotatably connected to the rotating bracket 50 at both ends, wherein the base 10 is fixed.

The input shaft 30 is provided with a central gear 31 coaxial with the input shaft 30, and the transmission shaft 60 is provided with an eccentric bearing 61 and a transmission gear 62 meshing with the central gear 31. In this embodiment, there are two transmission shafts 60, The two transmission shafts 60 are parallel to each other and distributed symmetrically around the input shaft 30 . Of course, each transmission shaft 60 is provided with an eccentric bearing 61 and a transmission gear 62 , that is, there are two eccentric bearings 61 and two transmission gears 62 . The transmission gears 62 on the two transmission shafts 60 mesh with the same sun gear 31 .

The input shaft 30 is sleeved with a first shaft sleeve 32 and a second shaft sleeve 33, the first shaft sleeve 32 and the second shaft sleeve 33 are respectively located on both sides of the central gear 31, and the first shaft sleeve 32 and the second shaft sleeve 33 and the input shaft 30 are respectively provided with a first bearing 34 , and between the first shaft sleeve 32 and the second shaft sleeve 33 and the rotating bracket 50 are respectively provided with a second bearing 35 . In this way, the input shaft 30 can provide support for the rotating bracket.

The planetary gear 20 has an internal ring gear 21 that meshes with the fixed gear 40 and a bearing hole 22 that cooperates with the eccentric bearing 61. The number of teeth of the internal ring gear 21 is 1-4 more than that of the fixed gear 40, so that the two can To form a transmission with few tooth differences, the specific number of teeth of the ring gear 21 and the fixed gear 40 can be determined according to actual needs. In this embodiment, there are also two planetary gears 20, and the ring gears 21 of the two planetary gears 20 mesh with the same fixed gear 40. The bearing holes 22 are arranged symmetrically, respectively corresponding to the two eccentric bearings 61 on the two transmission shafts 60 .

The eccentric bearing 61 is installed in the bearing hole 22. After installation, the centerline of the planetary wheel 20 deviates from the centerline of the input shaft 30, and the distance between the centerline of the planetary wheel 20 and the centerline of the input shaft 30 is equal to the eccentric axis of the eccentric bearing 61. and the distance between the centerline of the propeller shaft 60. And the eccentric direction of the planetary gear 20 relative to the input shaft 30 is the same as the eccentric direction of the eccentric bearing 61 .

Preferably, the eccentric bearing 61 in this implementation is an integral double eccentric bearing with opposite eccentric directions and the same eccentricity of the two eccentric sleeves, and its model is 752000. In the bearing hole 22 of 20, the eccentric directions of the corresponding eccentric sleeves of the two eccentric bearings 61 on the same planetary wheel 20 are the same, so as to ensure that the meshing positions of the ring gears 21 of the two planetary wheels 20 and the fixed gear 40 are symmetrical to each other. At the same time, the eccentric bearing 61 can connect the two planetary wheels 20 into a whole, effectively increasing the stability of the transmission device during operation.

Preferably, the planetary wheel 20 of this embodiment is further provided with two balance holes 23 , and the line connecting the centers of the two balance holes 23 on the same planetary wheel 20 is perpendicular to the line connecting the centers of the two bearing holes 22 . At the same time, two support shafts 70 are also rotatably connected to the rotating bracket 50. The two support shafts 70 are symmetrical to each other with the input shaft 30 as the center, and are parallel to the transmission shaft 60 respectively. Each support shaft 70 is inserted in the corresponding balance hole. Within 23. The function of the support shaft 70 is to transmit the rotational torque of the rotating bracket 50 to ensure that the rotating bracket 50 is stressed stably. Each support shaft 70 is also sleeved with three isolation washers 71, and the three isolation washers 71 are respectively located between each planet wheel 20 and the rotating bracket 50 and between the two planet wheels 20, for isolating the two planet wheels 20 and The planetary wheel 20 and the rotating bracket 50 prevent the planetary wheel 20 from swaying and improve the rotation accuracy.

It should be noted that since the balance hole 23 and the support shaft 70 are not necessarily arranged coaxially, the diameter of the balance hole 23 needs to be larger than the diameter of the support shaft 70 to ensure that the two do not touch each other and do not interfere with each other.

The fixed gear 40 is fixedly connected to the base 10 directly or indirectly, that is, the fixed gear 40 is fixed. In this embodiment, the fixed gear 40 is indirectly fixedly connected to the base 10. Specifically, the first sleeve 32 is fixedly connected to the base 10 through a screw assembly, and the fixed gear 40 is fixed on the first The shaft sleeve 32 is indirectly fixed on the base 10 . Of course, it is also possible to directly connect the fixed gear 40 and the first shaft sleeve 32 in one piece, that is, make the two into one same part.

The rotating bracket 50 is provided with an outer ring gear 51 coaxial with the input shaft 30 and a first end tooth 52 , and the plane where the end tooth 52 is located is perpendicular to the input shaft 30 . A third bearing 36 is arranged between the second shaft sleeve 33 and the base 10, and a second end face toothed disc 37 that matches the first end face gear 52 is also fixedly arranged on the second shaft sleeve 33, and the second shaft sleeve 33 The end away from the rotating bracket 50 is provided with a third face tooth 38 .

When working, the input shaft 30 is driven by external power to rotate, the central gear 31 drives the transmission gear 62 to rotate, and then drives the transmission shaft 60 to rotate, and the transmission shaft 60 will drive the two eccentric bearings 61 to rotate, and the torque generated by the rotation of the eccentric bearings 61 will be Drive the planetary gear 20 to rotate around the center line of the planetary gear 20 itself, that is, the planetary gear 20 rotates on its own, and at the same time, the fixed gear 40 meshed with the inner ring gear 21 of the planetary gear 20 is fixed, and the fixed gear 40 and the input shaft coaxial, and the planetary gear 20 is eccentric relative to the input shaft 30, the planetary gear 20 will also rotate around the centerline of the fixed gear 40 while rotating, that is, the planetary gear 20 revolves, and the planetary gear 20 will pass through the eccentric bearing 61 while revolving Drive the rotating bracket 50 to rotate with the transmission shaft 60, and then output power through the outer ring gear 51 and the first end tooth 52. Of course, the power of the first end tooth 52 will pass through the second end tooth plate 37 and the second bushing 33 in turn. and the third end face tooth 38 to conduct the single input and double output of the rotating speed.

It should be noted that, since the transmission device in this embodiment is not fixed-axis transmission, its transmission ratio cannot be calculated by the method of calculating the fixed-axis transmission ratio, but needs to be calculated by using the conversion mechanism method and other methods. The method of calculating the transmission ratio commonly used in the field will not be described in detail here.

The present invention has been described in detail above in conjunction with the accompanying drawings, but the embodiments of the present invention are not limited to the above-mentioned embodiments. Those skilled in the art can make various modifications to the present invention according to the prior art, and these all belong to the protection scope of the present invention .

Claims (7)

1. A transmission device with single input and double output, comprising a base, characterized in that it also includes a planetary wheel, an input shaft, a fixed gear coaxial with the input shaft and a rotating bracket, and the two ends are respectively rotatably connected to the The transmission shaft on the rotating bracket, the input shaft is provided with a central gear coaxial with the input shaft, the transmission shaft is provided with an eccentric bearing and a transmission gear meshing with the central gear, the planet The wheel has an inner ring gear that meshes with the fixed gear and a bearing hole that cooperates with the eccentric bearing. The number of teeth of the inner ring gear is 1-4 more than that of the fixed gear, and the fixed gear is fixed Connected to the base, the eccentric bearing is installed in the bearing hole, and the rotating bracket is provided with an outer ring gear coaxial with the input shaft and a first end tooth, and the first end tooth The plane where it is located is perpendicular to the input axis; A first shaft sleeve and a second shaft sleeve are sleeved on the input shaft, the first shaft sleeve and the second shaft sleeve are respectively located on both sides of the central gear, and the first shaft sleeve and the second shaft sleeve First bearings are respectively arranged between the second shaft sleeve and the input shaft, and second bearings are respectively arranged between the first shaft sleeve, the second shaft sleeve and the rotating bracket. 2. The transmission device with single input and double output as claimed in claim 1, characterized in that, there are two transmission shafts, the two transmission shafts are parallel to each other and distributed symmetrically with the input shaft as the center, and the two transmission shafts The transmission gear on the transmission shaft meshes with the same sun gear. 3. The transmission device with single input and double output as claimed in claim 2, characterized in that, there are two planetary wheels, and each of the planetary wheels has two symmetrically arranged bearing holes, and the eccentric The bearing is an integral double eccentric bearing with opposite eccentric directions and the same eccentricity of the two eccentric sleeves. The two eccentric sleeves on the same eccentric bearing are respectively installed in the bearing holes of two different planetary wheels, located in the same The eccentric directions of the eccentric sleeves of the two eccentric bearings on the planetary wheel are the same. 4. The transmission device with single input and double output as claimed in claim 3, wherein the planetary wheel is also provided with two balance holes, and the line connecting the centers of the two balance holes on the same planetary wheel The line connecting the centers of the two bearing holes is perpendicular to each other, and two supporting shafts are rotatably connected to the rotating bracket, and each of the supporting shafts is respectively inserted into the corresponding balancing hole. 5. The transmission device with single input and double output as claimed in claim 4, characterized in that, an isolating washer is arranged on the support shaft, and the isolating washer is located between the two planetary wheels or between the planetary wheel and the planetary wheel. between the rotating brackets. 6. The single-input and double-output transmission device according to claim 1, characterized in that, the first bushing is fixedly connected to the base, and the fixed gear is fixed on the first bushing Indirectly fixed on the base. 7. The transmission device with single input and double output according to claim 1, characterized in that, a third bearing is arranged between the second bushing and the base, and a third bearing is fixedly arranged on the second bushing There is a second end tooth plate matched with the first end tooth, and the end of the second bushing away from the rotating bracket is provided with a third end tooth.