Concentric double-output-shaft speed reducer

Abstract

The utility model provides a concentric double-output-shaft speed reducer, and belongs to the technical field of mechanical transmission. The hollow outer output shaft is rotatably installed on the box body, the inner output shaft is coaxially and rotatably installed in the hollow of the outer output shaft, meanwhile, one end of the inner output shaft extends out of the outer output shaft and is provided with the driving gear, and the driven gear is installed outside the outer output shaft. In addition, the end, extending out of the outer output shaft, of the inner output shaft is directly connected with a rotating shaft of the driver, so that the inner output shaft can be directly driven by the driver to operate, and meanwhile, the inner output shaft drives the outer output shaft to operate through the driving gear, the middle speed reduction assembly and the driven gear. Therefore, the purpose that one driver drives the inner output shaft and the outer output shaft at the same time is achieved, the utilization rate is higher, the use requirement that the inner output shaft and the outer output shaft output differential rotating speeds in the same direction can be met, the structure is simple, manufacturing is convenient, and the structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical transmission, in particular to a concentric double-output shaft reducer. Background Art

[0002] In mechanical equipment, in order to improve processing efficiency and save costs, one drive device is usually used to drive multiple parts to operate simultaneously, thereby improving the utilization rate of the drive device and also helping to reduce the size of the equipment.

[0003] In the industry, in order to improve the utilization rate of the driving device, a power distribution structure is usually set between the driving device and multiple loads, such as a double-output planetary reducer disclosed in patent CN108180258A, which has a double output shaft horizontally installed in the housing through the fourth bearing, and a central gear is fixed to the middle of the double output shaft, and a fixed gear is installed at the left end of the housing, and the fixed gear is sleeved on the left half of the double output shaft through the fifth bearing, and the right half of the double output shaft is installed with a double gear through the first bearing, and the planetary wheel carrier is sleeved on the fixed gear and the double gear through the second bearing and the third bearing, and a gear set is symmetrically installed on the planetary wheel carrier, and the gear set consists of a first planetary gear, a second planetary gear and a third planetary gear installed concentrically and coaxially, and the first planetary gear is meshed with the small end of the double gear, The second planetary gear meshes with the central gear, the third planetary gear meshes with the fixed gear, the power is input from the large end of the double gear, the first planetary gear drives the planetary wheel frame to rotate while the first planetary gear, the second planetary gear and the third planetary gear coaxially and concentrically rotate, and the third planetary gear rotates around the fixed gear at the same time, and then the second planetary gear and the central gear drive the double output shaft to rotate to output power from both ends of the double output shaft. In addition, the box body is equipped with a power input gear and a reduction gear, the power input gear meshes with the reduction gear, the reduction gear meshes with the large end of the double gear, and the power input gear is connected to a drive motor, that is, the drive motor can simultaneously drive the double output shaft to rotate, thereby driving the load connected to the double output shaft to move, realizing one drive motor multiple power distribution, and improving the utilization rate of the drive motor. Although the above-mentioned reduction mechanism can realize power distribution, it adopts planetary gear transmission, the transmission structure is complex, and the processing and manufacturing are inconvenient. At the same time, the output ends of its double output shafts are respectively located at the two ends of the box body, the structure is scattered, and it cannot meet the use requirements of outputting power in the same direction, and the speed of the two output ends of the double output shaft is consistent, which cannot meet the differential processing requirements. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, the present invention aims to provide a concentric dual-output shaft reducer, wherein an inner output shaft and an outer output shaft which are coaxially sleeved are arranged in a housing, and the inner output shaft and the outer output shaft are rotatably installed, and one end of the inner output shaft extends out of the outer output shaft and is installed with a driving gear, and a driven gear is installed outside the outer output shaft. At the same time, an intermediate reduction assembly is also arranged in the housing, and the input gear and the output gear of the intermediate reduction assembly are meshed with the driving gear and the driven gear respectively. In addition, the inner output shaft is directly connected to the rotating shaft of the driver, so that the driver can directly drive the inner output shaft to rotate, and the inner output shaft drives the outer output shaft to rotate through the intermediate reduction assembly, thereby realizing concentric and unidirectional power output of the inner output shaft and the outer output shaft, and also realizing differentiated setting of the rotation speeds of the inner output shaft and the outer output shaft. Not only is the structure simple and compact, but also the processing and manufacturing are more convenient, and it can meet the requirements of unidirectional output power and differential processing.

[0005] The specific technical solutions are as follows:

[0006] A concentric dual output shaft reducer has the following characteristics:

[0007] A box body, wherein the box body has an inner cavity;

[0008] The external output shaft is a hollow shaft, which is rotatably mounted on the side wall of the box body and one end of which is located in the inner cavity, and the other end of which extends out of the box body, and a driven gear is coaxially mounted on the end of the external output shaft located in the inner cavity;

[0009] An inner output shaft, the inner output shaft is coaxially arranged in the hollow of the outer output shaft, the inner output shaft and the outer output shaft are rotatably mounted, and at the same time, one end of the inner output shaft extends from one end of the outer output shaft located in the inner cavity and is coaxially mounted with a driving gear, and the other end of the inner output shaft extends to the outside of the box, and the end of the inner output shaft mounted with the driving gear is connected to the rotating shaft of the driver;

[0010] The intermediate reduction assembly is arranged in the inner cavity, and the intermediate reduction assembly has an input gear and an output gear, and the input gear is meshed with the driving gear, and the output gear is meshed with the driven gear.

[0011] The above-mentioned concentric dual-output shaft reducer, wherein the intermediate reduction assembly includes a plurality of intermediate shafts, a plurality of transmission pinions and a plurality of transmission gears, the plurality of intermediate shafts are arranged in the same direction and at intervals, and both ends of each intermediate shaft are rotatably mounted on the two side walls of the box body, and at the same time, a transmission pinion and a transmission gear are coaxially mounted on each intermediate shaft, the transmission gear and the transmission pinion on one intermediate shaft are respectively meshed with the driving gear and the transmission gear of another intermediate shaft, and the transmission pinion of the other intermediate shaft is meshed with the transmission gear on one of the remaining intermediate shafts, until the transmission pinion of the last intermediate shaft is meshed with the driven gear.

[0012] In the above-mentioned concentric dual-output shaft reducer, the driving gear and the inner output shaft are an integrated structure, the driven gear and the outer output shaft are an integrated structure, and the intermediate shaft and the transmission pinion are an integrated structure.

[0013] In the above-mentioned concentric dual-output shaft reducer, a rotating bearing is arranged between the inner output shaft and the outer output shaft, the inner ring of the rotating bearing is in contact with the outer wall of the inner output shaft, and the outer ring of the rotating bearing is in contact with the hollow inner wall of the outer output shaft.

[0014] In the above-mentioned concentric dual-output shaft reducer, a sealing ring is arranged between the inner output shaft and the outer output shaft, and the sealing ring is arranged on the side of the rotating bearing close to the outside of the housing.

[0015] In the above-mentioned concentric dual-output shaft reducer, the inner cavity of the box is filled with cutting fluid, and a liquid inlet is provided on the box.

[0016] In the above-mentioned concentric dual-output shaft reducer, the inner output shaft is a hollow structure, and a plurality of flow holes connecting the outer side and the hollow are opened on the side wall of the inner output shaft along its radial direction.

[0017] The above-mentioned concentric dual-output shaft reducer, wherein a knife shaft is inserted into the end of the inner output shaft extending out of the box body, and at the same time, a protruding guide limit block is provided on the inner wall of the end of the inner output shaft extending out of the box body along its axial direction, and a concave guide limit groove is provided on the outer wall of the knife shaft along its axial direction; or a concave guide limit groove is provided on the inner wall of the end of the inner output shaft extending out of the box body along its axial direction, and a protruding guide limit block is provided on the outer wall of the knife shaft along its axial direction.

[0018] The above-mentioned concentric dual-output shaft reducer, wherein a plane bearing and a gas spring are also arranged inside the inner output shaft, one end of the plane bearing abuts against the rotating shaft of the driver connected to the inner output shaft, the other end of the plane bearing abuts against one end of the gas spring, and the other end of the gas spring abuts against one end of the knife shaft extending into the inner output shaft.

[0019] The above-mentioned concentric dual-output shaft reducer, wherein the box body includes a base, two support plates and an intermediate cover plate, support plates are fixedly installed at both ends of the base, the inner output shaft, the outer output shaft and the intermediate shaft are rotatably installed on the support plates, the intermediate cover plate is arranged between the two support plates, and the two ends of the intermediate cover plate are respectively connected to the two support plates, the bottom of the intermediate cover plate is connected to the base, and the base, the two support plates and the intermediate cover plate form an inner cavity.

[0020] The positive effects of the above technical solution are:

[0021] The above-mentioned concentric dual-output shaft reducer realizes the same-direction output by arranging the inner output shaft and the outer output shaft which are coaxially sleeved on the housing. At the same time, one end of the inner output shaft is extended to the outside of the outer output shaft and is installed with a driving gear, and a driven gear is installed outside the outer output shaft. In addition, an intermediate reduction assembly is also arranged in the housing, and the input gear and the output gear of the intermediate reduction assembly are meshed with the driving gear and the driven gear respectively. At the same time, one end of the inner output shaft is directly connected to the rotating shaft of the driver, so that the driver can directly drive the inner output shaft to rotate, and the inner output shaft drives the outer output shaft to rotate through the intermediate reduction assembly, so that the purpose of one driver driving the two output shafts to output power at the same time is achieved, and the differentiated arrangement of the rotation speed between the inner output shaft and the outer output shaft is also achieved through the intermediate reduction assembly. The structure is simple and compact, which is convenient for processing and manufacturing, and meets the use requirements of differentiated power output in the same direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of an embodiment of a concentric dual output shaft reducer of the utility model;

[0023] Figure 2 This is a structural diagram after the box is opened in a preferred embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the installation of the inner output shaft, the outer output shaft and the intermediate reduction assembly of a preferred embodiment of the utility model;

[0025] Figure 4 This is a structural diagram of the inner output shaft of a preferred embodiment of the utility model.

[0026] In the attached drawings: 1. Box body; 11. Base; 12. Support plate; 13. Intermediate cover plate; 2. External output shaft; 21. Driven gear; 3. Internal output shaft; 31. Driving gear; 32. Flow hole; 33. Guide limit block; 4. Rotating shaft; 5. Intermediate reduction assembly; 51. Intermediate shaft; 52. Transmission pinion; 53. Transmission gear; 6. Rotating bearing. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 4 The technical solution provided by the utility model is described in detail, but the following content is not intended to limit the utility model.

[0028] Figure 1 This is a structural diagram of an embodiment of a concentric dual output shaft reducer of the utility model; Figure 2 This is a structural diagram after the box is opened in a preferred embodiment of the utility model; Figure 3This is a schematic diagram of the installation of the inner output shaft, the outer output shaft and the intermediate reduction assembly of a preferred embodiment of the utility model. Figure 1 and Figure 2 As shown, the concentric dual output shaft reducer provided in this embodiment includes: a casing 1, an outer output shaft 2, an inner output shaft 3 and an intermediate reduction assembly 5. The casing 1 has an inner cavity. At this time, one end of the outer output shaft 2, one end of the inner output shaft 3 and the intermediate reduction assembly 5 are all arranged in the inner cavity of the casing 1. External protection is achieved through the casing 1, and safety is higher.

[0029] Specifically, the outer output shaft 2 is a hollow shaft. At this time, the outer output shaft 2 is rotatably mounted on the side wall of the housing 1, so that the outer output shaft 2 can rotate freely on the housing 1. At the same time, one end of the outer output shaft 2 is located in the inner cavity, and the other end of the outer output shaft 2 extends out of the housing 1, so that one end of the subsequent outer output shaft 2 can cooperate with the intermediate reduction assembly 5 in the inner cavity of the housing 1, and the other end is connected to the load after extending out of the housing 1, so as to realize the power output on the outer output shaft 2. In addition, a driven gear 21 is coaxially mounted on one end of the outer output shaft 2 located in the inner cavity, so that the subsequent driven gear 21 can drive the outer output shaft 2 to rotate, and at the same time, the driven gear 21 can cooperate with the intermediate reduction assembly 5 to realize the stable transmission of power.

[0030] Specifically, the inner output shaft 3 is concentrically inserted into the hollow of the outer output shaft 2, so that the inner output shaft 3 and the outer output shaft 2 are concentrically arranged, which provides conditions for the inner output shaft 3 and the outer output shaft 2 to output concentrically and in the same direction, and improves the compactness of the structure. At this time, the inner output shaft 3 and the outer output shaft 2 are rotatably installed, which provides conditions for the inner output shaft 3 and the outer output shaft 2 to output power at different speeds in a differentiated manner in the future. At the same time, one end of the inner output shaft 3 is extended from the end of the outer output shaft 2 located in the inner cavity, so that one end of the inner output shaft 3 can also extend into the inner cavity, which provides conditions for the subsequent one end of the inner output shaft 3 to be directly connected to the rotating shaft 4 of the driver in the box body 1. At this time, a driving gear 31 is coaxially installed on the end of the inner output shaft 3 extending into the inner cavity, so that the inner output shaft 3 can transmit power to the intermediate reduction assembly 5 through the driving gear 31 in the future, which provides conditions for the subsequent intermediate reduction assembly 5 to drive the outer output shaft 2 to rotate. In addition, the other end of the inner output shaft 3 is extended outside the housing 1, which facilitates the subsequent installation of an external load on the inner output shaft 3. In addition, the end of the inner output shaft 3 on which the driving gear 31 is installed is connected to the rotating shaft 4 of the driver, so that the rotating shaft 4 of the driver can directly drive the inner output shaft 3 to rotate and realize power output. Preferably, the rotating shaft 4 of the driver is connected to the inner output shaft 3 through a key, realizing the circumferential limit of the inner output shaft 3 and the rotating shaft 4, so that the driver can directly drive the inner output shaft 3 to rotate and output corresponding power.

[0031] Specifically, the intermediate reduction assembly 5 is arranged in the inner cavity of the housing 1. At this time, the intermediate reduction assembly 5 includes an input gear and an output gear, and the input gear is meshed with the driving gear 31, so that the inner output shaft 3 can realize power input through the mutual meshing of the driving gear 31 and the input gear. At the same time, the output gear is meshed with the driven gear 21, so that the power input into the intermediate reduction assembly 5 can realize power output through the meshing of the output gear and the driven gear 21, and the intermediate reduction assembly 5 can reduce the output speed, so that the speeds of the inner output shaft 3 and the outer output shaft 2 can be different, thereby maintaining the differentiation of the output power and meeting different processing requirements.

[0032] More specifically, the intermediate reduction assembly 5 disposed between the driving gear 31 and the driven gear 21 further includes a plurality of intermediate shafts 51, a plurality of transmission pinions 52, and a plurality of transmission gears 53. At this time, the plurality of intermediate shafts 51 are arranged in the same direction and at intervals, and the intermediate shafts 51 are arranged parallel to the inner output shaft 3 or the outer output shaft 2, and both ends of each intermediate shaft 51 are rotatably mounted on the two side walls of the housing 1, so that each intermediate shaft 51 can rotate freely in the housing 1. At the same time, a transmission pinion 52 and a transmission gear 53 are coaxially mounted on each intermediate shaft 51, and the intermediate shaft 51 and its corresponding transmission pinion 52 and transmission gear 53 are circumferentially limited, so that the transmission pinion 52 and transmission gear 53 can rotate synchronously with the corresponding intermediate shaft 51, providing conditions for subsequent power transmission. During installation, the transmission gear 53 and the transmission pinion 52 on one intermediate shaft 51 are meshed with the driving gear 31 and the transmission gear 53 of another intermediate shaft 51 respectively. At this time, the transmission gear 53 meshed with the driving gear 31 serves as the input gear of the intermediate reduction assembly 5, and the transmission pinion 52 of another intermediate shaft 51 is meshed with the transmission gear 53 on one of the remaining intermediate shafts 51. In this way, the connection of the intermediate shafts 51 is realized in sequence until the transmission gear 53 of the last intermediate shaft 51 is meshed with the transmission pinion 52 of the previous intermediate shaft 51, and the transmission pinion 52 of the last intermediate shaft 51 is meshed with the driven gear 21. At this time, the transmission pinion 52 meshed with the driven gear 21 serves as the output gear of the intermediate reduction assembly 5. That is, by providing a plurality of intermediate shafts 51 and by alternately meshing the transmission gears 53 and the transmission pinions 52 on the intermediate shafts 51, multi-stage reduction is realized, so as to achieve the use requirement that the rotation speed of the outer output shaft 2 is less than the rotation speed of the inner output shaft 3. It is worth pointing out that the designer can select a suitable number of intermediate shafts 51 according to the differential requirements of the inner output shaft 3 and the outer output shaft 2 to meet different deceleration requirements.

[0033] More specifically, the driving gear 31 and the inner output shaft 3 are arranged in an integrated structure. Similarly, the driven gear 21 and the outer output shaft 2 are arranged in an integrated structure, and the intermediate shaft 51 and the transmission pinion 52 are arranged in an integrated structure, so that the inner output shaft 3, the outer output shaft 2 and the intermediate shaft 51 are all gear shafts, which can reduce the assembly steps, make installation more convenient, and have higher structural stability.

[0034] More specifically, a rotating bearing 6 is arranged between the inner output shaft 3 and the outer output shaft 2. At this time, the inner ring of the rotating bearing 6 is fitted with the outer wall of the inner output shaft 3, and the outer ring of the rotating bearing 6 is fitted with the hollow inner wall of the outer output shaft 2, that is, the inner output shaft 3 is stably supported in the hollow of the outer output shaft 2 by the rotating bearing 6, which not only meets the use requirement of the inner output shaft 3 rotating relative to the outer output shaft 2, but also reduces wear and prolongs the service life. In addition, a gap can be created between the inner output shaft 3 and the outer output shaft 2, providing conditions for the subsequent cutting fluid to enter the inner output shaft 3 from the rotating bearing 6.

[0035] More specifically, a sealing ring is also provided between the inner output shaft 3 and the outer output shaft 2. At this time, the sealing ring is provided on the side of the rotating bearing 6 close to the outside of the housing 1. The gap between the inner output shaft 3 and the outer output shaft 2 is blocked by the sealing ring, which prevents subsequent cutting fluid from leaking from the gap between the inner output shaft 3 and the outer output shaft 2, providing conditions for higher safety assurance. It is worth pointing out that the sealing ring can be a commonly used labyrinth oil seal and labyrinth water seal on the market, which can be directly purchased and used, so the specific structure of the sealing ring is not repeated here.

[0036] More specifically, cutting fluid is also injected into the inner cavity of the housing 1. At this time, a liquid inlet is provided on the housing 1, and the cutting fluid enters the inner cavity of the housing 1 from the liquid inlet. The cutting fluid lubricates and cools the transmission structures in the inner cavity to ensure the performance of the reducer and extend the service life of the reducer. In addition, cutting fluid is also provided for the load subsequently installed on the inner output shaft 3, and the structural design is more reasonable. It is worth pointing out that a liquid outlet can also be provided on the housing 1, so that the cutting fluid can be discharged not only through the inner output shaft 3, but also through the liquid outlet, so as to realize the rapid circulation of the cutting fluid.

[0037] Figure 4 This is a structural diagram of the inner output shaft of a preferred embodiment of the utility model. Figure 2 , Figure 3 as well as Figure 4As shown, the inner output shaft 3 is set as a hollow structure. At this time, a number of flow holes 32 connecting the outer side and the hollow are opened on the side wall of the inner output shaft 3 along its radial direction, that is, the flow holes 32 connect the inner and outer spaces of the inner output shaft 3, so that the cutting fluid in the inner cavity of the box body 1 can enter the inner output shaft 3 through the flow holes 32, and the inner output shaft 3 can subsequently provide cutting fluid for the load installed on the inner output shaft 3, and the structural utilization rate is higher. It is worth pointing out that after the inner output shaft 3 is installed in the outer output shaft 2, the flow holes 32 on the inner output shaft 3 are all located at the position where the inner output shaft 3 is installed with the rotating bearing 6, so that the cutting fluid in the inner cavity of the box body 1 can enter the flow holes 32 through the gap of the rotating bearing 6, ensuring the smooth flow of the cutting fluid flow channel. In addition, the plurality of flow holes 32 are distributed in a ring array with the central axis of the inner output shaft 3 as the axis, so that the uniform distribution of the plurality of flow holes 32 on the inner output shaft 3 is achieved, ensuring that the cutting fluid flowing into the inner output shaft 3 can be more stable and the structural design is more reasonable.

[0038] More specifically, a cutter shaft is inserted into the end of the inner output shaft 3 extending out of the housing 1, that is, the cutter shaft is a load installed on the inner output shaft 3. At this time, a protruding guide stopper 33 is provided on the inner wall of the end of the inner output shaft 3 extending out of the housing 1 along its axial direction, and at the same time, a concave guide stopper groove is provided on the outer wall of the cutter shaft along its axial direction. After one end of the cutter shaft is inserted into the inner output shaft 3, the guide stopper 33 is embedded in the guide stopper groove. At this time, the circumferential limit of the inner output shaft 3 and the cutter shaft is realized through the cooperation of the guide stopper block 33 and the guide stopper groove, so that the inner output shaft 3 can drive the cutter shaft to rotate stably to meet the processing requirements. At the same time, the guide stopper block 33 can slide relatively along the axial direction of the inner output shaft 3 in the guide stopper groove to realize the axial extension and contraction of the cutter shaft on the inner output shaft 3, thereby realizing the floating arrangement of the extension length of the cutter shaft, which provides conditions for preventing the extrusion damage of the cutter shaft during the subsequent processing. It is worth pointing out that the arrangement of the guide limit block 33 and the guide limit groove behind the inner output shaft 3 and on the knife shaft can also be interchanged, that is, an inner wall of one end of the inner output shaft 3 extending outside the box body 1 is provided with a concave guide limit groove along its axial direction, and a protruding guide limit block 33 is provided on the outer wall of the knife shaft along its axial direction, which can also meet the usage requirements.

[0039] More specifically, a plane bearing and a gas spring are also provided in the inner output shaft 3. At this time, one end of the plane bearing is abutted against the rotating shaft 4 of the driver connected to the inner output shaft 3, and at the same time, the other end of the plane bearing is abutted against one end of the gas spring. The gas spring is arranged along the axial direction of the inner output shaft 3, and the other end of the gas spring is abutted against one end of the knife shaft extending into the inner output shaft 3, that is, the end of the knife shaft inserted into the inner output shaft 3 is supported and elastically applied by the plane bearing and the gas spring, which can not only make the knife shaft have a certain support strength, but also provide a margin for the floating of the knife shaft through the retraction of the gas spring when the knife shaft is over-extended, and also provide thrust for the subsequent reset of the knife shaft. In addition, the plane bearing can prevent the relative torsion of the gas spring, avoid the problem of damage after the gas spring is accidentally twisted, and the structural design is more reasonable.

[0040] More specifically, the box body 1 with an inner cavity further comprises a base 11, two support plates 12 and an intermediate cover plate 13. At this time, the support plates 12 are fixedly installed at both ends of the base 11, and the inner output shaft 3, the outer output shaft 2 and the intermediate shaft 51 are all rotatably installed on the support plates 12, that is, the support plates 12 serve as the main supporting structure, providing a mounting carrier for the inner output shaft 3, the outer output shaft 2 and the intermediate shaft 51. In addition, one side of the intermediate cover plate 13 is arranged in an "n" shape, so that the intermediate cover plate 13 has a cavity. When installing, the intermediate cover plate 13 is arranged between the two support plates 12, and the two ends of the intermediate cover plate 13 are respectively connected to the two support plates 12. At the same time, the bottom of the intermediate cover plate 13 is connected to the base 11, so that the base 11, the two support plates 12 and the intermediate cover plate 13 can surround the inner cavity of the box body 1, realizing the split arrangement of the box body 1, and facilitating the disassembly and assembly of the structures such as the inner output shaft 3, the outer output shaft 2 and the intermediate reduction assembly 5 in the box body 1. It is worth pointing out that the support seat and the base 11 can be connected by bolts or welding, and the middle cover plate 13, the support plate 12 and the base 11 are connected by bolts, which is more convenient for disassembly and assembly. At the same time, if the support seat and the base 11 are connected by bolts, sealing gaskets are provided between the support seat and the base 11 and between the middle cover plate 13, the support plate 12 and the base 11 to prevent leakage of cutting fluid, and the structural design is more reasonable.

[0041] The concentric dual output shaft reducer provided in the present embodiment comprises a housing 1, an outer output shaft 2, an inner output shaft 3 and an intermediate reduction assembly 5; the hollow outer output shaft 2 is rotatably mounted on the housing 1, and the inner output shaft 3 is coaxially and rotatably mounted in the hollow of the outer output shaft 2. At the same time, one end of the inner output shaft 3 extends out of the outer output shaft 2 and is installed with a driving gear 31, and a driven gear 21 is installed outside the outer output shaft 2, and an intermediate reduction assembly 5 is arranged between the driving gear 31 and the driven gear 21. In addition, one end of the inner output shaft 3 extending out of the outer output shaft 2 is directly connected to the rotating shaft 4 of the driver, so that the inner output shaft 3 can be directly driven to operate by the driver. At the same time, the inner output shaft 3 drives the outer output shaft 2 to operate through the driving gear 31, the intermediate reduction assembly 5 and the driven gear 21, thereby achieving the purpose of a driver driving the inner output shaft 3 and the outer output shaft 2 at the same time, with higher utilization rate, and can meet the use requirements of the inner output shaft 3 and the outer output shaft 2 outputting differentiated speeds in the same direction, with simple structure, convenient manufacturing and more compact structure.

[0042] The above are only preferred embodiments of the present invention, and do not limit the implementation mode and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A concentric dual output shaft reducer, characterized in that: include: A box body, wherein the box body has an inner cavity; An external output shaft, which is a hollow shaft, is rotatably mounted on the side wall of the box body and one end of the external output shaft is located in the inner cavity, and the other end of the external output shaft extends out of the box body, and a driven gear is coaxially mounted on one end of the external output shaft located in the inner cavity; An inner output shaft, the inner output shaft is coaxially arranged in the hollow of the outer output shaft, the inner output shaft and the outer output shaft are rotatably mounted, and at the same time, one end of the inner output shaft extends from one end of the outer output shaft located in the inner cavity and is coaxially mounted with a driving gear, the other end of the inner output shaft extends outside the box body, and one end of the inner output shaft mounted with the driving gear is connected to the rotating shaft of the driver; An intermediate reduction assembly is disposed in the inner cavity and has an input gear and an output gear, wherein the input gear is meshed with the driving gear, and the output gear is meshed with the driven gear.

2. The concentric dual output shaft reducer according to claim 1, characterized in that: The intermediate reduction assembly includes a plurality of intermediate shafts, a plurality of transmission pinions and a plurality of transmission gears. The plurality of intermediate shafts are arranged in the same direction and at intervals. Both ends of each intermediate shaft are rotatably mounted on the two side walls of the box body. At the same time, a transmission pinion and a transmission gear are coaxially mounted on each intermediate shaft. The transmission gear and the transmission pinion on one intermediate shaft are respectively meshed with the driving gear and the transmission gear of another intermediate shaft. The transmission pinion of another intermediate shaft is meshed with the transmission gear on one of the remaining intermediate shafts, until the transmission pinion of the last intermediate shaft is meshed with the driven gear.

3. The concentric dual output shaft reducer according to claim 2, characterized in that: The driving gear and the inner output shaft are an integrated structure, the driven gear and the outer output shaft are an integrated structure, and the intermediate shaft and the transmission pinion are an integrated structure.

4. The concentric dual output shaft reducer according to claim 1, characterized in that: A rotary bearing is arranged between the inner output shaft and the outer output shaft, the inner ring of the rotary bearing is in contact with the outer wall of the inner output shaft, and the outer ring of the rotary bearing is in contact with the hollow inner wall of the outer output shaft.

5. The concentric dual output shaft reducer according to claim 4, characterized in that: A sealing ring is arranged between the inner output shaft and the outer output shaft, and the sealing ring is arranged on a side of the rotating bearing close to the outside of the housing.

6. The concentric dual output shaft reducer according to claim 4, characterized in that: The inner cavity of the box body is filled with cutting fluid, and the box body is provided with a liquid inlet.

7. The concentric dual output shaft reducer according to claim 6, characterized in that: The inner output shaft is a hollow structure, and a plurality of flow holes connecting the outer side and the hollow part are opened on the side wall of the inner output shaft along the radial direction thereof.

8. The concentric dual output shaft reducer according to claim 7, characterized in that: A knife shaft is inserted into the end of the inner output shaft extending out of the box body, and at the same time, a protruding guide limit block is provided on the inner wall of the end of the inner output shaft extending out of the box body along its axial direction, and a concave guide limit groove is provided on the outer wall of the knife shaft along its axial direction; or a concave guide limit groove is provided on the inner wall of the end of the inner output shaft extending out of the box body along its axial direction, and a protruding guide limit block is provided on the outer wall of the knife shaft along its axial direction.

9. The concentric dual output shaft reducer according to claim 8, characterized in that: A plane bearing and a gas spring are also provided in the inner output shaft, one end of the plane bearing abuts against the rotating shaft of the driver connected to the inner output shaft, the other end of the plane bearing abuts against one end of the gas spring, and the other end of the gas spring abuts against one end of the knife shaft extending into the inner output shaft.

10. The concentric dual output shaft reducer according to claim 2, characterized in that: The box body includes a base, two support plates and an intermediate cover plate, the support plates are fixedly installed at both ends of the base, the inner output shaft, the outer output shaft and the intermediate shaft are rotatably installed on the support plates, the intermediate cover plate is arranged between the two support plates, and the two ends of the intermediate cover plate are respectively connected to the two support plates, the bottom of the intermediate cover plate is connected to the base, and the base, the two support plates and the intermediate cover plate surround the inner cavity.

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