A reducer

Abstract

The present application relates to a reducer, which is used in the field of mechanical transmission, including a housing, on which an active unit, a transmission unit and an output unit are rotatably connected, respectively, and the active unit is connected to the output unit through the transmission unit, and the input end of the active unit is connected to the drive unit; wherein the active unit includes a first drive frame and a first drive shaft arranged on the first drive frame, and the first drive frame is provided with a transmission unit; the transmission unit is provided with a first fixed wheel, a first transmission wheel, a second transmission wheel and an output wheel in sequence; the first fixed wheel and the first transmission wheel, the second transmission wheel and the output wheel are respectively connected through a transmission assembly, and the output wheel is provided with an output unit. The technical effects of the present application are: low machining accuracy requirements, reduced possibility of large backlash caused by poor meshing between gear rings, simple and reliable structure while ensuring the operating efficiency of the reducer, and reduced production costs.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical transmission, and in particular to a reducer. Background Art

[0002] A reducer is a mechanical device that is mainly used to reduce the speed of mechanical equipment to meet the working requirements of the equipment.

[0003] Announcement No. CN208831603U discloses a planetary gear reducer, including: a housing, a sun gear assembly, a planetary gear assembly, a planet carrier, an inner ring gear assembly, an output assembly and an input shaft, the sun gear assembly includes a first sun gear and a second sun gear with different pitch circle diameters, and the first sun gear and the second sun gear are distributed in parallel on the same gear shaft.

[0004] During the use of the above-mentioned planetary gear reducer, the machining accuracy of the gear has a direct impact on the backlash. If the meshing between the gear rings is poor, the backlash will be large, reducing the operating efficiency of the reducer. Summary of the invention

[0005] In order to help solve the problem that during the use of a planetary gear reducer, the machining accuracy requirements for gears and gear rings are high, poor meshing will lead to large backlash and reduce operating efficiency, a reducer provided in the present application adopts the following technical scheme: it includes a shell, on which an active unit, a transmission unit and an output unit are rotatably connected respectively, the active unit is connected to the output unit through the transmission unit, and the input end of the active unit is connected to the driving unit; wherein the active unit includes a first driving frame and a first driving shaft arranged on the first driving frame, and the first driving frame is provided with a transmission unit; the transmission unit is provided with a first fixed wheel, a first transmission wheel, a second transmission wheel and an output wheel in sequence; the first fixed wheel and the first transmission wheel, the second transmission wheel and the output wheel are connected respectively through a transmission assembly, and the output wheel is provided with an output unit.

[0006] In a specific possible implementation scheme, the first fixed wheel and the first transmission wheel are arranged on a side of the first drive frame facing the first drive shaft, and the second transmission wheel and the output wheel are arranged on a side of the first drive frame facing away from the first drive shaft, wherein the first transmission wheel and the second transmission wheel are coaxially arranged and rotate synchronously.

[0007] In a specific possible implementation manner, the first driving frame is located between the first transmission wheel and the second transmission wheel.

[0008] In a specific implementation manner, the first fixed wheel and the output wheel are configured as a two-layer or more structure.

[0009] In a specific feasible implementation scheme, the first fixed wheel includes an upper fixed sleeve and a lower fixed sleeve arranged on the shell, and the first driving frame is rotatably connected to the surface of the first fixed wheel, and the upper fixed sleeve and the lower fixed sleeve are located between the third transmission wheel and the first transmission wheel, and the third transmission wheel and the lower fixed sleeve, and the upper fixed sleeve and the first transmission wheel are connected through a transmission assembly.

[0010] In a specific feasible implementation scheme, the output wheel includes an upper output wheel and a lower output wheel rotatably connected to the first drive frame, the first fixed frame is rotatably connected to a fourth transmission wheel on the surface facing away from the first fixed wheel, the lower output wheel is located between the fourth transmission wheel and the second transmission wheel, the second transmission wheel and the lower output wheel, the upper output wheel and the fourth transmission wheel are connected via a transmission assembly, and the third transmission wheel and the fourth transmission wheel are coaxially arranged and rotate synchronously.

[0011] In a specific feasible implementation scheme, a first tensioning structure for adjusting the tension of the transmission assembly belt is provided on the first driving frame, the first tensioning structure includes a cross frame, the first driving shaft is arranged on the cross frame, the output wheel is rotatably connected to the cross frame, a vertical frame is slidably connected to the cross frame, the first transmission wheel and the second transmission wheel are both rotatably connected to the vertical frame, a mounting bolt is passed through and threadedly connected to the vertical frame, an adjustment groove matching the size of the mounting bolt is opened on the cross frame, the mounting bolt is passed through the adjustment groove at one end facing the cross frame, a spring is provided in the adjustment groove, and the spring is pressed between the mounting bolt and the bottom of the adjustment groove.

[0012] In a specific feasible implementation scheme, a first speed change structure for adjusting the pitch diameter of the first fixed wheel is provided on the shell, the first speed change structure includes a left half sleeve and a right half sleeve arranged on the shell, a first tensioning rod is provided on the surface of the left half sleeve facing away from the output wheel, and a second tensioning rod is provided on the surface of the right half sleeve facing away from the output wheel, a first tensioning hole and a second tensioning hole are opened on the shell, which respectively match the first tensioning rod and the second tensioning rod, the first tensioning rod passes through the first tensioning hole and is slidably connected to the first tensioning hole, the second tensioning rod passes through the second tensioning hole and is slidably connected to the second tensioning hole, an adjusting rod is slidably connected to the shell, and an adjusting block is provided on the adjusting rod; when the left half sleeve and the right half sleeve are closed, the adjusting rod is located between the first tensioning rod and the second tensioning rod and is in contact with the first tensioning rod and the second tensioning rod; when there is a gap between the left half sleeve and the right half sleeve, the adjusting block is located between the first tensioning rod and the second tensioning rod and is in contact with the first tensioning rod and the second tensioning rod.

[0013] In a specific possible implementation scheme, the output unit includes an output shaft fixedly arranged on the output wheel, and the output shaft is connected to the housing through a bearing.

[0014] In a specific possible implementation manner, the transmission component is a conveyor belt, a synchronous belt or a transmission chain.

[0015] In a specific possible implementation manner, the driving unit includes a driving motor, and the active unit is arranged at an output end of the driving motor.

[0016] In a specific possible implementation manner, the driving unit includes a permanent magnet arranged on the active unit, and the inner edge of the shell is provided with a stator coil matching the permanent magnet.

[0017] In a specific feasible implementation scheme, a reducer is also disclosed, characterized in that: it includes a shell, on which an active unit, a transmission unit and an output unit are respectively rotatably connected, the active unit is connected to the output unit through the transmission unit, and the input end of the active unit is connected to the driving unit; wherein the active unit includes a third driving frame rotatably connected in the shell, the output unit includes an output ring rotatably connected to the third driving frame, the transmission unit includes a plurality of transmission groups arranged on the third driving frame, and the plurality of transmission groups respectively include a first synchronous wheel and a second synchronous wheel rotatably connected to the third driving frame, the third driving frame is located between the first synchronous wheel and the second synchronous wheel, the first synchronous wheel and the second synchronous wheel are coaxially arranged and rotate synchronously, a first conveyor belt is tightly wound between a plurality of first synchronous wheels located on the same side of the output ring, a second conveyor belt is tightly wound between a plurality of second synchronous wheels located on the same side of the output ring, and an outer edge of the output ring is in contact with the first conveyor belt and the second conveyor belt, respectively.

[0018] In summary, this application has at least the following beneficial technical effects:

[0019] (1) The components of the transmission unit adopt conventional low-precision structures. Compared with conventional planetary gear reducers, harmonic reducers and cycloid reducers, the processing accuracy requirements are low, which reduces the possibility of large backlash caused by poor meshing between gear rings. While ensuring the operating efficiency of the reducer, the structure is simple and reliable, reducing production costs.

[0020] (2) Different transmission components can be adapted according to actual conditions.

[0021] (3) The belt drive characteristics of the transmission component are utilized to achieve low operating noise, meeting the needs of low-noise use occasions such as inside a car. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0023] Figure 2 It is a schematic diagram of the structure of the first transmission wheel in the first embodiment of the present application.

[0024] Figure 3 It is a structural diagram used to reflect the left half set in Example 1 of the present application.

[0025] Figure 4 It is a structural schematic diagram used to reflect the horizontal frame in Example 1 of the present application.

[0026] Figure 5 It is a schematic diagram of the overall structure of Example 6 of the present application.

[0027] Figure 6 It is a structural schematic diagram used to embody the first synchronization wheel in the sixth embodiment of the present application.

[0028] 1. the first transmission wheel; 2. the second transmission wheel; 3. the third transmission wheel; 4. the fourth transmission wheel; 5. the first synchronous wheel; 6. the first transmission belt; 7. the second synchronous wheel; 8. the second transmission belt; 9. the output shaft; 10. the bearing; 11. the third transmission wheel; 12. the output ring; 13. the lower output wheel; 14. the fourth transmission wheel; 15. the first synchronous wheel; 16. the first conveyor belt; 17. the second synchronous wheel; 18. the second conveyor belt; 19. the placement hole; 20. the left half sleeve; 21. the right half sleeve; 22. the first tensioning rod; 23. the second tensioning rod; 24. the first tensioning hole; 25. the second tensioning hole; 26. the adjusting rod; 27. the adjusting block; 28. the horizontal frame; 29. ​​the vertical frame; 30. the mounting bolt; 31. the upper fixing sleeve; 32. the lower fixing sleeve; 33. the third transmission wheel; 34. the upper output wheel. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-6 This application is described in further detail.

[0030] The embodiment of the present application discloses a reducer.

[0031] Embodiment 1

[0032] Reference Figure 1 The reducer includes a housing 1, on which a driving unit and an output unit are rotatably connected, respectively. The driving unit is connected to the output unit through a transmission unit, and further includes a driving unit for driving the driving unit to rotate, and the driving unit is connected to the input end of the driving unit; when the driving unit is started, the speed of the driving unit is greater than the speed of the output unit. Therefore, the driving unit is started to drive the active unit to rotate in the housing 1, and the transmission unit is used to reduce the output speed of the output unit.

[0033] Reference Figure 1 and Figure 2The active unit includes a first drive frame 2 rotatably connected to the housing 1, a first drive column 3 is fixedly connected to the first drive frame 2, and in the embodiment of the present application, the first drive column 3 is located at the center of the housing 1. The drive unit includes a drive motor disposed outside the housing 1, and the first drive column 3 is disposed at the output end of the drive motor. Therefore, starting the drive motor drives the first drive column 3 at the output end of the drive motor to rotate, thereby driving the first drive frame 2 to revolve along the central axis of the housing 1.

[0034] Reference Figure 1 and Figure 2 The transmission unit includes a first fixed wheel 4 arranged on the housing 1, a plurality of external teeth 5 are arranged on the outer edge of the first fixed wheel 4, a first driving column 3 passes through the first fixed wheel 4 and is rotatably connected to the first fixed wheel 4, a first transmission wheel 6 is rotatably connected to the surface of the first driving frame 2 facing the first fixed wheel 4 through a bearing, a first synchronous belt is tightly wound between the first transmission wheel 6 and the first fixed wheel 4, a second transmission wheel 7 and an output wheel 8 are rotatably connected to the surface of the first driving frame 2 away from the first fixed wheel 4 through bearings, a second synchronous belt is tightly wound between the output wheel 8 and the second transmission wheel 7, the first transmission wheel 6 and the second transmission wheel 7 are coaxially arranged and rotate synchronously, and the output unit is arranged on the output wheel 8. In the embodiment of the present application, the transmission assembly adopts the first synchronous belt and the second synchronous belt, and the first synchronous belt and the second synchronous belt can adopt conventional synchronous belt drive, and can also be set as various types of belt drive such as double-sided synchronous belt drive, V-belt drive, flat belt drive, etc. according to actual conditions.

[0035] Therefore, the first transmission wheel 6 and the second transmission wheel 7 are driven by the first driving frame 2 to revolve along the central axis of the shell 1, so that the first transmission wheel 6 rotates under the drive of the first synchronous belt, and the second transmission wheel 7 rotates synchronously under the drive of the second synchronous belt, while the output wheel 8 and the first driving frame 2 rotate relatively. By setting the pitch circle diameters of the first fixed wheel 4, the first transmission wheel 6, the second transmission wheel 7 and the output wheel 8, a difference in rotation speed is generated between the output unit and the input, thereby achieving the purpose of deceleration.

[0036] Among them, the rotation speed of the first driving frame 2 is n1, the pitch circle diameter of the first fixed wheel 4 is d1, the pitch circle diameter of the first transmission wheel 6 is d2, the pitch circle diameter of the second transmission wheel 7 is d3, the pitch circle diameter of the output wheel 8 is d4, and the rotation speed of the output wheel 8 relative to the housing 1 is n1*d1*d3 / (d2*d4)-n1. By using the reduction ratio calculation formula and setting d1, d3, d2, and d4, when d1*d3 is close to d2*d4, a large reduction ratio of the reducer can be achieved.

[0037] In addition, the various components of the transmission unit in the embodiment of the present application adopt a conventional low-precision structure. Compared with conventional planetary gear reducers, harmonic reducers and cycloid reducers, the processing accuracy requirements are low, which reduces the possibility that poor meshing between gear rings will lead to large backlash, ensures the operating efficiency of the reducer while having a simple and reliable structure, and does not require a load-balancing mechanism, thereby reducing production costs; utilizing the belt transmission characteristics of the first synchronous belt and the second synchronous belt, the operating noise is low, meeting the needs of low-noise use occasions such as automobile interiors; since the first fixed wheel 4 is installed on the housing 1, the position of the first fixed wheel 4 is fixed, which improves the convenience of adjusting the pitch circle diameter of the first fixed wheel 4, thereby facilitating the adjustment of the reduction ratio of the reducer.

[0038] Reference Figure 3 A first speed change structure for adjusting the pitch diameter of the first fixed wheel 4 is provided on the housing 1. The first fixed wheel 4 includes a left half sleeve 20 and a right half sleeve 21 provided on the housing 1. A first tensioning rod 22 is fixedly connected to the surface of the left half sleeve 20 facing away from the output wheel 8, and a second tensioning rod 23 is fixedly connected to the surface of the right half sleeve 21 facing away from the output wheel 8. A first tensioning hole 24 and a second tensioning hole 25 matching the first tensioning rod 22 and the second tensioning rod 23 are provided at the bottom of the housing 1. The first tensioning rod 22 passes through the first tensioning hole 24 and is slidably connected to the first tensioning hole 24. The second tensioning rod 23 passes through the second tensioning hole 25 and is slidably connected to the second tensioning hole 25. An adjusting rod 26 is slidably connected to the housing 1, and an adjusting block 27 is fixedly connected to the adjusting rod 26. In the embodiment of the present application, the first tensioning rod 22 and the second tensioning rod 23 have the same size, the width of the first tensioning hole 24 is the same as the width of the first tensioning rod 22 , and the length of the first tensioning hole 24 is greater than the length of the first tensioning rod 22 .

[0039] Therefore, when there is a gap between the left half sleeve 20 and the right half sleeve 21, that is, when the first fixed wheel 4 is in a split state, the adjustment block 27 is located between the first tensioning rod 22 and the second tensioning rod 23, and the first tensioning rod 22 and the second tensioning rod 23 are in contact with each other under the action of the first synchronous belt; when the left half sleeve 20 and the right half sleeve 21 are closed, that is, when the first fixed wheel 4 is in a closed state, the adjustment rod 26 is located between the first tensioning rod 22 and the second tensioning rod 23, and the first tensioning rod 22 and the second tensioning rod 23 are in contact with each other under the action of the first synchronous belt; by adjusting the different states of the first fixed wheel 4, the circumference of the first fixed wheel 4 can be adjusted, which is convenient for adjusting the transmission ratio during the operation of the reducer.

[0040] Reference Figure 4A first tensioning structure for adjusting the tension of the first synchronous belt and the second synchronous belt is provided on the first driving frame 2. The first tensioning structure includes a cross frame 28. The first driving column 3 is fixedly arranged on the cross frame 28. The output wheel 8 is rotatably connected to the cross frame 28. A vertical frame 29 is slidably connected to the cross frame 28. The first transmission wheel 6 and the second transmission wheel 7 are both rotatably connected to the vertical frame 29. A mounting bolt 30 is penetrated and threadedly connected on the vertical frame 29. An adjustment groove matching the size of the mounting bolt 30 is opened on the cross frame 28. The mounting bolt 30 is penetrated in the adjustment groove at one end facing the cross frame 28. A spring is placed in the adjustment groove, and the spring is pressed between the mounting bolt 30 and the bottom of the adjustment groove. Therefore, the operator adjusts the position between the vertical frame 29 and the horizontal frame 28, and the compressed spring provides a reaction force to the mounting bolt 30. At the same time, the first synchronous belt applies a force to the first transmission wheel 6. The two interact with each other to adjust the distance between the first transmission wheel 6 and the first fixed wheel 4, thereby achieving adjustable tension of the first synchronous belt wrapped around the outer edges of the first transmission wheel 6 and the first fixed wheel 4, eliminating the backlash of the belt drive, and improving the transmission accuracy and operating efficiency of the reducer.

[0041] Reference Figure 1 and Figure 2 The output unit includes an output shaft 9 fixedly arranged on the output wheel 8. The output shaft 9 in the embodiment of the present application is coaxially arranged with the first driving column 3. The output shaft 9 is connected to the housing 1 through a bearing 10. The bearing 10 supports the output shaft 9, improves the stability of the output shaft 9 during rotation, and the bearing 10 can withstand the force and torque from the output shaft 9, ensuring the continuity of power transmission. It can also reduce the friction and wear between the output shaft 9 and the housing 1, extend the service life of the reducer, and reduce the heat and energy loss generated by friction.

[0042] The implementation principle of the embodiment of the present application is as follows: starting the driving motor drives the first driving column 3 at the output end of the driving motor to rotate, thereby driving the first driving frame 2 to revolve along the central axis of the shell 1, and the first transmission wheel 6 and the second transmission wheel 7 revolve along the central axis of the shell 1 driven by the first driving frame 2, so that the first transmission wheel 6 rotates under the drive of the first synchronous belt, and the second transmission wheel 7 rotates synchronously under the drive of the second synchronous belt, while the output wheel 8 rotates relative to the first driving frame 2, and by setting the pitch circle diameters of the first fixed wheel 4, the first transmission wheel 6, the second transmission wheel 7 and the output wheel 8, a difference in rotation speed is generated between the output unit and the input, thereby achieving the purpose of deceleration.

[0043] Embodiment 2

[0044] Reference Figure 4, the difference between the second embodiment of the present application and the first embodiment is that the first fixed wheel 4 and the output wheel 8 can be set as a two-layer or more structure. The two-layer structure is used as an example for explanation in the embodiment of the present application. The two-layer or more structure can be set with reference to the two-layer structure and actual conditions. The first fixed wheel 4 includes an upper fixed sleeve 31 and a lower fixed sleeve 32 arranged on the shell 1. In the embodiment of the present application, the upper fixed sleeve 31 and the lower fixed sleeve 32 are coaxially arranged and have the same size. The first drive frame 2 is rotatably connected to the surface of the first fixed wheel 4. The upper fixed sleeve 31 and the lower fixed sleeve 32 are both located between the third transmission wheel 33 and the first transmission wheel 6. A third synchronous belt is tightly wound between the third transmission wheel 33 and the lower fixed sleeve 32. The first synchronous belt is tightly wound between the first transmission wheel 6 and the upper fixed sleeve 31. The output wheel 8 includes a rotating connection The upper output wheel 34 and the lower output wheel 13 are connected to the first drive frame 2. In the embodiment of the present application, the upper output wheel 34 and the lower output wheel 13 are coaxially arranged and have the same size. The fourth transmission wheel 14 is rotatably connected to the surface of the first fixed frame away from the first fixed wheel 4. The lower output wheel 13 is located between the fourth transmission wheel 14 and the second transmission wheel 7. The second synchronous belt is tightly wound between the second transmission wheel 7 and the lower output wheel 13. The fourth synchronous belt is tightly wound between the fourth transmission wheel 14 and the upper output wheel 34. The third transmission wheel 33 and the fourth transmission wheel 14 are coaxially arranged and rotate synchronously.

[0045] Therefore, the driving unit is started to drive the first driving column 3 at the output end of the driving unit to rotate, thereby driving the first driving frame 2 to revolve along the central axis of the shell 1. The first transmission wheel 6, the second transmission wheel 7, the third transmission wheel 33 and the fourth transmission wheel 14 revolve along the central axis of the shell 1 under the drive of the first driving frame 2, so that the first transmission wheel 6 rotates under the drive of the first synchronous belt, the second transmission wheel 7 rotates synchronously under the drive of the second synchronous belt, the third transmission wheel 33 rotates under the drive of the third synchronous belt, and the fourth transmission wheel 14 rotates under the drive of the fourth synchronous belt. At the same time, the output wheel 8 rotates relative to the first driving frame 2. By setting the pitch circle diameter, a difference in rotation speed is generated between the output unit and the input, so as to achieve the purpose of deceleration. Arranging multiple transmission wheels is convenient for balancing the center of gravity of the first driving frame 2, sharing the load, and further improving the stability and efficiency of the reducer during operation.

[0046] Embodiment 3

[0047] Reference Figure 1 and Figure 2The difference between the third embodiment of the present application and the first embodiment is that the driving unit includes a permanent magnet disposed on the active unit, and a stator coil matching the permanent magnet is disposed on the inner edge of the housing 1. Therefore, when current passes through the stator coil, a magnetic field is generated around the stator coil according to the principle of electromagnetic induction, and the magnetic field of the permanent magnet interacts with the magnetic field generated by the stator coil, thereby driving the active unit to rotate.

[0048] Embodiment 4

[0049] Reference Figure 1 and Figure 2 , the fourth embodiment of the present application is different from the first embodiment in that the active unit includes a second drive frame rotatably connected to the housing 1, the second drive frame is fixedly connected to the second drive column, the second drive column in the embodiment of the present application is located at the center of the housing 1, the transmission unit includes a second fixed sleeve arranged on the housing 1, the outer edge of the second fixed sleeve is provided with a plurality of sprocket teeth, the second drive column passes through the second fixed sleeve and is rotatably connected to the second fixed sleeve, the second drive frame is rotatably connected to the first sprocket on the surface facing the second fixed sleeve, the first chain is tightly wound between the first sprocket and the second fixed sleeve, the second drive frame is rotatably connected to the second sprocket and the output sprocket on the surface away from the second fixed sleeve, the second chain is tightly wound between the output sprocket and the second sprocket, the first sprocket and the second sprocket are coaxially arranged and rotate synchronously, and the output unit is arranged on the output sprocket. The second drive frame is provided with a second tensioning structure for adjusting the tension of the first chain and the second chain, the housing 1 is provided with a second speed change structure for adjusting the pitch diameter of the second fixed sleeve, the second tensioning structure can be set with reference to the first tensioning structure, and the second speed change structure can be set with reference to the first speed change structure. The first chain and the second chain in the embodiment of the present application can adopt conventional toothed chain transmission, and can also be set to various types of chain transmission such as roller chain transmission and chain transmission according to actual conditions.

[0050] Therefore, the driving unit is started, and the driving unit drives the second driving frame to revolve along the central axis of the shell 1. The first sprocket and the second sprocket revolve along the central axis of the shell 1 driven by the second driving frame, so that the first sprocket rotates under the drive of the first chain, and the second sprocket rotates synchronously under the drive of the second chain. At the same time, the output sprocket and the second driving frame rotate relatively. By setting the pitch circle diameters of the second fixed sleeve, the first sprocket, the second sprocket and the output sprocket, a difference in rotation speed is made between the output unit and the input, thereby achieving the purpose of deceleration.

[0051] Embodiment 5

[0052] Reference Figure 1 and Figure 2, the sixth embodiment of the present application is different from the first embodiment in that the active unit includes a fourth drive frame rotatably connected to the housing 1, the fourth drive frame is provided with a third drive column, the transmission unit includes a third fixed sleeve arranged on the housing 1, the third drive column is rotatably connected to the third fixed sleeve, the fourth drive frame is rotatably connected to the first pulley, the first belt is tightly wound between the first pulley and the third fixed sleeve, the fourth drive frame is respectively rotatably connected to the second pulley and the output pulley, the second belt is tightly wound between the output pulley and the second pulley, the first pulley and the second pulley are coaxially arranged and rotate synchronously, and the output unit is arranged on the output pulley. The fourth drive frame is provided with a third tensioning structure for adjusting the tension of the first belt and the second belt, the housing 1 is provided with a third speed change structure for adjusting the pitch diameter of the third fixed sleeve, the third tensioning structure in the embodiment of the present application can be set with reference to the first tensioning structure, and the third speed change structure can be set with reference to the first speed change structure.

[0053] Therefore, the driving unit is started, and the driving unit drives the fourth driving frame to revolve along the central axis of the housing 1. The first pulley and the second pulley revolve along the central axis of the housing 1 under the drive of the fourth driving frame, so that the first pulley rotates under the drive of the first belt, and the second pulley rotates synchronously under the drive of the second belt, while the output pulley and the fourth driving frame rotate relative to each other. By setting the pitch diameters of the third fixed sleeve, the first pulley, the second pulley and the output pulley, the speed of the output unit is different from that of the input, so as to achieve the purpose of deceleration.

[0054] Embodiment 6

[0055] Reference Figure 5 and Figure 6The present application further discloses a reducer, wherein the active unit comprises a third drive frame 11 rotatably connected to the housing 1, the output unit comprises an output ring 12 rotatably connected to the third drive frame 11, the transmission unit comprises a plurality of transmission groups arranged on the third drive frame 11, and in the embodiment of the present application, the number of transmission groups is set to six groups, and three groups are respectively arranged on both sides of the output ring 12, each transmission group respectively comprises a first synchronous wheel 15 and a second synchronous wheel 17 rotatably connected to the third drive frame 11, the third drive frame 11 is located between the first synchronous wheel 15 and the second synchronous wheel 17, the first synchronous wheel 15 and the second synchronous wheel 17 are respectively coaxially arranged and rotate synchronously, a first conveyor belt 16 is respectively tightly wound between the three first synchronous wheels 15 located on the same side of the output ring 12, a second conveyor belt 18 is respectively tightly wound between the three second synchronous wheels 17 located on the same side of the output ring 12, the output ring 12 is located between the two first conveyor belts 16, and the outer edge of the output ring 12 is in contact with the two first conveyor belts 16 and the two second conveyor belts 18 respectively. In the embodiment of the present application, several transmission groups are evenly distributed on the third drive frame 11, so as to balance the center of gravity of the third drive frame 11, distribute the load, and improve the stability of the reducer during operation. In addition, the active unit in the embodiment of the present application can select the first drive frame 2 or the third drive frame 11 according to actual conditions, and the transmission unit can correspondingly adopt the first fixed wheel 4, the first transmission wheel 6, the second transmission wheel 7 and the output wheel 8 or the transmission group.

[0056] Therefore, the driving unit is started, and the driving unit drives the third driving frame 11 to revolve along the central axis of the shell 1. The first synchronous wheel 15 and the second synchronous wheel 17 revolve along the central axis of the shell 1 under the drive of the third driving frame 11, so that the second synchronous wheel 17 rotates under the drive of the first conveyor belt 16. When the first synchronous wheel 15 rotates synchronously under the drive of the first conveyor belt 16, the output ring 12 and the third driving frame 11 rotate relatively. By setting the first synchronous wheel 15, the second synchronous wheel 17 and the output ring 12, a difference in rotation speed is generated between the output unit and the input, thereby achieving the purpose of deceleration.

[0057] Reference Figure 5 and Figure 6 A placement hole 19 is provided at the center of the third drive frame 11, and the placement hole 19 and the inner edge of the output ring 12 are coaxially arranged, so that the center of the third drive frame 11 and the output ring 12 is hollow, which solves the problem that the conventional planetary gear reducer needs to be routed around the reducer, resulting in poor line aesthetics. In the embodiment of the present application, space is reserved for the pipeline layout of the manipulator, and the line of the manipulator can be passed through the placement hole 19, which improves the aesthetics of the routing and facilitates the operator to lay the wires.

[0058] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A reducer, characterized in that: It comprises a housing (1), to which a driving unit, a transmission unit and an output unit are rotatably connected respectively, the driving unit is connected to the output unit via the transmission unit, and the input end of the driving unit is connected to the driving unit; The active unit comprises a first drive frame (2) and a first drive shaft (3) arranged on the first drive frame (2), and a transmission unit is arranged on the first drive frame (2); The transmission unit is provided with a first fixed wheel (4), a first transmission wheel (6), a second transmission wheel (7) and an output wheel (8) in sequence; the first fixed wheel (4) and the first transmission wheel (6), the second transmission wheel (7) and the output wheel (8) are respectively connected through a transmission assembly, and the output wheel (8) is provided with an output unit.

2. The reducer according to claim 1, characterized in that: The first fixed wheel (4) and the first transmission wheel (6) are arranged on a side of the first drive frame (2) facing the first drive shaft (3), and the second transmission wheel (7) and the output wheel (8) are arranged on a side of the first drive frame (2) facing away from the first drive shaft (3), wherein the first transmission wheel (6) and the second transmission wheel (7) are coaxially arranged and rotate synchronously.

3. The reducer according to claim 2, characterized in that: The first driving frame (2) is located between the first transmission wheel (6) and the second transmission wheel (7).

4. The reducer according to claim 1, characterized in that: The first fixed wheel (4) and the output wheel (8) are arranged as a structure with two or more layers.

5. The reducer according to claim 4, characterized in that: The first fixed wheel (4) comprises an upper fixed sleeve (31) and a lower fixed sleeve (32) arranged on the housing (1); the first drive frame (2) is rotatably connected to a third transmission wheel (33) on a surface facing the first fixed wheel (4); the upper fixed sleeve (31) and the lower fixed sleeve (32) are both located between the third transmission wheel (33) and the first transmission wheel (6); the third transmission wheel (33) and the lower fixed sleeve (32), the upper fixed sleeve (31) and the first transmission wheel (6) are connected via a transmission assembly.

6. The reducer according to claim 5, characterized in that: The output wheel (8) comprises an upper output wheel (34) and a lower output wheel (13) rotatably connected to the first driving frame (2); a fourth transmission wheel (14) is rotatably connected to the surface of the first fixed frame away from the first fixed wheel (4); the lower output wheel (13) is located between the fourth transmission wheel (14) and the second transmission wheel (7); the second transmission wheel (7) and the lower output wheel (13), the upper output wheel (34) and the fourth transmission wheel (14) are connected via a transmission assembly; the third transmission wheel (33) and the fourth transmission wheel (14) are coaxially arranged and rotate synchronously.

7. The reducer according to claim 1, characterized in that: The first drive frame (2) is provided with a first tensioning structure for adjusting the tension of the transmission assembly belt, the first tensioning structure comprises a cross frame (28), the first drive shaft (3) is arranged on the cross frame (28), the output wheel (8) is rotatably connected to the cross frame (28), a vertical frame (29) is slidably connected to the cross frame (28), the first transmission wheel (6) and the second transmission wheel (7) are both rotatably connected to the vertical frame (29), a mounting bolt (30) is passed through and threadedly connected to the vertical frame (29), an adjustment groove matching the size of the mounting bolt (30) is opened on the cross frame (28), one end of the mounting bolt (30) facing the cross frame (28) is passed through the adjustment groove, a spring is arranged in the adjustment groove, and the spring is pressed between the mounting bolt (30) and the bottom of the adjustment groove.

8. The reducer according to claim 1, characterized in that: The housing (1) is provided with a first speed change structure for adjusting the pitch diameter of the first fixed wheel (4), the first speed change structure comprising a left half sleeve (20) and a right half sleeve (21) arranged on the housing (1), a first tensioning rod (22) being provided on a surface of the left half sleeve (20) facing away from the output wheel (8), a second tensioning rod (23) being provided on a surface of the right half sleeve (21) facing away from the output wheel (8), a first tensioning hole (24) and a second tensioning hole (25) being provided on the housing (1) and matching with the first tensioning rod (22) and the second tensioning rod (23) respectively, the first tensioning rod (22) passing through the first tensioning hole (24) and being slidably connected with the first tensioning hole (24), the second tensioning rod (25) being provided on the housing (1) and the first tensioning rod (22) passing through the first tensioning hole (24) and being slidably connected with the first tensioning hole (24), (23) passes through the second tensioning hole (25) and is slidably connected to the second tensioning hole (25); an adjusting rod (26) is slidably connected to the shell (1), and an adjusting block (27) is provided on the adjusting rod (26); when the left half sleeve (20) and the right half sleeve (21) are closed, the adjusting rod (26) is located between the first tensioning rod (22) and the second tensioning rod (23) and is in contact with the first tensioning rod (22) and the second tensioning rod (23); when there is a gap between the left half sleeve (20) and the right half sleeve (21), the adjusting block (27) is located between the first tensioning rod (22) and the second tensioning rod (23) and is in contact with the first tensioning rod (22) and the second tensioning rod (23).

9. The reducer according to claim 1, characterized in that: The output unit comprises an output shaft (9) fixedly arranged on an output wheel (8); the output shaft (9) is connected to the housing (1) via a bearing (10).

10. The reducer according to claim 1, characterized in that: The transmission component is a conveyor belt, a synchronous belt or a transmission chain.

11. The reducer according to claim 1, characterized in that: The driving unit comprises a driving motor, and the active unit is arranged at the output end of the driving motor.

12. The reducer according to claim 1, characterized in that: The driving unit comprises a permanent magnet arranged on the active unit, and the inner edge of the shell (1) is provided with a stator coil matching the permanent magnet.

13. A reducer, characterized in that: It comprises a housing (1), to which a driving unit, a transmission unit and an output unit are rotatably connected respectively, the driving unit is connected to the output unit via the transmission unit, and the input end of the driving unit is connected to the driving unit; The active unit comprises a third drive frame (11) rotatably connected in the housing (1), the output unit comprises an output ring (12) rotatably connected to the third drive frame (11), the transmission unit comprises a plurality of transmission groups arranged on the third drive frame (11), the plurality of transmission groups respectively comprising a first synchronous wheel (15) and a second synchronous wheel (17) rotatably connected to the third drive frame (11), the third drive frame (11) is located between the first synchronous wheel (15) and the second synchronous wheel (17), the first synchronous wheel (15) and the second synchronous wheel (17) are coaxially arranged and rotate synchronously, a first conveyor belt (16) is tightly wound between the plurality of first synchronous wheels (15) located on the same side of the output ring (12), a second conveyor belt (18) is tightly wound between the plurality of second synchronous wheels (17) located on the same side of the output ring (12), and an outer edge of the output ring (12) is in contact with the first conveyor belt (16) and the second conveyor belt (18) respectively.

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