阅读说明：本技术 一种模块化双螺杆挤出机用传动箱 (Transmission case for modular double-screw extruder ) 是由 彭超 姜明智 陶玉雪 于 2021-09-27 设计创作，主要内容包括：本发明公开了一种模块化双螺杆挤出机用传动箱,包括减速部分与扭矩分配部分,减速部分包括相互配的上箱体、下箱体以及位于其内的输入轴系和第二轴系,扭矩分配部分包括相互配的左箱体、右箱体以及依次位于其内的上过渡轴系、下过渡轴系、输出轴系A和输出轴系B,所述减速部分与扭矩分配部分组合连接形成动力传递；本发明增加了一根轴系用于分担齿轮箱内部的扭矩传递,提高了传动箱的承载力,将传动箱分割成减速模块与扭矩分配模块,扭矩分配模块可以互换,既能够将上下过渡轴安排在同一个结合面中进行调节装配,又没有破坏到第二轴系的轴承安装孔面,实现大机型箱体体积上的拆分,降低了对机床的加工尺寸的要求。(The invention discloses a transmission case for a modular double-screw extruder, which comprises a speed reduction part and a torque distribution part, wherein the speed reduction part comprises an upper case body and a lower case body which are mutually matched, and an input shaft system and a second shaft system which are arranged in the upper case body and the lower case body; the invention adds a shaft system for sharing torque transmission in the gear box, improves the bearing capacity of the transmission box, divides the transmission box into the speed reduction module and the torque distribution module, and the torque distribution module can be exchanged, so that the upper transition shaft and the lower transition shaft can be arranged in the same joint surface for adjustment and assembly, the bearing mounting hole surface of the second shaft system is not damaged, the size of the large machine tool box is split, and the requirement on the machining size of a machine tool is reduced.)

1. A transmission case for a modular twin-screw extruder is characterized by comprising a speed reduction part and a torque distribution part;

the speed reduction part comprises an upper box body, a lower box body, an input shaft system and a second shaft system, wherein the upper box body and the lower box body are mutually matched;

the torque distribution part comprises a left box body and a right box body which are mutually matched, and an upper transition shafting C, a lower transition shafting D, an output shafting A and an output shafting B which are sequentially arranged in the left box body and the right box body;

the speed reduction part and the torque distribution part are combined and connected to form power transmission, the speed reduction part is fixed inside a transmission case formed by the upper case body and the lower case body through bolts, the torque distribution part is fixed inside a transmission case formed by the left case body and the right case body through bolts, and the two transmission cases are combined into a finished transmission case.

2. The transmission case for the modular twin-screw extruder according to claim 1, wherein the second shaft system comprises a transmission shaft, one end of the transmission shaft is provided with a key, the other end of the transmission shaft is provided with an end cap, a gear is connected with the transmission shaft, a bearing and a bearing are both mounted on the transmission shaft and are respectively positioned at two sides of the gear, a thrust bearing is arranged between the bearing and the end cap, and the second shaft system is connected between the upper case body and the lower case body through a screw after the axial clearance of the second shaft system is adjusted by the end cap.

3. The transmission case for the modular twin-screw extruder according to claim 1, wherein the input shaft system comprises an input gear shaft, an input bearing a and an input bearing B are respectively located at two sides of the gear portion of the gear shaft, an input shaft end cover is arranged at one side of the input gear shaft, a key is arranged at the rear end of the input shaft end cover and connected with the coupler for transmitting torque, and the input shaft system is installed inside the lower case body and then is connected to the lower case body through a screw by adjusting the axial clearance through the input shaft end cover.

4. The transmission case for the modular twin-screw extruder according to claim 1, wherein the upper transition shafting C comprises an upper transition shaft, a gear B and a gear C are respectively arranged at two ends of the upper transition shaft, a bearing C and a bearing D are respectively arranged at two sides of the gear B, and a bearing E and a bearing F are respectively arranged at two sides of the gear C.

5. The transmission case for the modular twin-screw extruder according to claim 1, wherein the lower transition shaft system D comprises a lower transition shaft, a gear D and a gear E are respectively arranged at two ends of the lower transition shaft, a bearing G and a bearing H are respectively arranged at two sides of the gear D, and a bearing I and a bearing J are respectively arranged at two sides of the gear E.

6. The transmission case for the modular twin-screw extruder according to claim 1, wherein the output shaft system B comprises an output shaft B, the front end of the output shaft B has a spline structure, a gear is arranged in the middle of the output shaft B, bearings M and N are respectively arranged on two sides of the gear, a bearing K and a bearing L are respectively arranged on two ends of the output shaft B52, the bearing L is arranged at the front end of the bearing M, and the gear, the gear C and the gear E simultaneously participate in meshing to transmit torque.

7. The transmission case for the modular twin-screw extruder according to claim 1, wherein the output shaft system A comprises an output shaft A, the front end of the output shaft A is provided with a spline structure, the middle end of the output shaft A is provided with a gear, two sides of the output shaft A are respectively provided with a bearing Q and a bearing R, the front end of the bearing Q is provided with a bearing P, the rear end of the bearing R is provided with a tandem thrust bearing, and the gear, the gear B and the gear D are engaged with each other to transmit torque.

8. The transmission case for the modular twin-screw extruder according to claim 1, wherein the left case and the right case are provided with bearing holes, the joint surface of the left case and the right case is a vertical joint surface, the shaft systems in the joint surface are an upper transition shaft system C, an output shaft system B and a lower transition shaft system D from top to bottom, the three shaft systems are balanced with each other, the center distance from the upper transition shaft to the output shaft system B is equal to the center distance from the lower transition shaft to the output shaft system B, and the upper transition shaft system C, the output shaft system B and the lower transition shaft system D are mounted on the left case and the right case through the joint surface and are positioned by the pin holes.

9. The transmission case for the modular twin-screw extruder according to claim 1, wherein the upper case and the lower case are provided with bearing holes, the joint surface of the upper case and the lower case is a horizontal joint surface, the input shaft is mounted in the upper case and the lower case, the second shaft is mounted in the upper case and the lower case, the input shaft and the second shaft are parallel to each other, wherein the gear of the input shaft is meshed with the gear of the second shaft for transmission of torque, the upper case and the lower case are positioned by the pin holes, and the gear of the second shaft is connected to the transmission shaft by a key.

10. The transmission case for the modular twin-screw extruder according to claim 1, wherein the positioning hole at one end of the transmission shaft in the second shaft system in the decelerating section is connected with the output shaft A for positioning in the output shaft system A in the torque distribution section.

Technical Field

The invention relates to a transmission case, in particular to a transmission case for a modular double-screw extruder.

Background

The transmission case is a core part of the parallel twin-screw extruder. Twin screw extruders require an even distribution of torque dynamics to two screws in a restricted space compared to other models. Different torque distribution technologies determine the bearing capacity of the gearbox, and even directly influence the service life and the performance of the whole machine.

The traditional parallel three-shaft torque distribution technology is a mature transmission technology of the double-screw extruder, and the gear box of the foreign double-screw extruder is mostly in the structure at the early stage. Because the center distance is limited, the torque transmitted by the gear on the output shaft is the bottleneck of bearing capacity.

To increase the torque, a bilaterally symmetrical drive structure was developed. An independent transition shaft system is changed into an upper transition shaft system and a lower transition shaft system, and gears on an output shaft are driven from the upper direction and the lower direction. The bearing capacity of the gears on the output shaft is theoretically only 50% of that of the conventional parallel three-shaft type. Meanwhile, as the two transition shafts are symmetrically distributed on the output shaft, the radial force of the output shaft is completely counteracted, an ideal couple drive is formed, and the service life of the output shaft is greatly prolonged.

Because the upper and lower transition shaft CD and the output shaft AB are not on the same plane, the bilateral symmetry driving structure is relatively complex, the assembly difficulty is large, and the manufacturing cost is high. In actual operation, three assembling surfaces exist, and the assembling precision and the assembling efficiency are affected.

The assembly is difficult, and three assembly surfaces are required to be assembled in sequence in the assembly. And the transition shafting AB is not in the same face in the assembling process, so that the uniform loading performance of torque distribution is influenced due to the fact that gear gaps among the shafting are not mastered by an assembler. The technical threshold is high, and the assembly time is long.

The integral box body processing has higher requirements on the processing range of the machine tool. Larger boxes cannot be machined with small machine tools.

At present, the assembling surface of the structure is made into a vertical surface which is integrally opened left and right by a product, the assembling difficulty can be reduced, but the structure can damage the mounting hole surface of the bearing of the output shaft A, so that the stress surface of the bearing is incomplete, and the service life of the bearing is shortened.

Disclosure of Invention

The invention provides a transmission case for a modular double-screw extruder, which is used for overcoming the defects of difficult assembly, high technical threshold and long assembly time of the transmission case in the prior art.

In order to solve the technical problems, the invention provides the following technical scheme:

the invention discloses a transmission case for a modular double-screw extruder, which comprises a speed reduction part and a torque distribution part, wherein the speed reduction part comprises an upper case body, a lower case body, an input shaft system and a second shaft system, wherein the upper case body and the lower case body are mutually matched;

the torque distribution part comprises a left box body and a right box body which are mutually matched, and an upper transition shafting C, a lower transition shafting D, an output shafting A and an output shafting B which are sequentially arranged in the left box body and the right box body;

the speed reduction part and the torque distribution part are combined and connected to form power transmission, the speed reduction part is fixed inside a transmission case formed by the upper case body and the lower case body through bolts, the torque distribution part is fixed inside a transmission case formed by the left case body and the right case body through bolts, and the two transmission cases are combined into a finished transmission case.

Furthermore, the second shaft system comprises a transmission shaft, one end of the transmission shaft is provided with a key, the other end of the transmission shaft is provided with an end cover, the gear is connected with the transmission shaft, a bearing and a bearing are both arranged on the transmission shaft and are respectively positioned on two sides of the gear, a thrust bearing is arranged between the bearing and the end cover, and the second shaft system is connected between the upper box body and the lower box body through screws after the axial clearance is adjusted by the end cover.

Furthermore, the input shaft system comprises an input gear shaft, the input bearing A and the input bearing B are respectively located on two sides of the gear shaft gear part, an input shaft end cover is arranged on one side of the input gear shaft, a key is arranged at the rear end of the input shaft end cover and connected with the coupler for transmitting torque, and the input shaft system is arranged in the lower box body and then is connected to the lower box body through a screw by adjusting the axial gap through the input shaft end cover.

Further, the upper transition shaft system C comprises an upper transition shaft, a gear B and a gear C are arranged at two ends of the upper transition shaft respectively, a bearing C and a bearing D are arranged on two sides of the gear B respectively, and a bearing E and a bearing F are arranged on two sides of the gear C respectively.

Further, lower transition shafting D includes lower transition axle, the both ends of lower transition axle are provided with gear D and gear E respectively, gear D's both sides are equipped with bearing G and bearing H respectively, gear E's both sides are equipped with bearing I and bearing J respectively.

Further, the output shaft system B comprises an output shaft B, the front end of the output shaft B is provided with a spline structure, a gear is arranged in the middle of the output shaft B, two sides of the gear are respectively provided with a bearing M and a bearing N, two ends of the output shaft B52 are respectively provided with a bearing K and a bearing L, the bearing L is located at the front end of the bearing M, and the gear, the gear C and the gear E are simultaneously engaged to transmit torque.

Further, the output shaft system A comprises an output shaft A, the front end of the output shaft A is provided with a spline structure, the middle end of the output shaft A is provided with a gear, two sides of the output shaft A are respectively provided with a bearing Q and a bearing R, the front end of the bearing Q is provided with a bearing P, the rear end of the bearing R is provided with a tandem thrust bearing, and the gear, the gear B and the gear D are simultaneously engaged to transmit torque.

Furthermore, bearing holes are formed in the left box body and the right box body, the junction surface of the left box body and the right box body is a vertical junction surface, shaft systems in the junction surface sequentially include an upper transition shaft system C, an output shaft system B and a lower transition shaft system D from top to bottom, the three shaft systems are balanced with each other, the central distance from the upper transition shaft to the output shaft system B is equal to the central distance from the lower transition shaft to the output shaft system B in value, the upper transition shaft system C, the output shaft system B and the lower transition shaft system D are installed on the left box body and the right box body through the junction surface, and the upper transition shaft system C, the output shaft system B and the lower transition shaft system D are located by the pin holes.

Further, bearing holes are formed in the upper box body and the lower box body, the joint surface of the upper box body and the lower box body is a horizontal joint surface, the input shaft is installed inside the upper box body and the lower box body, the second shaft is installed inside the upper box body and the lower box body, the input shaft and the second shaft are parallel to each other, a gear of the input shaft and a gear in the second shaft are meshed for transmission to transmit torque, the upper box body and the lower box body are positioned through the pin holes, and the gear of the second shaft is connected to the transmission shaft through a key.

Furthermore, a positioning hole at one end of a transmission shaft on the second shaft system in the speed reduction part is connected with an output shaft A used for positioning on an output shaft system A in the torque distribution part in a combined mode.

The invention has the following beneficial effects: compared with the traditional parallel three-shaft structure, the novel parallel three-shaft transmission device has the advantages that one shaft system is added for sharing torque transmission in the gear box, and the bearing capacity of the transmission box is improved.

The transmission box is divided into the speed reducing module and the torque distribution module, and the speed ratio of the transmission box is only related to the speed reducing module, so that the torque distribution module can be interchanged, and the maneuvering flexibility of the production under different speed ratio requirements is increased.

The upper and lower combination structure of the speed reducing module and the left and right combination structure of the torque distribution module can arrange the upper and lower transition shafts in the same combination surface for adjustment and assembly, and the bearing mounting hole surface of the second shaft system is not damaged.

The split of the large machine model box body in volume can be realized, and the requirement on the machining size of a machine tool is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic diagram of the input shaft system of the present invention;

FIG. 3 is a schematic structural view of a second shaft system of the present invention;

FIG. 4 is a schematic view of the upper transition shafting C according to the present invention;

FIG. 5 is a schematic view of the lower transition shafting D according to the present invention;

FIG. 6 is a schematic of the output shafting B of the present invention;

FIG. 7 is a schematic diagram of the output shafting A of the present invention.

In the figure: 1. inputting a shafting; 11. an input bearing A; 12. an input gear shaft; 13. an input bearing B; 14. an input shaft end cover; 15. a key; 2. a second shaft system; 21. a drive shaft; 22. a bearing A; 23. a gear A; 24. a bearing B; 25. a thrust bearing; 26. an end cap; 3. an upper transition shafting C; 31. a bearing C; 32. a gear B; 33. a bearing D; 34. an upper transition shaft; 35. a bearing E; 36. a gear C; 37. a bearing F; 4. a lower transition shafting D; 41. a bearing G; 42. a gear D; 43. a bearing H; 44. a lower transition shaft; 45. a bearing I; 46. a gear E; 47. a bearing J; 5. outputting a shafting B; 51. a bearing K; 52. an output shaft B; 53. a bearing L; 54. a bearing M; 55. a bearing N; 6. outputting a shafting A; 61. a bearing P; 62. a bearing Q; 63. an output shaft A; 64. a bearing R; 65. a tandem thrust bearing; 7. an upper box body; 8. a lower box body; 9. a right box body; 10. and (4) a left box body.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example 1

As shown in fig. 1 to 7, a transmission case for a modular twin-screw extruder includes a speed reduction part and a torque distribution part;

the speed reduction part comprises an upper box body 7, a lower box body 8, an input shaft system 1 and a second shaft system 2 which are mutually matched;

the torque distribution part comprises a left box body 10 and a right box body 9 which are mutually matched, and an upper transition shafting C3, a lower transition shafting D4, an output shafting B5 and an output shafting A6 which are sequentially arranged in the torque distribution part;

the speed reduction part and the torque distribution part are combined and connected to form power transmission, the speed reduction part is fixed inside a transmission box formed by the upper box body 7 and the lower box body 8 through bolts, the torque distribution part is fixed inside a transmission box formed by the left box body 10 and the right box body 9 through bolts, and the two transmission boxes are combined into a finished transmission box.

The second shaft system 2 comprises a transmission shaft 21, one end of the transmission shaft 21 is provided with a key 15, the other end of the transmission shaft 21 is provided with an end cover 26, a gear A23 is connected with the transmission shaft 21, a bearing A22 and a bearing B24 are both mounted on the transmission shaft 21 and are respectively positioned on two sides of the gear A23, a thrust bearing 25 is arranged between the bearing B24 and the end cover 26, and the second shaft system 2 is connected between the upper box body 7 and the lower box body 8 through screws after the axial clearance is adjusted through the end cover 26.

The input shaft system 1 comprises an input gear shaft 12, an input bearing A11 and an input bearing B13 are respectively located on two sides of a gear portion of the gear shaft 12, an input shaft end cover 14 is arranged on one side of the input gear shaft 12, a key 15 is arranged at the rear end of the input shaft end cover 14 and connected with a coupler for transmitting torque, and the input shaft system 1 is installed inside the lower box body 8 and then is connected to the lower box body 8 through screws by adjusting an axial gap through the input shaft end cover 14.

The upper box body 7 and the lower box body 8 are both provided with bearing holes, the junction surface of the upper box body 7 and the lower box body 8 is a horizontal junction surface, the input shaft system 1 is arranged in the upper box body 7 and the lower box body 8, the second shaft system 2 is arranged in the upper box body 7 and the lower box body 8, the input shaft system 1 and the second shaft system 2 are parallel to each other, a gear of the input shaft system 1 and a gear 23 in the second shaft system 2 are meshed for transmission to transmit torque, and the upper box body 7 and the lower box body 8 are positioned by pin holes.

The upper transition shaft system C3 comprises an upper transition shaft 34, two ends of the upper transition shaft 34 are respectively provided with a gear B32 and a gear C36, two sides of the gear B32 are respectively provided with a bearing C31 and a bearing D33, and two sides of the gear C36 are respectively provided with a bearing E35 and a bearing F37.

The lower transition shaft system D4 comprises a lower transition shaft 44, two ends of the lower transition shaft 44 are respectively provided with a gear D42 and a gear E46, two sides of the gear D42 are respectively provided with a bearing G41 and a bearing H43, and two sides of the gear E46 are respectively provided with a bearing I45 and a bearing J47.

Output shaft system B5 includes output shaft B52, output shaft B52 front end has the spline structure, and the centre is equipped with the gear, the both sides of gear are equipped with bearing M54 and bearing N55 respectively, and the both ends of output shaft B52 are equipped with bearing K51 and bearing L53 respectively, bearing L53 is located bearing M54's front end, the gear participates in the meshing transmission moment of torsion with gear C36, gear E46 simultaneously.

The output shaft system A6 comprises an output shaft A63, the front end of the output shaft A63 is provided with a spline structure, the middle end of the output shaft A63 is provided with a gear, two sides of the output shaft A63 are respectively provided with a bearing Q62 and a bearing R64, the front end of the bearing Q62 is provided with a bearing P61, the rear end of the bearing R64 is provided with a tandem thrust bearing 65, and the gear, a gear B32 and a gear D42 are engaged to transmit torque at the same time.

Bearing holes are formed in the left box body 7 and the right box body 8, the combination surface of the left box body 7 and the right box body 8 is a vertical combination surface, shaft systems in the combination surface are an upper transition shaft system C3, an output shaft system B5 and a lower transition shaft system D4 from top to bottom in sequence, the three shaft systems are balanced with each other, the center distance from the upper transition shaft 34 to the output shaft system B5 is equal to the center distance from the lower transition shaft 44 to the output shaft system B5 in numerical value, the upper transition shaft system C3, the output shaft system B5 and the lower transition shaft system D4 are installed on the left box body 7 and the right box body 8 through the combination surface and are positioned by pin holes, and the gear 23A of the second shaft system 2 is connected to the transmission shaft 21 through a key 15.

The positioning hole at one end of the transmission shaft 21 on the second shaft system 2 in the speed reducing part is connected with the output shaft A63 for positioning on the output shaft system A6 in the torque distribution part in a combined mode.

The left box body 7 is provided with a shaft hole of an output shaft system A6, the output shaft system A6 is positioned on the horizontal plane and is parallel to the output shaft system B5, and the output shaft A63 is inserted into the left box body 7 through the shaft hole of the output shaft system A6.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.