Gearbox of counter-rotating three-screw extruder

Abstract

The utility model discloses a gear box of an incongruous three-screw extruder, which comprises an upper box body, a lower box body, a middle shaft, a left shaft, a right shaft, an input shaft, a middle shaft main gear, a middle shaft auxiliary gear, an input gear, two middle gear shaft components and two meshing gear sets, an inner cavity is formed in the box body, the middle shaft, the left shaft and the right shaft are rotationally arranged in the inner cavity, the left ends of the middle shaft, the left shaft and the right shaft extend into the box body, the middle shaft main gear and the middle shaft auxiliary gear are fixed to the right end of the middle shaft, the input shaft is rotationally arranged in the inner cavity, and the right end of the input shaft penetrates through the right side of the box body. And the input gear is fixed at the left end of the input shaft. According to the gear box of the incongruous three-screw extruder, synchronous incongruous rotation of the three output shafts can be achieved, it is guaranteed that the rotating speeds of the three shafts are the same, the output precision of the gear box is effectively improved, and precision and smoothness of power transmission are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of extruder technology, specifically to a gearbox for a counter-rotating three-screw extruder. Background Technology

[0002] In the film production field, three-screw extruders are commonly used extrusion equipment, requiring a corresponding gearbox to drive the three screws. Most existing three-screw extruder gearboxes use a common twin-screw extruder gearbox combined with a meshing gear set. Patent ZL202122108565.X discloses a gearbox for a counter-rotating twin-screw extruder, including an input shaft, a transition shaft driven by the input shaft, a first output shaft driven by the transition shaft, and a second output shaft driven by the first output shaft; the first and second output shafts are arranged in parallel, and the input shaft and the transition shaft are driven by gears; the first and second output shafts are driven by a helical gear assembly. While this gearbox and meshing gear set can meet the requirements to a certain extent, its disadvantages are: unstable output and insufficient precision. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a gearbox for a counter-rotating three-screw extruder.

[0004] The technical solution of this utility model is as follows:

[0005] A gearbox for a counter-rotating three-screw extruder includes an upper housing, a lower housing, a central shaft, a left shaft, a right shaft, an input shaft, a central shaft main gear, a central shaft secondary gear, an input gear, two intermediate gear shaft assemblies, and two meshing gear sets. The upper housing is fixed to the lower housing and together forms a housing. The housing has an inner cavity. The central shaft, the left shaft, and the right shaft are rotatably disposed within the inner cavity, with their left ends extending into the housing. The central shaft main gear and the central shaft secondary gear are fixed to the right end of the central shaft. The input shaft is rotatably disposed within the inner cavity, with its right end passing through the right side of the housing. The input gear is fixed to the left end of the input shaft and meshes with the central shaft main gear. The two meshing gear sets are installed within the inner cavity, with their output ends fixed to the left and right shafts, respectively. The two intermediate gear shaft assemblies are installed within the inner cavity, with their input ends meshing with the central shaft secondary gear and their output ends meshing with the input ends of the two meshing gear sets.

[0006] Preferably, the intermediate gear shaft assembly includes a drive shaft, a first gear, and a second gear. The drive shaft is rotatably mounted in the inner cavity. The first gear is mounted on the right end of the drive shaft and meshes with the central shaft auxiliary gear. The second gear is mounted on the left end of the drive shaft and meshes with the input end of the meshing gear set.

[0007] Preferably, the meshing gear set includes a third gear and a fourth gear, the third gear of the two meshing gear sets is respectively mounted on the left shaft and the right shaft, and the fourth gear is rotatably mounted in the inner cavity and meshes with the third gear and the second gear.

[0008] Preferably, bearings are fitted at both ends of the drive shaft, and the bearings are installed inside the inner cavity.

[0009] Preferably, the two central shaft gear assemblies are located on both sides of the central shaft.

[0010] Preferably, the central axis, the left axis, and the right axis are located on the same horizontal plane.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the gearbox of the counter-rotating three-screw extruder of this utility model can realize the synchronous counter-rotating of the three output shafts, ensuring that the three shafts rotate at the same speed, effectively improving the output accuracy of the gearbox, and ensuring the accuracy, smoothness and stability of power transmission. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the gearbox of the counter-rotating three-screw extruder of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the gearbox of the counter-rotating three-screw extruder of this utility model;

[0015] Figure 3 This is a schematic diagram of the three-axis transmission structure of this utility model;

[0016] Among them, 1-upper housing, 2-lower housing, 3-central shaft, 4-left shaft, 5-right shaft, 6-input shaft, 7-central shaft main gear, 8-central shaft auxiliary gear, 9-input gear, 10-intermediate gear shaft assembly, 11-meshing gear set, 12-housing housing, 13-inner cavity, 101-drive shaft, 102-first gear, 103-second gear, 104-bearing, 111-third bearing, 112-fourth bearing. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0019] Example 1

[0020] like Figures 1 to 3 As shown, the gearbox of the counter-rotating three-screw extruder in this embodiment includes an upper housing 1, a lower housing 2, a central shaft 3, a left shaft 4, a right shaft 5, an input shaft 6, a central shaft main gear 7, a central shaft secondary gear 8, an input gear 9, two intermediate gear shaft assemblies 10, and two meshing gear sets 11. The upper housing 1 is fixed to the lower housing 2 and together with the lower housing 2 forms a housing 12. The housing has an inner cavity 13. The central shaft 3, the left shaft 4, and the right shaft 5 are rotatably disposed within the inner cavity 13, with their left ends extending into the housing 12. The central shaft main gear 7 and the... The central shaft auxiliary gear 8 is fixed to the right end of the central shaft 3. The input shaft 6 is rotatably disposed within the inner cavity 13, with its right end passing through the right side of the housing 12. The input gear 9 is fixed to the left end of the input shaft 6 and meshes with the central shaft main gear 7. Two meshing gear sets 11 are installed within the inner cavity, with their output ends fixed to the left shaft 4 and the right shaft 5, respectively. Two intermediate gear shaft assemblies 10 are installed within the inner cavity 13, with their input ends meshing with the central shaft auxiliary gear 8 and their output ends meshing with the input ends of the two meshing gear sets 11. During operation, the motor drives the input shaft 6 to rotate, and the rotary gear 9 on the input shaft 6 rotates accordingly, driving the central shaft main gear 7 to rotate. The central shaft main gear 7 drives the central shaft auxiliary gear 8 to rotate, causing the central shaft 3 to rotate. Simultaneously, the rotation of the central shaft auxiliary gear 8, through the two intermediate shaft assemblies 10 and the two meshing gear sets 11, causes the left shaft 4 and the right shaft 5 to rotate in opposite directions, thus achieving three-axis opposite-direction rotation. The gearbox of the counter-rotating three-screw extruder in this embodiment can realize synchronous counter-rotation of the three output shafts, ensuring that the three shafts rotate at the same speed, effectively improving the output accuracy of the gearbox, and ensuring accurate and smooth power transmission.

[0021] In this embodiment, the intermediate gear shaft assembly 10 includes a drive shaft 101, a first gear 102, and a second gear 103. The drive shaft 101 is rotatably mounted within the inner cavity 13. The first gear 102 is mounted on the right end of the drive shaft 101 and meshes with the central shaft auxiliary gear 8. The second gear 103 is mounted on the left end of the drive shaft 101 and meshes with the input end of the meshing gear set 11. The rotation of the central shaft auxiliary gear 8 drives the first gear 102 to rotate, causing the drive shaft 101 to rotate accordingly. The rotation of the drive shaft 101 drives the second gear 103 to rotate, transmitting power to the input end of the meshing gear set 10. Through the drive shaft 101, the first gear 102, and the second gear 103, the power of the central shaft auxiliary gear 8 can be synchronously transmitted to the two meshing gear sets 11.

[0022] In this embodiment, the meshing gear set 11 includes a third gear 111 and a fourth gear 112. The third gear 111 of the two meshing gear sets 11 is respectively mounted on the left shaft 4 and the right shaft 5. The fourth gear 112 is rotatably mounted in the inner cavity 13 and meshes with the third gear 111 and the second gear 103. When the second gear 103 rotates, it drives the fourth gear 112 to rotate, which in turn drives the third gear 111 to rotate, so that the left shaft 4 and the right shaft 5 rotate synchronously in opposite directions. The power of the second gear can be transmitted to the left shaft and the right shaft through the third gear and the fourth gear.

[0023] In this embodiment, bearings 104 are fitted at both ends of the drive shaft 101. The bearings 104 are installed inside the inner cavity 13, facilitating the placement of the drive shaft 101 within the inner cavity 13 and ensuring smoother rotation of the drive shaft 101. The two central shaft gear assemblies 10 are located on both sides of the central shaft 3, making the overall structure symmetrical. The central shaft 3, the left shaft 4, and the right shaft 5 are located on the same horizontal plane, enabling synchronous output from the three shafts in opposite directions and facilitating docking with a triple extrusion screw.

[0024] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gear box for a counter-rotating triple screw extruder, characterized by: The utility model provides a kind of transmission mechanism, including upper box, lower box, middle shaft, left shaft, right shaft, input shaft, middle shaft main gear, middle shaft auxiliary gear, input gear, two intermediate gear shaft assemblies and two meshing gear sets, the upper box is fixed on the lower box and is formed with the lower box box, the inner cavity is equipped in the box, the middle shaft, the left shaft and the right shaft are rotatably arranged in the inner cavity, left end is inserted into the box, the middle shaft main gear and the middle shaft auxiliary gear are fixed on the right end of the middle shaft, the input shaft is rotatably arranged in the inner cavity, right end passes through the right side of the box, the input gear is fixed on the left end of the input shaft and is engaged with the middle shaft main gear, two meshing gear sets are installed in the inner cavity, and the output end is fixed on the left shaft and the right shaft respectively, and two intermediate gear shaft assemblies are installed in the inner cavity, and the input end is engaged with the middle shaft auxiliary gear, and the output end is engaged with the input end of two meshing gear sets.

2. The gearbox of a misaligned tri-screw extruder according to claim 1, characterized in that: The intermediate gear shaft assembly includes a transmission shaft, a first gear and a second gear, the transmission shaft is rotatably installed in the inner cavity, the first gear is installed on the right end of the transmission shaft and is engaged with the middle shaft auxiliary gear, and the second gear is installed on the left end of the transmission shaft and is engaged with the input end of the meshing gear set.

3. The gearbox of a misaligned tri-screw extruder according to claim 2, characterized in that: The meshing gear set includes a third gear and a fourth gear, the third gears of two meshing gear sets are respectively installed on the left shaft and the right shaft, and the fourth gear is rotatably installed in the inner cavity and is engaged with the third gear and the second gear.

4. The gearbox of a misaligned tri-screw extruder according to claim 2, characterized in that: Bearings are sleeved on both ends of the transmission shaft, and the bearings are installed in the inner cavity.

5. The gear box of a misaligned tri-screw extruder according to any one of claims 1 to 4, characterized in that: Two middle shaft gear assemblies are located on both sides of the middle shaft.

6. The gear box of a misaligned tri-screw extruder according to any one of claims 1 to 4, characterized in that: The middle shaft, the left shaft and the right shaft are located on the same horizontal plane.

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