A twin screw assembly based on modular design

Abstract

This utility model provides a modularly designed twin-screw assembly, comprising: a transmission mechanism, a first screw mechanism, a second screw mechanism, and an output shaft mounting base. The transmission mechanism includes an internal gear drive block and an internal gear mounting base. The internal gear mounting base has an inner cavity, and the power output end of the internal gear drive block is rotatably mounted on the internal gear mounting base. The power output end of the internal gear drive block is machined into an internal gear ring. The first screw output shaft of the first screw mechanism and the second screw output shaft of the second screw mechanism are arranged in parallel and connected to the output shaft mounting base. The first gear of the first screw mechanism and the second gear of the second screw mechanism respectively mesh with different areas of the internal gear ring of the internal gear drive block. The first gear and the second gear are staggered along the central axis in the internal gear drive block. This utility model solves the problem in the prior art where the two screws cannot work synchronously and the two screws grind against each other.

Description

Technical Field

[0001] This utility model relates to the field of batching system technology, and in particular to a twin-screw assembly based on modular design. Background Technology

[0002] The screw assembly is the core component of the screw feeder. The screw feeder includes a guide pipe, a screw assembly, and a power mechanism. The screw assembly is located in the guide pipe, and the power mechanism provides power to the screw assembly. The screw of the screw assembly rotates in the guide pipe to output the material in the guide pipe in a quantitative manner.

[0003] When the two screws of the existing twin-screw assembly are conveying materials, there is a deviation in the power transmission from the power mechanism to the two screws, which prevents the two screws from working synchronously and causes the two screws to grind against each other. Summary of the Invention

[0004] The technical problem to be solved by this utility model embodiment is to provide a twin-screw assembly based on modular design, which solves the problem that the two screws in the prior art cannot work synchronously and that the two screws have teeth that beat each other.

[0005] To solve the above-mentioned technical problems, this utility model provides a twin-screw assembly based on modular design, including: a transmission mechanism, a first screw mechanism, a second screw mechanism, and an output shaft mounting base; The transmission mechanism includes an internal gear drive block and an internal gear mounting seat. The internal gear mounting seat has an inner cavity. The internal gear drive block includes a power input end and a power output end. The power output end of the internal gear drive block is rotatably mounted on the internal gear mounting seat, and the power output end of the internal gear drive block is machined into an internal gear ring. The first screw mechanism includes a first screw output shaft and a first gear, with the first gear connected to the power input end of the first screw output shaft; The second screw mechanism includes a second screw output shaft and a second gear, with the second gear connected to the power input end of the second screw output shaft; The first screw output shaft of the first screw mechanism and the second screw output shaft of the second screw mechanism are arranged in parallel and connected in the output shaft mounting base, and can only rotate around their own axis; the first gear of the first screw mechanism and the second gear of the second screw mechanism respectively mesh with different areas of the internal gear ring of the internal gear drive block, and the first gear and the second gear are staggered along the central axis in the internal gear drive block; The power connection end of the output shaft mounting base is fixedly connected to the power output end of the internal gear mounting base.

[0006] The first screw mechanism further includes a first screw, and the first screw and the first gear are respectively fixed at both ends of the first screw output shaft. The second screw mechanism further includes a second screw, and the second screw and the second gear are respectively fixed at both ends of the second screw output shaft. The first screw and the second screw are screws that rotate in the same direction with their threads meshing with each other.

[0007] The transmission mechanism also includes two first bearings, the outer ring of the first bearing is connected to the internal gear mounting seat, and the inner ring of the first bearing is connected to the internal gear drive block.

[0008] A limiting boss is provided around the outer periphery of the internal gear drive block, and the limiting boss is located between the two first bearings.

[0009] One end of the internal gear drive block is provided with a gear transmission shaft with a common central axis, the gear transmission shaft extends out, and a coupling is installed on the gear transmission shaft.

[0010] The coupling is a three-jaw coupling.

[0011] The output shaft mounting base is provided with a plurality of second bearings and a plurality of third bearings. The outer ring of the second bearing is fixedly connected to the output shaft mounting base, the inner ring of the second bearing is fixedly connected to the first screw output shaft, the outer ring of the third bearing is fixedly connected to the output shaft mounting base, and the inner ring of the third bearing is fixedly connected to the second screw output shaft.

[0012] A sealing mounting cavity is provided on the inner wall of the working end of the output shaft mounting base. A sealing structure is installed in the sealing mounting cavity. The sealing structure includes a sealing ring, a first sealing ring, a spring, and a washer. The sealing ring and the spring are sleeved on the first screw output shaft. A groove is formed on the outer circumference of the sealing ring. The first sealing ring is placed in the groove of the sealing ring. A washer is installed on the inner end face of the sealing ring. The two ends of the spring abut against the output shaft mounting base and the washer, respectively. A protruding sealing ring boss is provided on the outer end face of the sealing ring. An output shaft boss is provided on the outer circumference of the first screw output shaft. A sliding sealing surface is formed between the sealing ring boss and the output shaft boss.

[0013] The sealing ring is made of silicon carbide.

[0014] A groove is provided on the outer wall of the working end of the output shaft mounting base, and a second sealing ring is installed in the groove of the output shaft mounting base.

[0015] This utility model provides a modular twin-screw assembly that transmits power synchronously to the first and second screw mechanisms through a transmission mechanism, driving the output shafts of the first and second screws to rotate synchronously in the same direction. The two screws have good working synchronization, and there is no tooth jamming between them. The two screws work together to transport materials, which greatly improves efficiency. Attached Figure Description

[0016] Figure 1 This is a structural cross-sectional view of the modular design-based twin-screw assembly of this utility model.

[0017] Figure 2 This is a cross-sectional view of the transmission mechanism of this utility model.

[0018] Figure 3 This is a sectional view of the first screw mechanism, the second screw mechanism, and the output shaft mounting base of this utility model.

[0019] Figure 4 for Figure 1 A magnified view of a portion of point A in the middle.

[0020] Figure 5 This is a schematic diagram of the output shaft mounting base of this utility model.

[0021] In the picture: 1. Transmission mechanism; 2. First screw mechanism; 3. Second screw mechanism; 4. Output shaft mounting seat; 5. Coupling; 6. Sealing structure; 11. Internal gear drive block; 12. Internal gear mounting seat; 13. First bearing; 21. First screw output shaft; 22. First gear; 23. First screw; 31. Second screw output shaft; 32. Second gear; 33. Second screw; 41. Second bearing; 42. Third bearing; 43. Sealed mounting cavity; 44. Second sealing ring; 61. Sealing ring; 62. First sealing ring; 63. Spring; 64. Washer ring; 111. Internal gear ring; 112. Gear drive shaft; 113. Limiting boss; 211. First screw shaft boss; 611. Sealing ring boss. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items. Example

[0025] This utility model provides a twin-screw assembly based on modular design, such as Figure 1-5 It includes: a transmission mechanism 1, a first screw mechanism 2, a second screw mechanism 3, and an output shaft mounting base 4, such as... Figure 2 The transmission mechanism 1 includes an internal gear drive block 11, an internal gear mounting seat 12, and two first bearings 13. The internal gear mounting seat 12 has an internal cavity and openings at both ends. The left end of the internal gear mounting seat 12 is the power input end, and the right end is the power output end. The power output end of the internal gear drive block 11 is rotatably mounted on the internal gear mounting seat 12, and the power output end of the internal gear drive block 11 is machined into an internal gear ring 111. The outer ring of the first bearing 13 is fixedly connected to the internal gear mounting seat 12, and the inner ring of the first bearing 13 is fixedly connected to the internal gear drive block 11. A limiting boss 113 is provided on the outer periphery of the internal gear drive block 11, and the limiting boss 113 is located between the two first bearings 13.

[0026] The left end of the internal gear drive block 11 is provided with a gear drive shaft 112 with a common central shaft. The gear drive shaft 112 extends to the left and a coupling 5 is installed on the gear drive shaft 112. The coupling 5 is a three-jaw coupling. The transmission mechanism 1 is connected to an external power source through the three-jaw coupling.

[0027] like Figure 1 , 3 The first screw mechanism 2 includes a first screw output shaft 21, a first gear 22, and a first screw 23. The first gear 22 is fixed to the power input end at the left end of the first screw output shaft 21, and the first screw 23 is fixed to the right end of the first screw output shaft 21. The first gear 22 meshes with the internal gear ring 111 for transmission.

[0028] like Figure 1 , 3 The second screw mechanism 3 includes a second screw output shaft 31, a second gear 32, and a second screw 33. The second gear 32 is fixed to the power input end at the left end of the second screw output shaft 31, and the second screw 33 is fixed to the right end of the second screw output shaft 31. The second gear 32 meshes with the internal gear ring 111 for transmission. The first gear 22 and the second gear 32 mesh with different areas of the internal gear ring 111 for transmission. The first gear 22 and the second gear 32 are staggered along the central axis in the internal gear drive block 11. (Refer to...) Figure 1 ,3 The first gear 22 is located to the left of the second gear 32; the first screw 23 and the second screw 33 are screws that rotate in the same direction with their threads meshing with each other.

[0029] like Figure 1-4 The left end of the output shaft mounting base 4 is the power connection end, and the right end of the output shaft mounting base 4 is the working end. The power connection end of the output shaft mounting base 4 is fixedly connected to the power output end at the right end of the internal gear mounting base 12. The first screw output shaft 21 of the first screw mechanism 2 and the second screw output shaft 31 of the second screw mechanism 3 are arranged in parallel and connected in the output shaft mounting base 4, and can only rotate around their own axis.

[0030] The output shaft mounting base 4 is provided with several second bearings 41 and several third bearings 42. The outer ring of the second bearing 41 is fixedly connected to the output shaft mounting base 4, and the inner ring of the second bearing 41 is fixedly connected to the first screw output shaft 21. The outer ring of the third bearing 42 is fixedly connected to the output shaft mounting base 4, and the inner ring of the third bearing 42 is fixedly connected to the second screw output shaft 31.

[0031] like Figure 4-5 A sealing mounting cavity 43 is provided on the inner wall of the working end of the output shaft mounting base 4. A sealing structure 6 is installed in the sealing mounting cavity 43. The sealing structure 6 includes a sealing ring 61, a first sealing ring 62, a spring 63, and a washer 64. The sealing ring 61 is made of silicon carbide, which has good wear resistance. The sealing ring 61 and the spring 63 are sleeved on the first screw output shaft 21. Figure 4 A washer 64 is installed on the left end face of the sealing ring 61. A spring 63 is located to the left of the washer 64, with both ends of the spring 63 abutting against the output shaft mounting seat 4 and the washer 64, respectively. Figure 5 In the design, a protruding sealing ring boss 611 is provided at the right end of the sealing ring 61, and an output shaft boss 211 is provided around the outer circumference of the first screw output shaft 21. The sealing ring boss 611 and the output shaft boss 211 are sealed and fitted together to form a sliding sealing surface. The contact surfaces between the sealing ring boss 611 and the output shaft boss 211 are smoothly machined, resulting in low frictional resistance. A groove is formed on the outer circumference of the sealing ring 61, and a first sealing ring 62 is placed in the groove of the sealing ring 61. The first sealing ring 62 seals the gap between the sealing ring 61 and the output shaft mounting seat 4. During operation, the first screw output shaft 21 rotates, and the sealing ring 61 is connected to the output shaft mounting seat 4 through a compressed spring 63. The compressed spring 63 abuts against the sealing ring 61, preventing the sealing ring 61 from rotating. When the sealing ring 61 does not rotate, the spring 63 abuts against the sealing ring 61, and the sealing ring 61 is sealed and fitted with the output shaft boss 211. During long-term operation, when there is wear and tear between the sealing ring 61 and the output shaft boss 211, the spring 63 pushes the sealing ring 61 towards the output shaft boss 211 to maintain the sealing state between the sealing ring 61 and the output shaft boss 211 at all times.

[0032] A groove is provided on the outer wall of the working end of the output shaft mounting base 4, and a second sealing ring 44 is installed in the groove of the output shaft mounting base 4.

[0033] During operation, the external power mechanism drives the internal gear drive block 11 of the transmission mechanism 1 to rotate in the internal gear mounting seat 12 through the coupling 5. The internal gear drive block 11 is synchronously meshed with the first gear 22 and the second gear 32 inside the internal gear ring 111, thereby driving the first screw 23 and the second screw 33 to rotate synchronously in the same direction. The first screw 23 and the second screw 33 rotate together to transport materials.

[0034] In summary, the modular twin-screw assembly of this invention transmits power synchronously to the first and second screw mechanisms through a transmission mechanism, causing the output shafts of the first and second screws to rotate synchronously in the same direction. The two screws have good working synchronization, and there is no tooth jamming between them. The two screws work together to transport materials, resulting in a significant improvement in efficiency.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A twin-screw assembly based on modular design, characterized in that, include: Transmission mechanism (1), first screw mechanism (2), second screw mechanism (3), output shaft mounting base (4); The transmission mechanism (1) includes an internal gear drive block (11) and an internal gear mounting seat (12). The internal gear mounting seat (12) has an inner cavity. The internal gear drive block (11) includes a power input end and a power output end. The power output end of the internal gear drive block (11) is rotatably mounted on the internal gear mounting seat (12), and the power output end of the internal gear drive block (11) is machined into an internal gear ring (111). The first screw mechanism (2) includes a first screw output shaft (21) and a first gear (22), the first gear (22) being connected to the power input end of the first screw output shaft (21); The second screw mechanism (3) includes a second screw output shaft (31) and a second gear (32), the second gear (32) being connected to the power input end of the second screw output shaft (31); The first screw output shaft (21) of the first screw mechanism (2) and the second screw output shaft (31) of the second screw mechanism (3) are arranged in parallel and connected in the output shaft mounting seat (4), and can only rotate around their own axis; the first gear (22) of the first screw mechanism (2) and the second gear (32) of the second screw mechanism (3) respectively mesh with different areas of the internal gear ring (111) of the internal gear drive block (11), and the first gear (22) and the second gear (32) are staggered in the internal gear drive block (11) along the central axis direction; The power connection end of the output shaft mounting base (4) is fixedly connected to the power output end of the internal gear mounting base (12).

2. The twin-screw assembly based on modular design according to claim 1, characterized in that, The first screw mechanism (2) further includes a first screw (23), the first screw (23) and the first gear (22) are respectively fixed at both ends of the first screw output shaft (21), and the second screw mechanism (3) further includes a second screw (33), the second screw (33) and the second gear (32) are respectively fixed at both ends of the second screw output shaft (31), and the first screw (23) and the second screw (33) are screws that rotate in the same direction with their threads meshing with each other.

3. The twin-screw assembly based on modular design according to claim 1, characterized in that, The transmission mechanism (1) further includes two first bearings (13), the outer ring of the first bearing (13) is connected to the internal gear mounting seat (12), and the inner ring of the first bearing (13) is connected to the internal gear drive block (11).

4. The twin-screw assembly based on modular design according to claim 3, characterized in that, The inner gear drive block (11) has a limiting boss (113) on its outer periphery, and the limiting boss (113) is located between the two first bearings (13).

5. The twin-screw assembly based on modular design according to claim 1, characterized in that, One end of the internal gear drive block (11) is provided with a gear drive shaft (112) with a common central axis. The gear drive shaft (112) extends out and a coupling (5) is installed on the gear drive shaft (112).

6. The twin-screw assembly based on modular design according to claim 5, characterized in that, The coupling (5) is a three-jaw coupling.

7. The twin-screw assembly based on modular design according to claim 1, characterized in that, The output shaft mounting base (4) is provided with several second bearings (41) and several third bearings (42). The outer ring of the second bearing (41) is fixedly connected to the output shaft mounting base (4), the inner ring of the second bearing (41) is fixedly connected to the first screw output shaft (21), the outer ring of the third bearing (42) is fixedly connected to the output shaft mounting base (4), and the inner ring of the third bearing (42) is fixedly connected to the second screw output shaft (31).

8. The twin-screw assembly based on modular design according to claim 2, characterized in that, A sealing mounting cavity (43) is provided on the inner wall of the working end of the output shaft mounting base (4). A sealing structure (6) is installed in the sealing mounting cavity (43). The sealing structure (6) includes a sealing ring (61), a first sealing ring (62), a spring (63), and a washer (64). The sealing ring (61) and the spring (63) are sleeved on the first screw output shaft (21). A groove is opened on the outer periphery of the sealing ring (61). The first sealing ring (62) is set in the groove of the sealing ring (61). The washer (64) is installed on the inner end face of the sealing ring (61). The two ends of the spring (63) abut against the output shaft mounting base (4) and the washer (64) respectively. A protruding sealing ring boss (611) is provided on the outer end face of the sealing ring (61). A ring of output shaft boss (211) is provided on the outer periphery of the first screw output shaft (21). A sliding sealing surface is formed between the sealing ring boss (611) and the output shaft boss (211).

9. The twin-screw assembly based on modular design according to claim 8, characterized in that, The sealing ring (61) is made of silicon carbide.

10. The twin-screw assembly based on modular design according to claim 8, characterized in that, A groove is provided on the outer wall of the working end of the output shaft mounting base (4), and a second sealing ring (44) is installed in the groove of the output shaft mounting base (4).

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