A counter-rotating screw assembly based on modular design

Abstract

The utility model provides a kind of counter-rotating screw assembly based on modularization design, comprising: transmission mechanism, first screw mechanism, second screw mechanism, output shaft mounting seat, transmission mechanism includes inner tooth drive body, inner tooth mounting seat, inner tooth mounting seat inside cavity and upper and lower two ends opening setting, inner tooth drive body rotates in inner tooth mounting seat, and a circle of inner tooth is arranged in inner tooth drive body, a circle of empty ring;The first screw output shaft one end of first screw mechanism is fixed first gear, and first gear is engaged with inner tooth transmission, and the second screw output shaft one end of second screw mechanism is fixed second gear, and second gear is engaged with first gear transmission, and first screw output shaft, second screw output shaft are arranged in output shaft mounting seat.This utility model solves the problem of the prior art that the double screw rotates in the same direction, which causes the material to be squeezed, the material to be easily caked, and the delivery metering and quality of the material to be affected.

Description

Technical Field

[0001] This utility model relates to the field of batching system technology, and in particular to a counter-rotating 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] Currently on the market, the two screws of the screw assembly rotate in the same direction, either clockwise or counterclockwise. When the material is in the same direction, it tends to be squeezed to one side in the feed tube, which can cause the material to clump together and affect the conveying and metering of the material as well as its quality. Summary of the Invention

[0004] The technical problem to be solved by this utility model embodiment is to provide a counter-rotating screw assembly based on modular design, which solves the problem of existing twin screws rotating in the same direction causing material compression, easy material agglomeration, and affecting material conveying, metering, and quality.

[0005] To solve the above-mentioned technical problems, this utility model provides a counter-rotating screw assembly based on modular design, comprising: A transmission mechanism, comprising an internal gear drive body and an internal gear mounting seat, wherein the internal gear mounting seat has an inner cavity, one end of the internal gear mounting seat is a power input end, and the other end of the internal gear mounting seat is a power output end, the internal gear drive body is rotatably mounted on the internal gear mounting seat, and the internal gear drive body has a ring of internal teeth and a ring of empty ring arranged sequentially along the direction of power transmission inside the internal gear drive body, the diameter of the empty ring being larger than the diameter of the internal teeth; The first screw mechanism includes a first screw output shaft and a first gear. The first gear is fixed to one end of the first screw output shaft and meshes with an internal gear for transmission. The second screw mechanism includes a second screw output shaft and a second gear. The second gear is fixed to one end of the second screw output shaft and meshes with the first gear for transmission. The second gear is located in an empty ring. An output shaft mounting base is provided, one end of which is a power connection end. The power connection end of the output shaft mounting base is fixedly connected to the power output end of the internal gear mounting base. 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.

[0006] The other end of the first screw output shaft is connected to the first screw, and the other end of the second screw output shaft is connected to the second screw. The first screw and the second screw are screws with interlocking threads that rotate in opposite directions.

[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 body.

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

[0009] One end of the internal gear drive body 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, and a spring. 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 disposed in the groove of the sealing ring. The two ends of the spring abut against the output shaft mounting base and the sealing ring, respectively. An output shaft boss is provided on the outer circumference of the first screw output shaft. The sealing ring abuts against 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 modularly designed counter-rotating screw assembly. Through a transmission mechanism, the first screw output shaft and the second screw output shaft rotate in opposite directions. The first screw and the second screw are screws with interlocking threads that rotate in opposite directions. The first screw and the second screw rotate in opposite directions and work together to transport materials. The material is transported smoothly, without compression, accumulation, or clumping, and the material transport measurement is accurate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the modularly designed counter-rotating screw assembly of this utility model.

[0017] Figure 2 This is a cross-sectional view of the modularly designed counter-rotating screw assembly of this utility model.

[0018] Figure 3 This is a cross-sectional view of the transmission mechanism of this utility model.

[0019] Figure 4 This is a sectional view of the first screw mechanism, the second screw mechanism, and the output shaft mounting base of this utility model.

[0020] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.

[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 body; 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; 111 Internal gear; 112 Hollow ring; 113 Gear drive shaft; 114 Limiting boss; 211 First screw shaft 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 counter-rotating screw assembly based on modular design, such as Figure 1-4 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 2-3 The transmission mechanism 1 includes an internal gear drive body 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 its upper and lower ends. The upper end of the internal gear mounting seat 12 is the power input end, and the lower end is the power output end. The internal gear drive body 11 is rotatably mounted on the internal gear mounting seat 12 and rotates along a vertical central axis. Inside the internal gear drive body 11, along the direction of power transmission, there is a ring of internal teeth 111 and a ring of hollow ring 112 arranged sequentially. The diameter of the hollow ring 112 is larger than the diameter of the internal teeth 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 body 11. A limiting boss 114 is provided on the outer periphery of the internal gear drive body 11, and the limiting boss 114 is located between the two first bearings 13.

[0026] The upper end of the internal gear drive body 11 is provided with a gear drive shaft 113 with a common central shaft. The gear drive shaft 113 extends upward and a coupling 5 is installed on the gear drive shaft 113. 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 2-4 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 upper end of the first screw output shaft 21, and the first screw 23 is fixed to the lower end of the first screw output shaft 21. The first gear 22 meshes with the internal gear 111 for transmission. like Figure 2-4 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 upper end of the second screw output shaft 31, and the second screw 33 is fixed to the lower end of the second screw output shaft 31. The second gear 32 meshes with the first gear 22 for transmission, and the second gear 32 is located in the hollow ring 112. The first screw 23 and the second screw 33 are screws with interlocking threads that rotate in opposite directions.

[0028] like Figure 1-4The upper end of the output shaft mounting base 4 is the power connection end, and the lower 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 lower 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.

[0029] 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.

[0030] like Figure 4-5 A sealing mounting cavity 43 is provided on the inner wall of the working end of the output shaft mounting seat 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, and a spring 63. 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 4-5 Spring 63 is located above sealing ring 61, and both ends of spring 63 abut against output shaft mounting base 4 and sealing ring 61 respectively. Figure 5 In this design, a protrusion is provided at the lower 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 protrusion of the sealing ring 61 and the output shaft boss 211 are sealed and fitted together. The contact surfaces between the protrusion of the sealing ring 61 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 prevents 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 together 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.

[0031] 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.

[0032] During operation, the external power mechanism drives the internal gear drive body 11 of the transmission mechanism 1 to rotate in the internal gear mounting seat 12 through the coupling 5. The internal gear drive body 11 meshes with the first gear 22 inside through the internal gear 111. The first gear 22 drives the second gear 32 to mesh and drive, thereby driving the first screw 23 and the second screw 33 to rotate in opposite directions. The first screw 23 and the second screw 33 rotate together to transport materials.

[0033] In summary, the modular counter-rotating screw assembly of this utility model drives the first screw output shaft and the second screw output shaft to rotate in opposite directions through a transmission mechanism. The first screw and the second screw are screws with interlocking threads that rotate in opposite directions. The first screw and the second screw rotate in opposite directions and work together to transport materials. The material is transported smoothly, without compression, accumulation, or clumping, and the material transport measurement is accurate.

[0034] 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.

[0035] 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 counter-rotating screw assembly based on a modular design, characterized in that, include: The transmission mechanism (1) includes an internal gear drive body (11) and an internal gear mounting seat (12). The internal gear mounting seat (12) has an inner cavity. One end of the internal gear mounting seat (12) is a power input end, and the other end of the internal gear mounting seat (12) is a power output end. The internal gear drive body (11) is rotatably mounted on the internal gear mounting seat (12). Inside the internal gear drive body (11), along the direction of power transmission, a ring of internal teeth (111) and a ring of empty ring (112) are arranged in sequence. The diameter of the empty ring (112) is larger than the diameter of the internal teeth (111). The first screw mechanism (2) includes a first screw output shaft (21) and a first gear (22). The first gear (22) is fixed at one end of the first screw output shaft (21), and the first gear (22) meshes with the internal gear (111) for transmission. The second screw mechanism (3) includes a second screw output shaft (31) and a second gear (32). The second gear (32) is fixed at one end of the second screw output shaft (31). The second gear (32) meshes with the first gear (22) for transmission. The second gear (32) is in the empty ring (112). Output shaft mounting base (4), one end of which is a power connection end, the power connection end of which is fixedly connected to the power output 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.

2. The modular design based counter-rotating screw assembly of claim 1, wherein, The other end of the first screw output shaft (21) is connected to the first screw (23), and the other end of the second screw output shaft (31) is connected to the second screw (33). The first screw (23) and the second screw (33) are screws with interlocking threads.

3. The modular design based counter-rotating screw assembly of claim 1, wherein, 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 body (11).

4. The modular design based counter-rotating screw assembly of claim 3, wherein, The inner gear drive body (11) is provided with a limiting boss (114) around its outer periphery, and the limiting boss (114) is located between the two first bearings (13).

5. The modular design based counter-rotating screw assembly of claim 1, wherein, One end of the internal gear drive body (11) is provided with a gear transmission shaft (113) with a common central axis, the gear transmission shaft (113) extends out, and a coupling (5) is installed on the gear transmission shaft (113).

6. The modular design based counter-rotating screw assembly of claim 5, wherein, The coupling (5) is a three-jaw coupling.

7. The modular design based counter-rotating screw assembly of claim 1, wherein, 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 modular design based counter-rotating screw assembly of claim 2, wherein, 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), and a spring (63). 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 two ends of the spring (63) abut against the output shaft mounting base (4) and the sealing ring (61) respectively. An output shaft boss (211) is provided on the outer periphery of the first screw output shaft (21). The sealing ring (61) abuts against the output shaft boss (211).

9. The modular design based counter-rotating screw assembly of claim 8, wherein, The sealing ring (61) is made of silicon carbide.

10. The modular design based counter-rotating screw assembly of claim 8, wherein, 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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