Speed reducer output structure of double-screw extruder
By setting up a series of stain -bearing pre -adjusting the structure in the output structure of the dual screw extruder, the structure of the stubborn thrust bearing pre -tightening adjustment in the existing technology has been solved, and it is more convenient and controllable. Overcoming process.
Patent Information
- Application Number
- CN202421380442.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-06-14
AI Technical Summary
The existing twin-screw extruder reducer output structure has difficulties in assembly and adjustment, especially the inconvenient preload adjustment of series thrust bearings, resulting in poor assembly and poor later adjustment.
By setting up a series of thrust bearing to adjust the structure by setting up a series of thrust bearing, it is installed on the thread shaft, and the torque wrench adjusts the thread to apply the theoretical torque to adjust the pre -tightening force of the series thrust bearing.
A more convenient and controllable adjustment of the tightness of the stain -shaped bearing, simplifying the assembly process, and improving the convenience and controllability of the overall assembly.
Smart Images
Figure CN222415878U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of reducer structures, in particular to an output structure of a twin-screw extruder reducer. Background Art
[0002] The twin-screw extruder rotates in the barrel to push the material. The screw sleeve is installed on the long screw through internal and external splines. The long screw is rigidly connected to the two output shafts of the gearbox through the spline sleeve. Therefore, the center distance between the two screws of the extruder limits the center distance between the two output shafts of the reducer, and also limits the installation position of the bearing.
[0003] The existing reducer output short shaft adopts a small thrust bearing arranged at the front end (bounded by the gear, right is the front end) to withstand the reverse thrust in the non-working state. A tandem thrust bearing is arranged at the rear end to withstand the large thrust during operation. Figure 4 During assembly, this arrangement structure uses 8 bolts to support one end of the tandem thrust bearing, and then inserts a gasket to adjust the preload of the tandem thrust bearing, resulting in poor assembly of the tandem thrust bearing. It requires more auxiliary assembly tools to adjust the tandem thrust bearing, and its later adjustability is poor. During processing, due to the small center distance between the front ends of the output long shaft and the output short shaft, the wall thickness between the thrust bearing holes installed at the front ends of the two output shafts is small, resulting in high risk and difficulty in processing the bearing seat. Summary of the invention
[0004] The purpose of the utility model is to provide a twin-screw extruder reducer output structure, which is convenient for adjusting the position of the tandem thrust bearing preload adjustment structure on the threaded shaft to adjust the preload of the tandem thrust bearing, thereby more conveniently and controllably adjusting the preload of the tandem thrust bearing and making the overall assembly more convenient.
[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme.
[0006] A twin-screw extruder reducer output structure comprises an output long shaft, an output short shaft, a first thrust bearing, a threaded shaft, a second bearing seat and a tandem thrust bearing, wherein the front end of the output long shaft is mounted on the first thrust bearing, the threaded shaft is connected to the rear end of the output short shaft, the tandem thrust bearing is mounted on the threaded shaft, and further comprises a tandem thrust bearing preload adjustment structure, wherein the tandem thrust bearing preload adjustment structure is mounted in the second bearing seat and connected to an end of the threaded shaft away from the output short shaft, and the preload of the tandem thrust bearing is adjusted by adjusting the position of the tandem thrust bearing preload adjustment structure on the threaded shaft.
[0007] The utility model adopts the above-mentioned scheme, by installing the tandem thrust bearing preload adjustment structure in the second bearing seat and connecting it to the end of the threaded shaft away from the output short shaft, it is convenient to adjust the position of the tandem thrust bearing preload adjustment structure on the threaded shaft from the inside of the second bearing seat during work, so as to adjust the preload of the tandem thrust bearing, instead of adjusting the preload of the tandem thrust bearing through the auxiliary plug gasket of the tooling, thereby more conveniently and controllably adjusting the preload of the tandem thrust bearing and making the overall assembly more convenient.
[0008] Preferably, it further comprises two needle roller bearings, which are respectively mounted on the front ends of the output long shaft and the output short shaft.
[0009] In this way, the needle bearings are respectively installed at the front ends of the output long shaft and the output short shaft to perform radial positioning on the corresponding output shaft.
[0010] Preferably, it further comprises a first bearing seat, the first thrust bearing is mounted on the inner side of the first bearing seat, a spring assembly is sleeved on the output long shaft, and the spring assembly abuts against a side of the first thrust bearing away from the needle bearing.
[0011] In this way, the spring assembly is pressed against the side of the first thrust bearing away from the needle bearing, so that the first thrust bearing can be pre-tightened by the spring assembly.
[0012] Preferably, it further comprises an end cover, which is sleeved on the front ends of the output major shaft and the output minor shaft and connected to the first bearing seat, and the inner side of the end cover abuts against the spring assembly.
[0013] In this way, by providing the end cover and making the inner side of the end cover abut against the spring assembly, it is convenient to apply force and pre-tightening force to the spring assembly through the end cover.
[0014] Preferably, a full cylindrical bearing is installed on the outer periphery of the connection between the output stub shaft and the threaded shaft.
[0015] In this way, by installing a full cylindrical bearing on the outer periphery of the connection between the output stub shaft and the threaded shaft, radial positioning of the output stub shaft is facilitated.
[0016] Preferably, a countersunk hole is formed on the inner side of the second bearing seat, and the tandem thrust bearing preload adjustment structure is located in the countersunk hole, and the tandem thrust bearing preload adjustment structure abuts against the bottom of the countersunk hole.
[0017] In this way, by forming a countersunk hole on the inner side of the two bearing seats to install the tandem thrust bearing preload adjustment structure, it is convenient to adjust the abutment force between the tandem thrust bearing preload adjustment structure and the bottom of the countersunk hole on the outer side of the reducer structure, thereby adjusting the tandem thrust bearing preload.
[0018] Preferably, the tandem thrust bearing preload adjustment structure includes a disc spring, a second thrust bearing, a wear-resistant pad, a distance sleeve, a first adjustment pad and a nut, the first adjustment pad is sleeved on the threaded shaft, the second thrust bearing is sleeved on the first adjustment pad, the nut is threaded with the threaded shaft and abuts against the first adjustment pad, the second thrust bearing and the distance sleeve are both sleeved on the first adjustment washer, and the disc spring and the wear-resistant pad are both sleeved on the distance sleeve.
[0019] In this way, it is convenient to apply theoretical torque to the nut by using a torque wrench, thereby adjusting the preload force of the tandem thrust bearing, and setting the second thrust bearing of the output short shaft at the rear end of the output short shaft instead of the structure set at the front end of the output short shaft, so as to make the wall thickness between the two bearing holes of the first bearing seat thicker, thereby reducing the processing difficulty and processing risk.
[0020] Preferably, the first adjustment pad is T-shaped as a whole, the second thrust bearing and the distance sleeve are both mounted on the vertical portion of the first adjustment pad, and the disc spring, wear-resistant pad and the distance sleeve are all located between the second thrust bearing and the transverse portion of the first adjustment pad.
[0021] In this way, it is convenient to preload the tandem thrust bearing at a constant pressure by compressing the disc spring to generate an axial force, and to grind the first adjustment pad so that when the disc spring is compressed to the required preload force, there is a set gap between the distance sleeve and the second thrust bearing to keep the disc spring generating a constant force acting on both ends.
[0022] Preferably, it also includes a second adjustment washer, and the second adjustment washer is located between the tandem thrust bearing and the second bearing seat.
[0023] In this way, the shaft ends of the two output shafts are made parallel by grinding the second adjustment pad, and the output short shaft and the second bearing seat are installed against each other, thereby solving the problem of axial movement of the output short shaft of the extruder reducer.
[0024] The beneficial effects of the utility model are: by using a torque wrench to apply theoretical torque to the nut, the disc spring is compressed to generate axial force to preload the tandem thrust bearing at a constant pressure, and the first adjustment pad is ground, so that when the disc spring is compressed to the required preload force, there is a set gap between the fixed distance sleeve and the second thrust bearing, so as to keep the disc spring generating a constant force acting on both ends, thereby adjusting the preload force of the tandem thrust bearing, thereby more conveniently and controllably adjusting the preload force of the tandem thrust bearing, and making the overall assembly more convenient. The second thrust bearing of the output short shaft is arranged at the rear end of the output short shaft instead of the structure arranged at the front end of the output short shaft, so as to make the wall thickness between the two bearing holes of the first bearing seat thicker, and reduce the processing difficulty and processing risk of the first bearing seat. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1A structural diagram of a structure of the utility model;
[0026] Figure 2 For this utility model Figure 1 Enlarged view of the middle Z section;
[0027] Figure 3 For this utility model Figure 1 Enlarged view of the middle X section;
[0028] Figure 4 It is a structural diagram of the background technology in the utility model. DETAILED DESCRIPTION
[0029] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.
[0030] The figure marks in the drawings of the specification include: output major shaft 1, first thrust bearing 2, spring group 3, end cover 4, first bearing seat 5, needle bearing 6, output short shaft 7, cylindrical bearing 8, tandem thrust bearing 9, second thrust bearing 10, disc spring 11, wear-resistant pad 12, first adjustment pad 13, nut 14, threaded shaft 15, second bearing seat 16, second adjustment pad 17, and distance sleeve 18.
[0031] The words "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections or communication connections, whether direct or indirect.
[0032] Embodiment 1, as Figure 1 , Figure 2 and Figure 3As shown; the present application provides an output structure of a twin-screw extruder reducer, including an output long shaft 1, an output short shaft 7, a first thrust bearing 2, a threaded shaft 15, a second bearing seat 16 and a tandem thrust bearing 9, wherein the front end of the output long shaft 1 is mounted on the first thrust bearing 2, the threaded shaft 15 is connected to the rear end of the output short shaft 7, the tandem thrust bearing 9 is mounted on the threaded shaft 15, and further comprises a tandem thrust bearing preload adjustment structure, wherein the tandem thrust bearing preload adjustment structure is mounted in the second bearing seat 16 and connected to the end of the threaded shaft 15 away from the output short shaft 7, and the preload of the tandem thrust bearing 9 is adjusted by adjusting the position of the tandem thrust bearing preload adjustment structure on the threaded shaft 15.
[0033] See also Figure 1 , and also includes two needle bearings 6, and the front ends of the output long shaft 1 and the output short shaft 7 are respectively mounted on the two needle bearings 6. In this way, by mounting the needle bearings 6 on the front ends of the output long shaft 1 and the output short shaft 7, respectively, the corresponding output shafts are radially positioned.
[0034] See also Figure 1 and Figure 2 , further comprising a first bearing seat 5, the first thrust bearing 2 being mounted inside the first bearing seat 5, a spring group 3 being sleeved on the output long shaft 1, and the spring group 3 being in contact with a side of the first thrust bearing 2 away from the needle bearing 6. In this way, the spring group 3 is in contact with a side of the first thrust bearing 2 away from the needle bearing 6, so that the first thrust bearing 2 is pre-tightened by the spring group 3.
[0035] See also Figure 1 and Figure 2 , and also includes an end cover 4, which is sleeved on the front ends of the output long shaft 1 and the output short shaft 7 and connected to the first bearing seat 5, and the inner side of the end cover 4 abuts against the spring group 3. In this way, by providing the end cover 4 and making the inner side of the end cover 4 abut against the spring group 3, it is convenient to apply force to the spring group 3 through the end cover 4 to add pre-tightening force.
[0036] See also Figure 1 A full cylindrical bearing 8 is installed on the outer periphery of the connection between the output short shaft 7 and the threaded shaft 15.
[0037] In this way, by installing a full cylindrical bearing 8 on the outer periphery of the connection between the output stub shaft 7 and the threaded shaft 15, radial positioning of the output stub shaft 7 is facilitated.
[0038] See also Figure 1 and Figure 3A countersunk hole is formed on the inner side of the second bearing seat 16, and the tandem thrust bearing preload adjustment structure is located in the countersunk hole, and the tandem thrust bearing preload adjustment structure abuts against the bottom of the countersunk hole. The second bearing seat 16 abuts against the tandem thrust bearing 9. In this way, by forming a countersunk hole on the inner side of the second bearing seat 10 to install the tandem thrust bearing preload adjustment structure, it is convenient to adjust the abutment force between the tandem thrust bearing preload adjustment structure and the bottom of the countersunk hole on the outer side of the reducer structure, thereby adjusting the preload of the tandem thrust bearing 9.
[0039] See also Figure 1 and Figure 3 The tandem thrust bearing preload adjustment structure includes a first adjustment pad 13 and a nut 14. The first adjustment pad 13 is sleeved on the threaded shaft 15. The second thrust bearing 10 is sleeved on the first adjustment pad 13. The nut 14 is screwed with the threaded shaft 15 and abuts against the first adjustment pad 13. The tandem thrust bearing preload adjustment structure also includes a disc spring 11, a second thrust bearing 10, a wear pad 12 and a distance sleeve 18. The second thrust bearing 10 and the distance sleeve 18 are both sleeved on the first adjustment pad 13. The disc spring 11 and the wear pad 12 are both sleeved on the distance sleeve 18. In this way, it is convenient to apply theoretical torque to the nut 14 by using a torque wrench, thereby adjusting the preload of the tandem thrust bearing 9. The second thrust bearing 10 of the output short shaft 7 is arranged at the rear end of the output short shaft 7 instead of the structure arranged at the front end of the output short shaft 7, so as to make the wall thickness between the two bearing holes of the first bearing seat 5 thicker, reducing the processing difficulty and processing risk.
[0040] See also Figure 1 and Figure 3 , the first adjustment pad 13 is in a T-shape as a whole, the second thrust bearing 10 and the distance sleeve 18 are both sleeved on the vertical part of the first adjustment pad 13, and the disc spring 11, the wear-resistant pad 12 and the distance sleeve 18 are all located between the second thrust bearing 10 and the transverse part of the first adjustment pad 13. In this way, it is convenient to perform constant pressure preload on the tandem thrust bearing 9 by compressing the disc spring 11 to generate an axial force, and the first adjustment pad 13 is grinded, so that when the disc spring 11 is compressed to the required preload force, there is a gap of about 0.3mm between the distance sleeve 18 and the second thrust bearing 10, so as to keep the disc spring 11 generating a constant force acting on both ends.
[0041] See also Figure 1 , and further includes a second adjustment pad 17, which is located between the tandem thrust bearing 9 and the second bearing seat 16. In this way, the shaft ends of the two output shafts are made parallel by grinding the second adjustment pad 17, and the output short shaft 7 and the second bearing seat 16 are installed against each other, thereby solving the problem of axial movement of the output short shaft 7 of the extruder reducer.
[0042] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.
Claims
1. A twin-screw extruder reducer output structure, comprising an output long shaft (1), an output short shaft (7), a first thrust bearing (2), a threaded shaft (15), a second bearing seat (16) and a tandem thrust bearing (9), wherein the front end of the output long shaft (1) is mounted on the first thrust bearing (2), the threaded shaft (15) is connected to the rear end of the output short shaft (7), and the tandem thrust bearing (9) is mounted on the threaded shaft (15), characterized in that: It also includes a tandem thrust bearing preload adjustment structure, which is installed in the second bearing seat (16) and connected to the end of the threaded shaft (15) away from the output short shaft (7). The preload of the tandem thrust bearing (9) is adjusted by adjusting the position of the tandem thrust bearing preload adjustment structure on the threaded shaft (15).
2. The twin-screw extruder reducer output structure according to claim 1, characterized in that: It also includes two needle roller bearings (6), and the front ends of the output long shaft (1) and the output short shaft (7) are respectively mounted on the two needle roller bearings (6).
3. The twin-screw extruder reducer output structure according to claim 2, characterized in that: It also comprises a first bearing seat (5), the first thrust bearing (2) is mounted on the inner side of the first bearing seat (5), a spring assembly (3) is sleeved on the output long shaft (1), and the spring assembly (3) abuts against a side of the first thrust bearing (2) away from the needle bearing (6).
4. The twin-screw extruder reducer output structure according to claim 3, characterized in that: It also includes an end cover (4), which is sleeved on the front ends of the output long shaft (1) and the output short shaft (7) and connected to the first bearing seat (5), and the inner side of the end cover (4) is in contact with the spring assembly (3).
5. The twin-screw extruder reducer output structure according to claim 1, characterized in that: A full cylindrical bearing (8) is installed on the outer periphery of the connection between the output short shaft (7) and the threaded shaft (15).
6. The twin-screw extruder reducer output structure according to claim 1, characterized in that: A countersunk hole is formed on the inner side of the second bearing seat (16), the tandem thrust bearing preload adjustment structure is located in the countersunk hole, and the tandem thrust bearing preload adjustment structure abuts against the bottom of the countersunk hole.
7. The twin-screw extruder reducer output structure according to claim 6, characterized in that: The tandem thrust bearing preload adjustment structure comprises a disc spring (11), a second thrust bearing (10), a wear-resistant pad (12), a distance sleeve (18), a first adjustment pad (13) and a nut (14); the first adjustment pad (13) is sleeved on the threaded shaft (15); the second thrust bearing (10) is sleeved on the first adjustment pad (13); the nut (14) is threaded with the threaded shaft (15) and abuts against the first adjustment pad (13); the second thrust bearing (10) and the distance sleeve (18) are both sleeved on the first adjustment pad (13); the disc spring (11) and the wear-resistant pad (12) are both sleeved on the distance sleeve (18).
8. The twin-screw extruder reducer output structure according to claim 7, characterized in that: The first adjustment pad (13) is T-shaped as a whole, the second thrust bearing (10) and the distance sleeve (18) are both mounted on the vertical portion of the first adjustment pad (13), and the disc spring (11), the wear-resistant pad (12) and the distance sleeve (18) are all located between the second thrust bearing (10) and the transverse portion of the first adjustment pad (13).
9. The twin-screw extruder reducer output structure according to any one of claims 1 to 8, characterized in that: It also includes a second adjustment pad (17), wherein the second adjustment pad (17) is located between the tandem thrust bearing (9) and the second bearing seat (16).