Spline shaft connecting structure
By adopting a separate structure for the spline shaft and spline sleeve and a modular design, the problems of compatibility and high processing cost of the output shaft structure of high-torque parallel twin-screw extruders are solved, achieving high precision and rapid maintenance.
Patent Information
- Application Number
- CN202520759837.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-04-21
AI Technical Summary
The output shaft structure of existing high-torque parallel twin-screw extruders is integrated, resulting in poor adaptability, high processing and time costs, complex maintenance and low flexibility, and the need for frequent disassembly of core components, which affects production continuity.
It adopts a split structure design of spline shaft and spline sleeve, and adjusts the distance between spline shafts by means of a spacer ring. Combined with limit block and locking nut, it realizes modular design, can be decomposed into detachable components, and achieves 0.01mm precision control by means of a precision spacer ring.
It reduces reliance on heavy-duty processing equipment, improves processing pass rate and accuracy, supports rapid disassembly and replacement, and reduces maintenance time and costs.
Smart Images
Figure CN223825467U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of shaft connecting structure especially spline shaft connecting structure. BACKGROUND
[0002] The existing output shaft structure of high-torque parallel double-screw extruder speed reducer is an integrated output shaft structure, when applied to different screw length sizes, the whole output system needs to be disassembled, the output shaft needs to be additionally reprocessed, the assembly is time-consuming and labor-consuming, the precision is low, and the processing cost is high.
[0003] 1. Poor adaptability: the integrated output shaft needs to be strictly matched with a specific screw length, different screw sizes need to be customized with different output shafts, the flexibility is low, the core components such as the speed reducer and the bearing seat need to be disassembled when adjusting, which easily leads to assembly errors and affects the coaxiality and transmission precision.
[0004] 2. High processing and time cost: the output shaft needs to be reprocessed every time the screw length is replaced, involving turning, heat treatment, grinding and other processes, the cycle is long, the material waste rate is high, the assembly and debugging need to be stopped for several hours or even several days, and the production line continuity is affected.
[0005] 3. Complex maintenance and spare parts management: a variety of specifications of output shaft spare parts need to be reserved, which occupies storage space and increases management cost, and long-term disassembly easily leads to wear of surrounding components such as bearings and seals, shortening the service life of the equipment. INVENTION CONTENTS
[0006] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art, provide a spline shaft connecting structure, adopt a split structure design of spline shaft and spline sleeve, reduce the processing difficulty of the output shaft, the output shaft shaft extension distance is adjustable, and installation and maintenance are more convenient.
[0007] The utility model adopts the technical scheme in the technical solution: a spline shaft connecting structure, including spline shaft one, spline shaft two, limit block, lock nut, fixed distance ring and spline sleeve, the inner spline part of one end of the spline sleeve is matched with the outer spline part of the spline shaft one, the inner spline part of the other end of the spline sleeve is matched with the outer spline part of the spline shaft two, the spline shaft one is connected with the spline shaft two through the spline sleeve, the end face of the outer spline part of the spline shaft two is fixedly provided with the fixed distance ring for adjusting the distance between the spline shaft one and the spline shaft two, and the two sides of the spline sleeve are respectively provided with the limit block and locked and fixed through the lock nut.
[0008] Further specifically, in the technical solution, the fixed distance ring is fixedly installed on the end face of the outer spline part of the spline shaft two through a fastening bolt.
[0009] To be further specific, in the above technical solution, the first spline shaft, the second spline shaft, the limiting block, the locking nut, the spacer ring, and the spline sleeve are all axisymmetric structures.
[0010] To be further specific, in the above technical solution, external thread portions are respectively provided on both sides of the outer wall of the spline sleeve, and the external thread portions are threadedly connected to the locking nut.
[0011] To be further specific, in the above technical solution, the limiting block has a constraint portion that restricts the axial movement of the spline sleeve.
[0012] The beneficial effects of this utility model are as follows: The spline shaft connection structure of this utility model adopts an innovative split structure design of spline shaft and spline sleeve for the output shaft. The distance between the spline shafts is adjusted by using a spacer ring. Through the modular design concept, the traditional integral shaft system is decomposed into detachable independent components. The core advantages of this design are reflected in three dimensions:
[0013] I. The split structure transforms the overall machining of large-size shaft parts into segmented machining, which greatly reduces the reliance on heavy machining equipment such as ultra-long CNC lathes and grinding machines, significantly shortens the machining length of a single piece, and significantly improves the machining qualification rate.
[0014] Second, by using a precision-machined spacer ring as the axial positioning reference element, and by replacing spacer rings of different thicknesses, clearance control with a precision of 0.01mm can be achieved in the spline mating section, effectively compensating for machining and assembly errors.
[0015] Third, the modular design supports quick on-site disassembly and replacement. The standardized interface design enables plug-and-play operation of the spline sub-components, greatly shortening maintenance time. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the spline shaft connection structure of this utility model;
[0018] Figure 2 yes Figure 1 A schematic diagram of the decomposed structure;
[0019] Figure 3 This is a schematic diagram of the spacer ring installed on the splined shaft 2;
[0020] Figure 4 is a schematic view of the position of the spline shaft one, the distance ring and the spline shaft two;
[0021] Figure 5 is a sectional view of the spline shaft connecting structure of the utility model.
[0022] The reference numerals in the figure are: 1, spline shaft one; 2, spline shaft two; 3, limiting block; 4, locking nut; 5, distance ring; 6, spline sleeve; 7, fastening bolt. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.
[0024] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the utility model relates to a spline shaft connecting structure, which comprises spline shaft one 1, spline shaft two 2, limiting block 3, locking nut 4, distance ring 5 and spline sleeve 6, the inner spline part of one end of the spline sleeve 6 is positioned and matched with the outer spline part of the spline shaft one 1, the inner spline part of the other end of the spline sleeve 6 is positioned and matched with the outer spline part of the spline shaft two 2, the spline shaft one 1 is connected with the spline shaft two 2 through the spline sleeve 6, the end face of the outer spline part of the spline shaft two 2 is fixedly provided with the distance ring 5 for adjusting the distance between the spline shaft one 1 and the spline shaft two 2, and the limiting block 3 is arranged on the two sides of the spline sleeve 6 respectively and is locked and fixed through the locking nut 4.
[0025] Among them, the distance ring 5 is fixedly installed on the end face of the outer spline part of the spline shaft two 2 through the fastening bolt 7. The spline shaft one 1, the spline shaft two 2, the limiting block 3, the locking nut 4, the distance ring 5 and the spline sleeve 6 are all axisymmetric structures. The two sides of the outer wall of the spline sleeve 6 are respectively provided with outer threaded portions, and the outer threaded portions are in threaded connection with the locking nut 4. The limiting block 3 has a constraint part for restricting the axial movement of the spline sleeve 6.
[0026] The spline shaft connecting structure adopts the split type innovative structure design of spline shaft one 1, spline shaft two 2 and spline sleeve 6, the distance between spline shaft one 1 and spline shaft two 2 is adjusted by means of the fixed distance ring 5, the spline shaft one 1 and the spline shaft two 2 are positioned and fixed by means of the limiting block 3 and the locking nut 4, the traditional integral type shaft system is decomposed into detachable independent components through the modular design concept. The split structure changes the integral machining of large size shaft parts into segmented machining, greatly reduces the dependence on heavy machining equipment such as super long numerical control lathes and grinding machines, greatly shortens the single piece machining length, and significantly improves the machining qualification rate; the fixed distance ring 5 which is precisely machined is used as an axial positioning reference element, through replacing the fixed distance ring 5 with different thickness, the gap control of the spline matching section can be realized with the precision of 0.01mm, and the machining and assembly errors are effectively compensated; the modular design supports on-site quick disassembly and replacement, the spline pair assembly can be used immediately through the standardized interface design, and the maintenance operation time is greatly shortened.
[0027] The above is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. A splined shaft connection structure, characterized in that: The device includes a first spline shaft (1), a second spline shaft (2), a limiting block (3), a locking nut (4), a spacer ring (5), and a spline sleeve (6). The inner spline portion at one end of the spline sleeve (6) is positioned and matched with the outer spline portion of the first spline shaft (1), and the inner spline portion at the other end of the spline sleeve (6) is positioned and matched with the outer spline portion of the second spline shaft (2). The first spline shaft (1) and the second spline shaft (2) are connected through the spline sleeve (6). A spacer ring (5) for adjusting the distance between the first spline shaft (1) and the second spline shaft (2) is installed and fixed on the end face of the outer spline portion of the second spline shaft (2). The limiting blocks (3) are respectively provided on both sides of the spline sleeve (6) and are locked and fixed by the locking nuts (4).
2. The splined shaft connection structure according to claim 1, characterized in that: The spacer ring (5) is installed and fixed to the end face of the outer spline of the spline shaft (2) by fastening bolts (7).
3. The splined shaft connection structure according to claim 1, characterized in that: The first spline shaft (1), the second spline shaft (2), the limiting block (3), the locking nut (4), the spacer ring (5), and the spline sleeve (6) are all axisymmetric structures.
4. The splined shaft connection structure according to claim 1, characterized in that: The outer walls of the spline sleeve (6) are respectively provided with external threaded portions on both sides, and the external threaded portions are threadedly connected to the locking nut (4).
5. The splined shaft connection structure according to claim 1, characterized in that: The limiting block (3) has a constraint portion that restricts the axial movement of the spline sleeve (6).