Novel spline housing
By adding a reinforced end and an improved split ring and cap structure at the end of the mandrel body, the problem that traditional spline sleeves cannot bear large torque is solved, the torsional strength and installation stability are improved, and the production of extruders is enhanced Efficiency and material mixing effect.
Patent Information
- Application Number
- CN202421027284.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The traditional mandrel body and spline sleeve cannot bear large torque, resulting in insufficient plasticization and mixing of materials at high screw speeds, and are not firmly fixed, affecting the production efficiency and product quality of the extruder.
A new spline sleeve was designed, by adding reinforcement ends to the end of the mandrel body, an improved split ring and cap structure was set up to increase the torsion resistance of the connecting part, and a firmer locking was achieved through the beveled fit. Fix it to prevent the mandrel body from moving.
It improves the torsional strength and installation stability of the mandrel body, adapts to the use of extruders at high speeds, ensures that the materials are fully plasticized and mixed, and improves production efficiency and product quality.
Smart Images
Figure CN222163294U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of extruder equipment, and specifically relates to a novel spline sleeve. Background Art
[0002] Improving production efficiency is an important goal of the development and research of co-rotating twin-screw extruders. It can be achieved by increasing the screw speed, enhancing the plasticizing and mixing capabilities, etc. At the same screw speed, increasing the filling degree of the material in the screw groove can greatly increase the conveying volume. As the screw groove filling degree increases, the shearing effect on the material in the screw groove is reduced, so the screw speed can be further increased without causing the material temperature to rise too high and degrade, thereby ensuring the product quality while further improving the production capacity of the extruder; Correspondingly, the plasticizing and mixing capabilities of the screw are also required to increase, which requires the screw (i.e., various threaded elements are installed at the outer end of the mandrel body) to be able to withstand greater torque. At high screw speeds, the residence time of the material in the extruder is reduced, which makes it easy for the material to be plasticized, melted, and mixed insufficiently; For this reason, it is necessary to appropriately increase the screw length, which will inevitably lead to an increase in the actual load torque and power of the twin-screw extruder, resulting in the traditional mandrel body and spline sleeve (such as Figure 7 , Figure 8 and Fig. 9 The conventional mandrel body has a small end diameter and cannot bear a large torque, and the corresponding conventional spline sleeve cannot play a fixing role. Utility Model Content
[0003] The purpose of the utility model is to provide a novel spline sleeve to solve the problems raised in the above background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] A novel spline sleeve, comprising:
[0006] A spline sleeve is installed between the core shaft body and the output shaft of the transmission box, and both ends of the spline sleeve are threadedly connected with parallel caps. Both ends of the spline sleeve are also provided with split rings, and the split rings are located inside the corresponding parallel caps. When in use, the parallel caps on both sides are rotated respectively, and then the split rings are driven to tighten toward the two ends of the spline sleeve respectively, thereby achieving the fixation of the core shaft body and the output shaft of the transmission box through the spline sleeve.
[0007] Preferably, the end of the core shaft body close to the spline sleeve has a reinforced end, that is, the diameter of the connection part with the spline sleeve is larger than the original diameter of the connection part with the spline sleeve, so that the diameter of the reinforced end becomes larger, thereby improving the torsion resistance of the improved connection part and adapting it to the use of the extruder after the increment.
[0008] Preferably, a bevel one is provided on the outer side of the split ring, and the split ring includes two groups of symmetrically arranged arc rings, which are arranged in a semicircular shape, that is, the diameter of the end of the split ring away from the spline sleeve is smaller than the diameter of the end of the split ring close to the spline sleeve, and a bevel two matching with the bevel one is provided on the inner side of the end of the cap close to the split ring, so that when the cap is tightened, the cap is rotated in the direction close to the spline sleeve, so that the bevel two of the cap continuously squeezes the bevel one, so that the cap is firmly stuck on the core shaft body, that is, the bevel two of the cap obtains an interference fit to clamp the core shaft body, thereby increasing the cross-sectional diameter of the outer end of the core shaft body, realizing locking and fixation, and avoiding the movement of the core shaft body during use.
[0009] Preferably, a countersunk screw is installed inside one end of the spindle body, and the countersunk screw is located between the spindle body and the output shaft of the transmission box.
[0010] Preferably, an adjustment pad is further provided between the spindle body and the countersunk screw.
[0011] Compared with the prior art, the beneficial effects of the utility model are:
[0012] The utility model provides a reinforced end at the end of the core shaft body close to the spline sleeve, so that the diameter of the end of the core shaft body is increased, thereby improving the torsion resistance of the improved connection part, improving the strength, and being suitable for use with an extruder after the increment. The improved split ring and the parallel cap cooperate with the spline sleeve to better connect the core shaft body and the output shaft of the transmission box, thereby improving the installation stability, thereby avoiding the movement of the core shaft body during use, improving the torsion resistance of the core shaft body, and being conducive to the use of the extruder after the material is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a partial enlarged schematic diagram of the mandrel body of the utility model;
[0015] Figure 3 It is a schematic diagram of the connection between the split ring and the parallel cap of the utility model;
[0016] Figure 4 It is a cross-sectional view of the cap of the utility model;
[0017] Figure 5 It is a cross-sectional view of the split ring of the utility model;
[0018] Figure 6 It is a side view of the split ring of the utility model;
[0019] Figure 7It is a schematic diagram of the overall structure of the prior art;
[0020] Figure 8 A schematic diagram of a spindle body of the prior art;
[0021] Fig. 9 It is a partial structural schematic diagram of a spline sleeve in the prior art;
[0022] In the figure: 10, spindle body; 20, transmission box output shaft; 30, spline sleeve; 31, countersunk screw; 32, adjustment pad; 40, split ring; 41, inclined surface 1; 50, parallel cap; 51, inclined surface 2. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] Example:
[0025] See also Figure 1-Figure 6 As shown, a new spline sleeve comprises:
[0026] A spline sleeve 30 is installed between the core shaft body 10 and the transmission box output shaft 20, and both ends of the spline sleeve 30 are threadedly connected with a cap 50. Both ends of the spline sleeve 30 are also provided with a split ring 40. The split ring 40 is located inside the corresponding cap 50. When in use, the caps 50 on both sides are rotated respectively, and then the split ring 40 is driven to tighten toward the two ends of the spline sleeve 30 respectively, thereby achieving the fixation of the core shaft body 10 and the transmission box output shaft 20 through the spline sleeve 30.
[0027] refer to Figure 1-Figure 6 As shown, the end of the core shaft body 10 close to the spline sleeve 30 has a reinforced end, that is, the diameter of the part connected with the spline sleeve 30 is larger than the original diameter of the part connected with the spline sleeve 30, so that the diameter of the reinforced end becomes larger, thereby making the torsion resistance of the improved connecting part higher, adapting to the use of the incremental extruder, and also improving production efficiency.
[0028] refer to Figure 1-Figure 6As shown, a bevel 1 41 is provided on the outer side of the split ring 40, and the split ring 40 includes two groups of symmetrically arranged arc rings, which are arranged in a semicircular shape, that is, the diameter of the end of the split ring 40 away from the spline sleeve 30 is smaller than the diameter of the end of the split ring 40 close to the spline sleeve 30, and a bevel 2 51 matching with the bevel 1 41 is provided on the inner side of the end of the cap 50 close to the split ring 40, so that when the cap 50 is tightened, the cap 50 is rotated in the direction close to the spline sleeve 30, so that the bevel 2 51 of the cap 50 continuously squeezes the bevel 1 41, so that the cap 50 is firmly stuck on the core shaft body 10, that is, the bevel 2 51 of the cap 50 obtains an interference fit to clamp the core shaft body 10, thereby increasing the cross-sectional diameter (the diameter of the dangerous cross section) of the outer end of the core shaft body 10, achieving a locking and fixing effect, and preventing the core shaft body 10 from moving during use.
[0029] refer to Figure 1-Figure 6 As shown, a countersunk screw 31 is installed inside one end of the spindle body 10 , and the countersunk screw 31 is located between the spindle body 10 and the transmission box output shaft 20 .
[0030] refer to Figure 1-Figure 6 As shown, an adjustment pad 32 is also provided between the mandrel body 10 and the countersunk screw 31. The threaded element (internal spline) is installed on the mandrel (external spline). Different threaded elements (different types and lengths of threaded elements are installed on the mandrel one by one) are installed on the mandrel to finally form the screw required for processing the material. The front end of the mandrel has an internal screw hole (to install the screw back cap and tighten the threaded element), and the rear end of the mandrel has an internal screw hole. The countersunk screw 31 is used to fix the adjustment pad 32 to the rear end of the mandrel. When the screw pushes the material forward, the material will press against the screw. The rod has a reaction force, which acts on the core shaft through the threaded element and then acts on the output shaft A and output shaft B of the transmission box. Due to the error between the two core shafts in the length direction, there is an error in the length of the transmission box output shaft (A, B shaft) extending out of the transmission box body. In order to make the clearance on both sides of the thread of the threaded element the same when working, and to press against the A and B shafts of the transmission box at the same time, we will use adjustment pads to adjust the axial size, so that the two core shafts are always pressed against the A and B shafts of the transmission box when working, and to ensure that the clearance on both sides of the threaded element is the same.
[0031] The utility model provides a reinforced end at the end of the core shaft body 10 near the spline sleeve 30, so that the diameter of the end of the core shaft body 10 is increased, thereby improving the torsion resistance of the improved connecting portion and improving the strength, so as to adapt to the use of the extruder after the increment. The improved split ring 40 and the cap 50 cooperate with the spline sleeve 30 to better connect the core shaft body 10 and the transmission box output shaft 20, thereby improving the installation stability, thereby avoiding the movement of the core shaft body 10 during use, improving the torsion resistance of the core shaft body 10, and facilitating the use of the extruder after the material is increased.
[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A new type of spline sleeve, It is characterized in that include: A spindle body (10) and a transmission box output shaft (20), a spline sleeve (30) is installed between the spindle body (10) and the transmission box output shaft (20), both ends of the spline sleeve (30) are threadedly connected with a cap (50), and both ends of the spline sleeve (30) are also provided with a split ring (40), and the split ring (40) is located inside the corresponding cap (50); The end of the mandrel body (10) close to the spline sleeve (30) has a reinforced end; The outer side of the split ring (40) is provided with a first bevel (41), the split ring (40) comprises two groups of symmetrically arranged arc rings, the arc rings are arranged in a semicircular shape, and the inner side of the cap (50) close to one end of the split ring (40) is provided with a second bevel (51) matching with the first bevel (41).
2. A new spline sleeve according to claim 1, Features: A countersunk screw (31) is installed inside one end of the spindle body (10), and the countersunk screw (31) is located between the spindle body (10) and the transmission box output shaft (20).
3. A new spline sleeve according to claim 2, Features: An adjustment pad (32) is also provided between the spindle body (10) and the countersunk screw (31).