Spline mandrel of extruder
By designing a detachable spline mandrel structure, the problem of replacing the entire spline mandrel in the prior art is solved, and the convenience and cost reduction of replacement are achieved.
Patent Information
- Application Number
- CN202421108192.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-21
AI Technical Summary
In the existing spline mandrel design, the spline grooves are processed through a lathe, resulting in the spline shaft being fixed in one place. When damaged, the entire spline mandrel needs to be replaced, which increases the cost of use.
A spline mandrel including a sleeve, a base, an insertion shaft, an arcuate groove and a positioning mechanism is designed, and the removable connection between the sleeve and the insertion shaft is achieved through an arcuate groove, an arcuate bump, a positioning mechanism and a fixing mechanism. , allowing the replacement of damaged sleeves without affecting other components.
It realizes convenient replacement of spline grooves, reduces maintenance costs, and improves the connection tightness between the fixing bolts and threaded holes through springs, improving the fixing effect.
Smart Images
Figure CN222185529U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of extruder spline core shafts, in particular to a spline core shaft for an extruder. Background Art
[0002] The extruder spline mandrel is a key component in the extruder, used to transmit power and rotational motion to extrude plastic or other materials. It is usually made of high-strength alloy steel or other wear-resistant materials, with complex geometry and surface treatment to adapt to the high pressure and temperature environment during the extrusion process and ensure precise extruded product size and quality.
[0003] However, the spline grooves on the existing spline mandrels are mostly machined on a lathe, which results in the spline shaft and the mandrel being fixed as one. This design means that when the spline groove on the mandrel is damaged, the user can only replace the entire spline mandrel, which increases the cost of use. Utility Model Content
[0004] The purpose of the utility model is to provide a spline mandrel for an extruder, so as to solve the problem in the prior art that the spline grooves on the existing spline mandrels are mostly machined by lathe processing the mandrels, which results in the spline shaft and the mandrel being fixed as one. This design results in that when the spline groove on the mandrel is damaged, the user can only replace the entire spline mandrel, which increases the cost of use.
[0005] The utility model provides the following technical solution: a spline core shaft of an extruder, comprising a sleeve and a base, a spline groove is provided on the outer side of the sleeve, an arc groove is provided on the inner side of the sleeve, an insertion shaft is fixedly connected to the top of the base, an arc-shaped protrusion is provided on the outer side of the insertion shaft, a core shaft is also fixedly connected to the bottom of the base, a fixing mechanism for fixing the sleeve is provided on the inner side of the base, and a positioning mechanism for positioning the fixing mechanism is provided on the inner side of the sleeve.
[0006] As a preferred embodiment of the above technical solution, the number of the arc grooves is the same as the arc bulges, and the size of the arc grooves matches the arc bulges, and the size of the insertion shaft matches the inner diameter of the sleeve.
[0007] As a preferred embodiment of the above technical solution, the positioning mechanism includes five inner grooves formed on the inner side of the bottom of the sleeve, and a clamping groove is formed on the inner side of the inner groove.
[0008] As a preferred embodiment of the above technical solution, the five inner grooves are distributed at equal angles, and the specifications and sizes of the five inner grooves are the same, and a card slot is opened on the inner side of each inner groove.
[0009] As a preferred embodiment of the above technical solution, the fixing mechanism includes a fixing block fixedly connected to the inner side of the base, a groove opened on the outer side of the base, and a rectangular hole opened on the top of the base, the outer side of the fixing block is fixedly connected to a spring, the end of the spring away from the fixing block is fixedly connected to a skateboard, the top of the skateboard is fixedly connected with a clamping block, the outer side of the skateboard is fixedly connected with a sliding rod, the outer side of the sliding rod is slidably connected with a sliding groove opened on the inner side of the fixing block, the inner side of the groove is provided with a threaded hole connected to the inner side of the base, and the inner side of the threaded hole is threadedly connected with a fixing bolt.
[0010] As a preferred embodiment of the above technical solution, the fixed block is pentagonal, there are five groups of springs, and each group has two, there are five slide plates, card blocks, rectangular holes, slide rods and slide grooves, one end of the five groups of springs are fixedly connected to the outside of the fixed block, and the other ends of the five groups of springs are respectively fixedly connected to the five slide plates, the five card blocks are respectively fixedly connected to the outsides of the five slide plates, and the sizes of the five card blocks match the five card grooves, the five slide plates are respectively distributed on the insides of the five rectangular holes, and the positions of the five slide plates match the five inner grooves, the five slide rods are respectively fixedly connected to the outsides of the five slide plates, and the five slide rods are respectively distributed between each group of two springs, the five slide grooves are all arranged on the inside of the fixed block, and the specifications and sizes of the five slide grooves are the same.
[0011] As a preferred embodiment of the above technical solution, there are five grooves, threaded holes and fixing bolts, the five grooves are all opened on the outside of the base, and the five threaded holes are respectively arranged on the inside of the five grooves, the five threaded holes are all connected to the inside of the base, and the positions of the five threaded holes correspond to the five slides, and the inner sides of the five threaded holes are threadedly connected with fixing bolts.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] The utility model uses a sleeve, a spline groove, an insertion shaft, an arc-shaped protrusion, a positioning mechanism and a fixing mechanism. During installation, the user can insert the insertion shaft into the inner side of the sleeve, and then the slide plate will be inserted into the inner groove on the sleeve. Then the user can rotate the fixing bolt into the threaded hole, and then rotate the fixing bolt. At this time, the fixing bolt will move toward the inner side of the base under the cooperation of the threaded hole. When the fixing bolt moves to a certain position, it will contact the slide plate. At this time, the slide plate will drive the slide bar to move in the slide groove. The movement of the slide plate drives the clamping block to move and squeeze the spring. When the fixing bolt moves to the limit position, the clamping block will be inserted into the clamping groove inside the inner groove. At this time, the installation of the sleeve, the base and the insertion shaft is completed. When the spline groove on the outside of the sleeve is damaged and the sleeve needs to be replaced, the user can rotate the fixing bolt in the opposite direction to remove the fixing bolt from the threaded hole. At this time, the slide plate will return to its original position under the influence of the spring. At this time, the block on the outside of the slide plate will be separated from the slot on the inside of the inner groove. At this time, the user can separate the sleeve from the plug-in shaft, and then install the new sleeve on the plug-in shaft again, and then fix the sleeve again through the fixing mechanism and the positioning mechanism, thereby achieving the effect of facilitating the user to disassemble and replace the damaged spline shaft, and the spring can also improve the tightness of the connection between the fixing bolt and the threaded hole, thereby improving the fixing effect of the fixing bolt on the slide plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 A schematic diagram of a spline mandrel of an extruder from a first-person perspective;
[0015] Figure 2 It is a schematic cross-sectional view of the local structure of a spline mandrel of an extruder;
[0016] Figure 3 It is a schematic diagram of the local structure of a spline mandrel of an extruder from a first perspective;
[0017] Figure 4 for Figure 2 A schematic diagram of the structure enlargement in the middle;
[0018] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;
[0019] Figure 6 for Figure 3 Enlarged schematic diagram of the structure at point C in the middle.
[0020] In the figure: 1, sleeve; 11, inner groove; 12, clamping groove; 2, base; 21, fixing block; 22, groove; 23, rectangular hole; 24, spring; 25, slide plate; 26, clamping block; 27, threaded hole; 28, fixing bolt; 29, slide bar; 210, slide groove; 3, spline groove; 4, arc groove; 5, plug shaft; 6, arc-shaped protrusion; 7, core shaft. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0022] Embodiment 1
[0023] like Figure 1 and Figure 2 As shown, the utility model provides a technical solution: a spline core shaft of an extruder, comprising a sleeve 1 and a base 2, a spline groove 3 is provided on the outer side of the sleeve 1, an arc groove 4 is provided on the inner side of the sleeve 1, an insertion shaft 5 is fixedly connected to the top of the base 2, an arc-shaped protrusion 6 is provided on the outer side of the insertion shaft 5, and a core shaft 7 is also fixedly connected to the bottom of the base 2, a fixing mechanism for fixing the sleeve 1 is provided on the inner side of the base 2, a positioning mechanism for positioning the fixing mechanism is provided on the inner side of the sleeve 1, the number of the arc grooves 4 is the same as the arc-shaped protrusion 6, and the size of the arc grooves 4 matches the arc-shaped protrusion 6, and the size of the insertion shaft 5 matches the inner diameter size of the sleeve 1.
[0024] Through the above technical solution, the user can insert the insertion shaft 5 into the inner side of the sleeve 1, and the slide plate 25 will be inserted into the inner groove 11 on the sleeve 1, thereby completing the preliminary positioning between the sleeve 1 and the insertion shaft 5, thereby facilitating the subsequent fixation of the sleeve 1.
[0025] Embodiment 2
[0026] like Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the utility model provides a technical solution: an extruder spline mandrel, including a sleeve 1 and a base 2, a spline groove 3 is provided on the outer side of the sleeve 1, an arc groove 4 is provided on the inner side of the sleeve 1, a plug shaft 5 is fixedly connected to the top of the base 2, an arc convex block 6 is provided on the outer side of the plug shaft 5, and a mandrel 7 is also fixedly connected to the bottom of the base 2, a fixing mechanism for fixing the sleeve 1 is provided on the inner side of the base 2, and a positioning mechanism for positioning the fixing mechanism is provided on the inner side of the sleeve 1, and the positioning mechanism includes five inner grooves 11 provided on the inner side of the bottom of the sleeve 1, and a card groove 12 is provided on the inner side of the inner groove 11, and the five inner grooves 11 are distributed at equal angles , and the specifications and sizes of the five inner grooves 11 are the same, and a card slot 12 is opened on the inner side of each inner groove 11. The fixing mechanism includes a fixing block 21 fixedly connected to the inner side of the base 2, a groove 22 opened on the outer side of the base 2, and a rectangular hole 23 opened on the top of the base 2. The outer side of the fixing block 21 is fixedly connected to a spring 24, and the end of the spring 24 away from the fixing block 21 is fixedly connected to a slide plate 25. The top of the slide plate 25 is fixedly connected with a card block 26, and the outer side of the slide plate 25 is fixedly connected with a slide bar 29. The outer side of the slide bar 29 is slidably connected with a slide groove 210 opened on the inner side of the fixing block 21, and the inner side of the groove 22 is provided with a screw connected to the inside of the base 2. The threaded hole 27 is provided with a fixing bolt 28 which is threadedly connected to the inner side of the threaded hole 27. The fixing block 21 is pentagonal. There are five groups of springs 24, and each group has two. There are five slide plates 25, card blocks 26, rectangular holes 23, slide bars 29 and slide grooves 210. One end of the five groups of springs 24 is fixedly connected to the outer side of the fixing block 21, and the other ends of the five groups of springs 24 are respectively fixedly connected to the five slide plates 25. The five card blocks 26 are respectively fixedly connected to the outer sides of the five slide plates 25, and the sizes of the five card blocks 26 match the five card grooves 12. The five slide plates 25 are respectively distributed on the inner sides of the five rectangular holes 23, and the positions of the five slide plates 25 match the five inner The five slide bars 29 are respectively fixedly connected to the outside of the five slide plates 25, and the five slide bars 29 are respectively distributed between each group of two springs 24. The five slide grooves 210 are all arranged on the inner side of the fixed block 21, and the specifications and sizes of the five slide grooves 210 are the same. There are five grooves 22, threaded holes 27 and fixing bolts 28. The five grooves 22 are all opened on the outside of the base 2, and the five threaded holes 27 are respectively arranged on the inner sides of the five grooves 22. The five threaded holes 27 are all connected to the inside of the base 2, and the positions of the five threaded holes 27 correspond to the five slide plates 25. The inner sides of the five threaded holes 27 are all threadedly connected with fixing bolts 28.
[0027] Through the above technical solution, when in use, the user can insert the insertion shaft 5 into the inner side of the sleeve 1, and then the slide plate 25 will be inserted into the inner groove 11 on the sleeve 1. Then the user can rotate the fixing bolt 28 into the threaded hole 27, and then rotate the fixing bolt 28. At this time, the fixing bolt 28 will move toward the inner side of the base 2 with the cooperation of the threaded hole 27. When the fixing bolt 28 moves to a certain position, it will contact the slide plate 25. At this time, the slide plate 25 will drive the slide bar 29 to move in the slide groove 210. The movement of the slide plate 25 drives the block 26 to move and squeeze the spring 24. When the fixing bolt 28 moves to the extreme position, the block 26 will be inserted into the slot 12 inside the inner groove 11. At this time, the sleeve 1 is in contact with the base 2 and After the installation of the plug-in shaft 5 is completed, when the spline groove 3 on the outside of the sleeve 1 is damaged and the sleeve 1 needs to be replaced, the user can reversely rotate the fixing bolt 28 to remove the fixing bolt 28 from the threaded hole 27. At this time, the slide plate 25 will return to its original position under the influence of the spring 24. At this time, the block 26 on the outside of the slide plate 25 will be separated from the slot 12 on the inside of the inner groove 11. At this time, the user can separate the sleeve 1 from the plug-in shaft 5, and then install the new sleeve 1 on the plug-in shaft 5 again, and then fix the sleeve 1 again through the fixing mechanism and the positioning mechanism, so as to achieve the effect of facilitating the user to replace the damaged spline groove 3 and sleeve 1, thereby improving the convenience of use while reducing the cost of replacement.
[0028] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.
Claims
1. A spline mandrel for an extruder, comprising a sleeve (1) and a base (2), wherein the outer side of the sleeve (1) is provided with a spline groove (3), the inner side of the sleeve (1) is provided with an arc groove (4), the top of the base (2) is fixedly connected with an insert shaft (5), and the outer side of the insert shaft (5) is provided with an arc convex block (6), Features: The bottom of the base (2) is also fixedly connected to a core shaft (7), the inner side of the base (2) is provided with a fixing mechanism for fixing the sleeve (1), and the inner side of the sleeve (1) is provided with a positioning mechanism for positioning the fixing mechanism.
2. An extruder spline mandrel according to claim 1, Features: The number of the arc-shaped grooves (4) is the same as the arc-shaped protrusions (6), and the size of the arc-shaped grooves (4) matches the size of the arc-shaped protrusions (6), and the size of the insertion shaft (5) matches the inner diameter size of the sleeve (1).
3. The extruder spline mandrel according to claim 1, Features: The positioning mechanism comprises five inner grooves (11) formed on the inner side of the bottom of the sleeve (1), and a clamping groove (12) is formed on the inner side of the inner groove (11).
4. An extruder spline mandrel according to claim 3, Features: The five inner grooves (11) are distributed at equal angles, and the specifications and dimensions of the five inner grooves (11) are all the same. A clamping groove (12) is provided on the inner side of each inner groove (11).
5. The extruder spline mandrel according to claim 1, Features: The fixing mechanism comprises a fixing block (21) fixedly connected to the inner side of the base (2), a groove (22) provided on the outer side of the base (2), and a rectangular hole (23) provided on the top of the base (2); the outer side of the fixing block (21) is fixedly connected to a spring (24); the end of the spring (24) away from the fixing block (21) is fixedly connected to a slide plate (25); the top of the slide plate (25) is fixedly connected to a clamping block (26); the outer side of the slide plate (25) is fixedly connected to a sliding rod (29); the outer side of the sliding rod (29) is slidably connected to a sliding groove (210) provided on the inner side of the fixing block (21); the inner side of the groove (22) is provided with a threaded hole (27) communicating with the inner side of the base (2); the inner side of the threaded hole (27) is threadedly connected to a fixing bolt (28).
6. An extruder spline mandrel according to claim 5, Features: The fixed block (21) is pentagonal, the springs (24) are in five groups, and each group has two springs. The slide plate (25), the clamping block (26), the rectangular hole (23), the slide bar (29) and the slide groove (210) are in five groups. One end of the five groups of springs (24) is fixedly connected to the outside of the fixed block (21), and the other ends of the five groups of springs (24) are respectively fixedly connected to the five slide plates (25). The five clamping blocks (26) are respectively fixedly connected to the outside of the five slide plates (25), and the five clamping blocks ( The size of the five slide plates (26) matches the five card slots (12), the five slide plates (25) are respectively distributed on the inner sides of the five rectangular holes (23), and the positions of the five slide plates (25) match the five inner slots (11), the five slide bars (29) are respectively fixedly connected to the outer sides of the five slide plates (25), and the five slide bars (29) are respectively distributed between each group of two springs (24), the five slide slots (210) are all arranged on the inner side of the fixed block (21), and the specifications and sizes of the five slide slots (210) are the same.
7. The extruder spline mandrel according to claim 5, Features: There are five grooves (22), threaded holes (27) and fixing bolts (28), the five grooves (22) are all opened on the outside of the base (2), and the five threaded holes (27) are respectively arranged on the inside of the five grooves (22), the five threaded holes (27) are all connected to the inside of the base (2), and the positions of the five threaded holes (27) correspond to the five slide plates (25), and the insides of the five threaded holes (27) are all threadedly connected with fixing bolts (28).