A screw structure for disassembling the tail of an extruder output shaft
By designing the structure of inner and outer spline sleeves and lock nuts at the tail of the output shaft of the extruder, the problem of the screw being unable to be directly disassembled is solved, and the direct disassembly and simplified disassembly of the screw is realized, which is suitable for occasions with high environmental sanitation requirements.
Patent Information
- Application Number
- CN202421447207.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-24
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-06-24
AI Technical Summary
In existing extrusion equipment, the screw cannot be directly extracted from the tail of the output shaft, resulting in a complicated disassembly process, which is difficult to achieve in situations where environmental sanitation requirements are high.
A screw structure for disassemblying the tail of the extruder output shaft is designed. By setting the inner and outer spline sleeves in the hollow output shaft, and using the cooperation of the lock nut and the screw, the direct disassembly of the screw is achieved.
The screw is directly extracted from the tail of the output shaft, simplifying the disassembly process, suitable for occasions with high environmental sanitation requirements, and reducing costs.
Smart Images
Figure CN222742231U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a disassembly structure, in particular to a disassembly screw structure at the tail of an output shaft of an extruder. Background Art
[0002] Extrusion equipment in the prior art generally uses a barrel connected to a gearbox, and the screw in the barrel is inserted into the output shaft of the gearbox. Since the gearbox needs to bear the axial force of the screw, the output shaft has a positioning end face for the screw, so the inner hole in the hollow output shaft is smaller than the outer diameter of the screw, and the screw cannot be pulled out from the output shaft. When the screw needs to be removed, the gearbox must be separated from the barrel, and the gearbox must be separated from the motor coupling at the same time. The screw can only be taken out after the entire gearbox is removed. Therefore, this solution for removing the screw cannot be implemented in some special occasions, such as occasions with high environmental hygiene requirements, the entire extrusion equipment is closed, and there is no space on site to separate the gearbox and then remove the screw. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a screw rod disassembly structure at the tail of an output shaft of an extruder, so that the screw rod can be directly drawn out from the tail of the output shaft.
[0004] The technical solution adopted by the utility model to solve its technical problems is: a screw disassembly structure at the tail of an extruder output shaft, comprising a barrel and a gear box connected to the barrel; a screw is arranged in the barrel, the screw is connected to a lead screw; the screw is also connected to inner and outer spline sleeves; a hollow output shaft is arranged in the gear box, the hollow output shaft is connected to inner and outer spline sleeves; the lead screw is located in the inner and outer spline sleeves; the hollow output shaft transmits torque to the inner and outer spline sleeves, and the inner and outer spline sleeves transmit torque to the screw; shaft retaining rings are arranged at the ends of the inner and outer spline sleeves; a locking nut is buckled in the hollow output shaft, the locking nut bears the axial thrust of the screw; a retaining plate and a hexagonal nut are arranged in sequence on the outside of the locking nut.
[0005] Furthermore, the end faces of the inner and outer spline sleeves of the utility model are provided with screw holes. When disassembling, screw rods are screwed into the screw holes to pull out the inner and outer spline sleeves.
[0006] Furthermore, after the inner and outer spline sleeves of the utility model are drawn out, the locking nut is reversely sleeved on the screw rod and pressed against the end surface of the hollow output shaft.
[0007] Furthermore, after the inner and outer spline sleeves of the utility model are pulled out, the hexagonal nut and the baffle are arranged on the screw rod, and the hexagonal nut is screwed, and the screw rod drives the screw rod to move outward.
[0008] The beneficial effect of the utility model is that it solves the defects existing in the background technology, by making the output shaft hollow, inserting inner and outer spline sleeves in the hollow, connecting the outer spline of the spline sleeve with the inner spline of the output shaft, realizing the transmission of torque to the spline sleeve, connecting the inner spline of the spline sleeve with the outer spline of the screw, realizing the transmission of torque from the spline sleeve to the screw, and at the same time using a shaft retaining ring and a locking nut to fix the axial movement of the spline sleeve; in this way, the axial thrust of the screw can be met and the output shaft can be made hollow with a hollow diameter larger than the screw diameter; not only the hollow output shaft is convenient for disassembling the screw; but also the inner and outer spline sleeves are easy to install and disassemble and can be pulled out of the output shaft at any time; at the same time, the locking nut makes positioning convenient and stable; the screw rod assists in disassembly and the cost is lower. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the utility model;
[0010] Figure 2 This is a schematic diagram of the structure of the utility model after the inner and outer spline sleeves are pulled out;
[0011] Figure 3 It is a schematic diagram of the structure of the utility model after the screw is pulled out from the tail of the output shaft;
[0012] In the figure: 1. screw; 2. barrel; 3. gear box; 4. hollow output shaft; 5. internal and external spline sleeves; 6. shaft retaining ring; 7. locking nut; 8. lead screw; 9. retaining plate; 10. hexagonal nut. DETAILED DESCRIPTION
[0013] Now the utility model is further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0014] like Figure 1 The screw structure for disassembling the tail of an extruder output shaft shown in the figure includes a barrel 2 and a gear box 3 connected to the barrel 2; a screw 1 is arranged in the barrel 2, and the screw 1 is connected to a lead screw 8; the screw 1 is also connected to an inner and outer spline sleeve 5; a hollow output shaft 4 is arranged in the gear box 3, and the hollow output shaft 4 is connected to an inner and outer spline sleeve 5; the lead screw 8 is located in the inner and outer spline sleeve 5; the hollow output shaft 4 transmits torque to the inner and outer spline sleeve 5, and the inner and outer spline sleeve 5 transmits torque to the screw 1; a shaft retaining ring 6 is arranged at the end of the inner and outer spline sleeve 5; the shaft retaining ring 6 prevents the inner and outer spline sleeve 5 from moving to the right; a locking nut 7 is buckled in the hollow output shaft 4, and the locking nut 7 is buckled in the hollow output shaft 4 to prevent the inner and outer spline sleeve 5 from moving to the left, while bearing the axial thrust of the screw 1; a retaining plate 9 and a hexagonal nut 10 are arranged on the outside of the locking nut 7 in sequence.
[0015] When disassembling, Figure 2 As shown, first remove the hexagonal nut 10, the baffle 9, and the locking nut 7 in sequence, and then pull out the inner and outer spline sleeves 5. There are 4 screw holes on the end surface of the spline sleeve. The entire inner and outer spline sleeves 5 can be pulled out by screwing screws into the 4 screw holes.
[0016] Then, the locking nut 7 is reversely sleeved on the screw rod 8 and pressed against the end surface of the hollow output shaft 4, and at the same time, the hexagonal nut 10 and the baffle 9 are installed on the screw rod 8;
[0017] Then, by screwing the hexagonal nut 10, the screw rod 8 is driven to move outward in a straight line, and at the same time, the screw rod 8 drives the screw rod 1 outward. Since the screw rod 1 is mixed with the material in the barrel 2, the screw rod 1 needs to rely on the force of the hexagonal nut 10 and the screw rod 8 to move outward at the beginning. When the screw rod 1 is pulled out for a distance, it is freed from the restraint of the material, and the screw rod 8 and the screw rod 1 can be easily pulled out from the tail of the hollow output shaft 4 at this time. Figure 3 shown.
[0018] The above description only describes the specific implementation methods of the utility model. Various examples do not limit the essential content of the utility model. Ordinary technicians in the relevant technical field can modify or deform the specific implementation methods described above after reading the description without departing from the essence and scope of the utility model.
Claims
1. A screw structure for disassembling the tail of an extruder output shaft, characterized in that: It includes a barrel and a gear box connected to the barrel; a screw is arranged in the barrel, the screw is connected to the lead screw; the screw is also connected to the inner and outer spline sleeves; a hollow output shaft is arranged in the gear box, the hollow output shaft is connected to the inner and outer spline sleeves; the lead screw is located in the inner and outer spline sleeves; the hollow output shaft transmits the torque to the inner and outer spline sleeves, and the inner and outer spline sleeves transmit the torque to the screw; a shaft retaining ring is arranged at the end of the inner and outer spline sleeves; a locking nut is buckled in the hollow output shaft, and the locking nut bears the axial thrust of the screw; a retaining plate and a hexagonal nut are arranged on the outside of the locking nut in sequence.
2. A screw structure for disassembling the tail of an extruder output shaft as claimed in claim 1, characterized in that: The end faces of the inner and outer spline sleeves are provided with screw holes. When disassembling, screw rods are screwed into the screw holes to pull out the inner and outer spline sleeves.
3. A screw structure for disassembling the tail of an extruder output shaft as claimed in claim 2, characterized in that: After the inner and outer spline sleeves are drawn out, the locking nut is reversely sleeved on the screw rod and pressed against the end surface of the hollow output shaft.
4. A screw structure for disassembling the tail of an extruder output shaft as claimed in claim 3, characterized in that: After the inner and outer spline sleeves are drawn out, the hexagonal nut and the baffle are arranged on the screw rod, and the hexagonal nut is screwed, and the screw rod drives the screw rod to move outward.