Quickly dismountable structure combined expansion pin for positioning large parts of extruder

Abstract

The utility model belongs to extruder production and manufacturing technical field, concretely relates to a quick dismounting structure combination expansion pin for positioning of extruder large -scale parts. Including inner taper shaft (1), expansion sleeve (2), hollow shaft (3), anti -rotation pin (4), central shaft (5), nut (6), sleeve (7), bolt (8). The utility model solves the positioning pin installation positioning and the difficult dismounting, the low efficiency, the artificial not easy operation's technological problem in the process of large -scale parts assembly. Meanwhile can make up the positioning precision deviation problem of the size deviation of the two parts pin holes of mutual assembly to some extent.

Description

Technical Field

[0001] This utility model belongs to the field of extrusion press manufacturing technology, specifically relating to a quick-disassembly and assembly structure of expansion pins for positioning large extrusion press components. Background Technology

[0002] In the manufacturing process of extrusion presses in the petrochemical industry, there are steps involving the positioning and fixing of large components using locating pin holes during assembly, such as the assembly of side plates and pump bodies for large gear pumps, and the assembly of barrels and connecting sets. Due to errors in component manufacturing and assembly, as well as the influence of the self-weight and rigidity of large components, there are often varying degrees of eccentricity and hole size deviations between the two locating holes. Traditional locating pins are in the form of straight cylinders, making it difficult to quickly match the size deviations and misalignments of the pin holes caused by different situations. Furthermore, during the installation and removal of locating pins, there are problems with the locating pins being stuck and difficult to install and remove. This severely restricts the efficiency of positioning and installation, increases the difficulty of manual operation, and poses a risk of damaging the locating pins and pin holes. Utility Model Content

[0003] This invention aims to provide a quick-assembly and disassembly assembly of expansion pins for positioning large components of extruders. This invention solves the problems of difficult installation, positioning, and disassembly of positioning pins during the assembly of large components, resulting in low efficiency, long preparation time for auxiliary processes, and difficulty in manual operation. It can also, to a certain extent, compensate for positioning accuracy deviations caused by dimensional differences in the pin holes of two assembled components.

[0004] According to one aspect of this application, a quick-release structural combination expansion pin for positioning large components of an extruder is provided, including an inner tapered shaft 1, an expansion sleeve 2, a hollow shaft 3, an anti-rotation pin 4, a central shaft 5, a nut 6, a sleeve 7, and a bolt 8.

[0005] The inner conical shaft 1 is provided with a positioning ring structure;

[0006] The inner wall of the expansion sleeve 2 is provided with an annular groove structure.

[0007] The inner conical shaft 1 is installed in the expansion sleeve 2, and the positioning ring structure of the inner conical shaft 1 is installed in the annular groove structure of the expansion sleeve 2. The outer conical surface A of the inner conical shaft 1 and the inner conical surface B1 of the expansion sleeve 2 cooperate with each other, and the inner conical shaft 1 can rotate relative to the expansion sleeve 2.

[0008] When the inner conical shaft 1 moves axially toward the bottom end, the expansion sleeve 2 will also move toward the bottom end under the action of the positioning ring structure;

[0009] When the inner conical shaft 1 moves axially toward the top of the expansion sleeve 2 relative to the expansion sleeve 2, the bottom of the expansion sleeve 2 will expand under the action of the conical surface A / B1. When the inner conical shaft 1 moves axially toward the bottom of the expansion sleeve 2 relative to the expansion sleeve 2, the bottom of the expansion sleeve 2 will contract.

[0010] The hollow shaft 3 has an outer conical surface C at its front end, and the expansion sleeve 2 has an inner conical surface B2 in its inner cavity. The outer conical surface of the hollow shaft 3 and the inner conical surface B2 of the expansion sleeve 2 are correspondingly matched.

[0011] The diameter of the expansion sleeve 2 gradually decreases from both ends to the middle.

[0012] The inner wall of the expansion sleeve 2 is provided with positive and negative conical surfaces, and the outer wall has staggered cuts.

[0013] The extruder's large components are positioned using sleeves 7 and bolts 8, and the expansion pins are designed for quick disassembly and reassembly.

[0014] Specifically, the inner conical shaft is installed at the bottom of the expansion sleeve, and its locating ring is installed in the annular groove at the bottom of the expansion sleeve, allowing the inner conical shaft to drive the expansion sleeve to move axially to the top. The inner conical shaft can rotate relative to the expansion sleeve along the axis. The outer conical surface of the inner conical shaft mates with the bottom conical surface of the expansion sleeve, allowing the inner conical shaft to move upward relative to the expansion sleeve. When the inner conical shaft moves upward relative to the expansion sleeve, the expansion sleeve expands under the action of the conical surface, and the outer diameter of the expansion sleeve increases. The hollow shaft is installed at the top of the expansion sleeve, and the outer conical surface of the hollow shaft mates with the inner conical surface of the expansion sleeve. When the hollow shaft moves towards the bottom of the expansion sleeve relative to it, the expansion sleeve expands, and the outer diameter of the expansion sleeve increases. The central shaft is installed in the hollow shaft, and its lower end is connected to the threaded rod of the inner conical shaft, making it an integral part of the inner conical shaft. An anti-rotation pin is installed on the hollow shaft and the central shaft to prevent the central shaft from rotating. The nut is installed on the central shaft. When the nut is pre-tightened, the central shaft drives the inner conical shaft to move to the top. At the same time, the hollow shaft moves relative to the bottom, and the outer diameter of the expansion sleeve expands under the action of the conical surface. When disassembly is required, first remove the nut, then install the sleeve on the hollow shaft, install the bolt on the sleeve, and tighten the bolt. After that, the central shaft drives the inner tapered shaft to move towards the bottom, causing the expansion sleeve to contract and the inner diameter of the expansion sleeve to return to its original size.

[0015] In the aforementioned quick-release and detachable expansion pin assembly for positioning large components of the extruder, the inner conical shaft is provided with an outer conical surface A, and the inner cavity of the expansion sleeve is provided with an inner conical surface B1. The outer conical surface A and the inner conical surface B1 are correspondingly fitted. The diameter of the expansion sleeve gradually decreases from the outer end to the middle. Both the surfaces of conical surfaces A and B1 are hardened and polished.

[0016] In the aforementioned quick-release structure combination expansion pin for positioning large components of the extruder, the inner conical shaft is provided with a positioning ring structure, and the inner wall of the expansion sleeve is provided with an annular groove structure.

[0017] In the aforementioned quick-release and detachable expansion pin assembly for positioning large components of the extruder, the hollow shaft has an outer conical surface C at its front end, and the inner cavity of the expansion sleeve has an inner conical surface B2, with the outer conical surface and the inner conical surface B2 correspondingly engaging. The diameter of the expansion sleeve gradually decreases from its outer end to its middle section. Both the surfaces of conical surface C and B2 are hardened and polished.

[0018] The advantages of this invention are: The expansion sleeve achieves diameter variation by incorporating two sections of positive and negative conical surfaces. The threaded mechanism and the elasticity of the expansion sleeve maintain the tightening force or allow for automatic springback. The expansion pin enables rapid tightening, positioning, and contraction, solving the problems of difficult pin hole positioning, low efficiency, long preparation time for auxiliary processes, and difficult manual operation during the assembly of large components. Specific beneficial effects include:

[0019] Compared to traditional locating pins, this utility model's expansion pin is easier to install. Through the expansion and contraction of the expansion sleeve, the assembly and positioning of large components, as well as the disassembly of the locating pin, can be completed quickly. This effectively avoids the jamming and jamming issues that occur during the assembly and disassembly of traditional locating pins. A single person can complete the assembly and disassembly of the expansion pin, significantly increasing the efficiency of the positioning process for large components' mating pin holes and reducing time and labor costs.

[0020] Compared to the traditional cylindrical locating pin with a single outer diameter, the expansion pin of this invention can fully expand to compensate for the diameter of the pin holes of the two assembled components, achieving a gapless fit between the expansion pin and the pin hole, making the assembly and positioning of large components more precise. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the expansion pin structure of this utility model.

[0022] Figure 2 This is a structural diagram of the expansion pin of this utility model during disassembly.

[0023] Figure 3 This is a schematic diagram of the installation of the expansion pin of this utility model.

[0024] Figure 4 This is a schematic diagram of the disassembly of the expansion pin of this utility model.

[0025] Figure 5 This is a schematic diagram of the expansion sleeve structure of the expansion pin of this utility model.

[0026] The components include: 1. Inner tapered shaft; 2. Expansion sleeve; 3. Hollow shaft; 4. Anti-rotation pin; 5. Central shaft; 6. Nut; 7. Sleeve; 8. Bolt. Detailed Implementation

[0027] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0028] Example 1

[0029] A quick-release and detachable expansion pin structure for positioning large components of an extruder, comprising, for example: Figure 1 and Figure 2 The following are included:

[0030] 1. Inner tapered shaft; 2. Expansion sleeve; 3. Hollow shaft; 4. Anti-rotation pin; 5. Central shaft; 6. Nut; 7. Sleeve; 8. Bolt.

[0031] The aforementioned inner conical shaft 1 is installed in the expansion sleeve 2, and its positioning ring is installed in the annular groove of the expansion sleeve 2. Its outer conical surface A and the inner conical surface B1 of the expansion sleeve 2 cooperate with each other. The inner conical shaft 1 can rotate relative to the expansion sleeve 2. When the inner conical shaft 1 moves axially towards the bottom end, the expansion sleeve 2 will also move towards the bottom end under the action of the positioning ring. If the inner conical shaft 1 moves axially towards the top end of the expansion sleeve 2 relative to the expansion sleeve 2, the bottom end of the expansion sleeve 2 will expand under the action of the conical surfaces A / B1. If it moves in the opposite direction, the bottom end of the expansion sleeve 2 will contract.

[0032] The aforementioned hollow shaft 3 is installed at the top of the expansion sleeve 2. Its outer conical surface C and the inner conical surface B2 of the expansion sleeve 2 cooperate with each other. When the hollow shaft 3 and the expansion sleeve 2 move axially relative to each other, the top of the expansion sleeve 2 will expand or contract under the interaction of the conical surfaces C / B2.

[0033] The aforementioned conical surfaces A / B1 and C / B2 have all undergone hardening and polishing treatment.

[0034] The aforementioned central shaft 5 is installed in the hollow shaft 3, and the anti-rotation pin 4 is installed between them, so that the central shaft 5 and the hollow shaft 3 cannot rotate relative to each other. A long groove is provided on the central shaft 5 so that the central shaft 5 and the hollow shaft 3 can move axially relative to each other.

[0035] The aforementioned central shaft 5 and the inner conical shaft 1 are connected by a thread to form a whole. If the central shaft 5 moves axially, it can drive the inner conical shaft 1 to move axially as well.

[0036] The aforementioned nut 6 is mounted on the central shaft 5. Rotating the nut 6 can cause the central shaft 5 and the hollow shaft 3 to move axially relative to each other, thereby causing the expansion sleeve 2 to expand.

[0037] The aforementioned sleeve 7 is used when the expansion pin needs to be disassembled. First, remove the nut 6, install the sleeve 7 on the hollow shaft 3, then install the bolt 8 on the sleeve, and tighten the bolt 8. This will cause the central shaft 5 to move axially relative to the hollow shaft 3, thereby causing the expansion sleeve 2 to contract.

[0038] The aforementioned inner conical shaft 1 and hollow shaft 3 are manufactured from high-rigidity materials. Their outer conical surfaces correspond one-to-one with the inner conical surfaces of the expansion sleeve 2, and their dimensions and angles are consistent. The conical surfaces need to be hardened and polished.

[0039] The two inner conical surfaces B1 and B2 of the aforementioned expansion sleeve 2 are in opposite directions and have equal lengths.

[0040] The aforementioned expansion sleeve 2 is made of a material with high elasticity and rigidity, such as 65Mn spring steel. An opening groove is processed by wire cutting and other processing methods. A spring-loaded hole is left at the deepest point of the opening groove along the axial direction. The spring-loaded hole provides the expansion sleeve with a margin for deformation. In its natural state, the diameter of the outer cylindrical surface of the expansion sleeve is slightly smaller than the diameter of the pin hole.

[0041] The working principle of this utility model is as follows: After the expansion pin is assembled as a whole, in its natural state, the diameter of the expansion sleeve 2 is slightly smaller than the diameter of the pin hole. After the expansion pin is inserted into the pin hole as a whole, use a standard wrench to tighten the nut 6 to make the expansion pin expand into place. When removing the expansion pin, first remove the nut 6, and use the sleeve 7 and bolt 8 to push open the central shaft 5 and the inner conical shaft 1, so that the expansion sleeve 2 contracts back to its natural state.

[0042] Figure 3 and Figure 4 It shows the expansion pin in the state when installed in a large component, and in the state when disassembled.

[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A quick-release and detachable expansion pin structure for positioning large components of an extruder, characterized in that... Includes inner tapered shaft (1), expansion sleeve (2), hollow shaft (3), anti-rotation pin (4), central shaft (5), nut (6), sleeve (7), and bolt (8); The inner conical shaft (1) is provided with a positioning ring structure; The inner wall of the expansion sleeve (2) is provided with an annular groove structure; The inner conical shaft (1) is installed in the expansion sleeve (2), and the positioning ring structure of the inner conical shaft (1) is installed in the annular groove structure of the expansion sleeve (2). The outer conical surface A of the inner conical shaft (1) and the inner conical surface B1 of the expansion sleeve (2) cooperate with each other, and the inner conical shaft (1) can rotate relative to the expansion sleeve (2). The hollow shaft (3) has an outer conical surface C at its front end, and the inner cavity of the expansion sleeve (2) has an inner conical surface B2. The outer conical surface of the hollow shaft (3) and the inner conical surface B2 of the expansion sleeve (2) are correspondingly matched. An anti-rotation pin (4) is provided between the hollow shaft (3) and the central shaft (5); The hollow shaft (3) and the central shaft (5) are provided with mounting nuts (6) at their top ends.

2. The quick-release and detachable expansion pin structure for positioning large components of an extruder according to claim 1, characterized in that, When the inner conical shaft (1) moves axially toward the bottom end, the expansion sleeve (2) will also move toward the bottom end under the action of the positioning ring structure; If the inner conical shaft (1) moves axially toward the top of the expansion sleeve (2) relative to the expansion sleeve (2), the bottom of the expansion sleeve (2) will expand under the action of the conical surface A / B1. If the inner conical shaft (1) moves axially toward the bottom of the expansion sleeve (2) relative to the expansion sleeve (2), the bottom of the expansion sleeve (2) will contract.

3. The quick-release and detachable expansion pin structure for positioning large components of an extruder according to claim 1, characterized in that, The diameter of the expansion sleeve (2) gradually decreases from both ends to the middle.

4. The quick-release and detachable expansion pin structure for positioning large components of an extruder according to claim 1, characterized in that, The inner wall of the expansion sleeve (2) is provided with positive and negative conical surfaces, and the outer wall has staggered cuts.

5. The quick-release and detachable expansion pin structure for positioning large components of an extruder according to claim 1, characterized in that, The extruder's large component positioning is achieved using a sleeve (7) and bolts (8) to quickly disassemble the expansion pins of the quick-release structure combination.

Images