Anti-loose positioning pin for winding device

Abstract

The utility model relates to positioning pin technical field, concretely is a kind of winding equipment anti-loose positioning pin, including connecting pin, its top is fixed with outer expansion pin, and shallow recess is equipped in the connecting place of both;Through thread hole is set in the middle part of connecting pin, and connecting screw rod is installed in its top thread, and the top fixed conical block of connecting screw rod, and the top of conical block is provided with hexagonal hole and is contained in outer expansion pin;Limiting plate is equipped in the middle part of the outside of connecting pin, and two-way screw rod is installed in its bottom thread;Hexagonal groove is equipped in the middle part of two-way screw rod, and the assembling screw hole of the bottom end of conical positioning block is connected in the lower half segment thread;Limiting slot and slot are equipped in the top of conical positioning block, and limiting slot is embedded in limiting plate, and slot is inserted connecting pin lower end;Conical positioning block is covered with protective washer, and the convex point of its outer surface penetrates washer;The utility model is through double locking structure and modular design, realizes the reliable connection and anti-loose between equipment fixed and movable component, and simultaneously has the advantages of installation flexible, strong adaptability.

Description

Technical Field

[0001] This utility model relates to the field of positioning pin technology, specifically to an anti-loosening positioning pin for a winding device. Background Technology

[0002] In various industrial applications and equipment operations, winding equipment is a common device, mainly used for winding, releasing, and storing flexible components such as cables, strips, or hoses. To ensure the safety and controllability of the winding process and the stability and reliability of the winding state, a mechanism that can effectively lock the winding shaft or related moving parts is needed. Anti-loosening positioning pins are key components that are widely used in this context. Their core function is to be inserted into the corresponding hole in the equipment structure when fixation is required, and to prevent the parts from moving or loosening accidentally through mechanical interlocking. This ensures that the equipment maintains a predetermined position when stationary or in a specific working state, avoiding operational failures, material spillage, or potential safety risks caused by sudden displacement or loosening.

[0003] Traditional locating pins typically rely on simple interference fits or threaded locking, which offer limited anti-loosening capabilities. Especially when subjected to strong vibrations or impact loads over long periods, they are prone to reduced connection reliability due to material stress relaxation or loosening of the threaded pair. Furthermore, the structural design of existing technologies is often relatively fixed, lacking necessary modularity and adaptability. A single pin specification can usually only correspond to one specific installation method, making it impossible to flexibly choose and switch between independent additional fixing blocks and direct integrated installation based on actual installation conditions and space constraints. This limits their application scope and increases the cost of equipment. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-loosening positioning pin for a winding device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A locking pin for a winding device includes a connecting pin, an expanding pin fixedly installed at the top of the connecting pin, a shallow groove formed by the connection between the expanding pin and the connecting pin and the shaft, a threaded hole in the middle of the connecting pin, the threaded hole being through-hole, and the end of a connecting screw threadedly installed at the through-hole of the threaded hole at the top of the connecting pin, a conical block fixedly installed at the top of the connecting screw, the conical block having a hexagonal hole at its top, and the conical block being accommodated inside the expanding pin.

[0006] Preferably, a limiting plate is fixedly installed in the middle of the outer side of the connecting pin, and the upper half of a bidirectional screw is threadedly installed at the threaded hole at the bottom end of the connecting pin.

[0007] Preferably, the bidirectional screw has a through hexagonal groove in the middle, and the lower half of the bidirectional screw is threaded into the assembly screw hole.

[0008] Preferably, the assembly screw hole is located at the bottom center of the conical positioning block, and a limiting groove is located at the top center of the conical positioning block, with a slot in the center of the limiting groove.

[0009] Preferably, the slot communicates with the assembly screw hole, a limiting plate is embedded in the limiting groove, and a connecting pin located on the lower side of the limiting plate is inserted into the slot.

[0010] Preferably, the outer surface of the conical positioning block is covered with a protective washer, and the outer surface of the conical positioning block is fixed with a number of protrusions at intervals, the protrusions respectively penetrating through the protective washer.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This type of anti-loosening positioning pin for winding equipment uses a connecting screw to drive a conical block to squeeze the outward expansion pin. The unique shallow groove structure at the connection between the outward expansion pin and the connecting pin guides it to undergo precise radial elastic expansion, achieving expansion-type fixing within the mounting holes of the movable structure of the equipment. This fixing method can generate uniform contact pressure and effectively overcome the loosening problem caused by vibration.

[0012] This type of anti-loosening positioning pin for winding equipment adopts a modular design, making the conical positioning block an independently selectable component. It can be assembled with the connecting pin as a whole using a bidirectional screw, or the corresponding limiting groove, slot and assembly screw hole can be directly machined on the equipment body to omit this independent component. This design provides high installation flexibility and can adapt to different equipment structures and installation space requirements. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of the conical block of this utility model; Figure 3 This is a schematic diagram of the connecting pin of this utility model; Figure 4 This is a schematic diagram of the conical positioning block of this utility model.

[0014] In the diagram: 101, connecting pin; 102, outward expansion pin; 103, shallow groove; 104, threaded hole; 105, connecting screw; 106, conical block; 107, hexagonal hole; 108, limiting plate; 109, double-acting screw; 110, hexagonal groove; 111, assembly screw hole; 112, conical positioning block; 113, limiting groove; 114, slot; 115, protective washer; 116, protrusion. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4 As shown, this utility model provides a technical solution: A locking pin for a winding device includes a connecting pin 101. An expanding pin 102 is fixedly installed at the top of the connecting pin 101. The connection between the expanding pin 102 and the connecting pin 101 is recessed towards the axis to form a shallow groove 103. A threaded hole 104 is provided in the middle of the connecting pin 101. The threaded hole 104 is through-hole. The end of a connecting screw 105 is threadedly installed at the through-hole of the threaded hole 104 at the top of the connecting pin 101. A conical block 106 is fixedly installed at the top of the connecting screw 105. A hexagonal hole 107 is provided at the top of the conical block 106. The conical block 106 is accommodated inside the expanding pin 102.

[0017] The above scheme uses a connecting pin as the core load-bearing component, providing a mounting base for other components and transferring loads. The flared pin undergoes radial elastic deformation under stress, achieving an interference fit with the mounting hole wall. A shallow groove formed at the connection between the flared pin and the connecting pin, recessed towards the axis, precisely controls the deformation position and manner of the flared pin. A through-hole provides the mounting path and transmission thread for the connecting screw. The screwing in or out of the connecting screw drives the axial displacement of the conical block. The axial movement of the conical block within the flared pin applies radial expansion force generated by its conical surface to the inner wall of the flared pin. A hexagonal hole at the top of the conical block provides an operating interface for the tool to transmit torque.

[0018] In this embodiment, preferably, a limiting plate 108 is fixedly installed in the middle of the outer side of the connecting pin 101, and the upper half of a bidirectional screw 109 is threadedly installed at the threaded hole 104 at the bottom of the connecting pin 101.

[0019] The above solution utilizes a limiting plate fixedly installed at the center of the outer side of the connecting pin to provide a rigid stop in the axial direction, preventing the connecting pin from being over-inserted. A bidirectional screw installed at the threaded hole at the bottom of the connecting pin enables connection and fastening between the connecting pin and the lower component.

[0020] In this embodiment, preferably, the bidirectional screw 109 has a through hexagonal groove 110 in the middle, and the lower half of the bidirectional screw 109 is threaded into the assembly screw hole 111.

[0021] The above-described design, with its through-hole hexagonal groove in the middle of the bidirectional screw, allows for the use of tools above the connecting pin to tighten or loosen the screw. The lower half of the bidirectional screw is threaded into the assembly screw hole, converting rotational motion into linear traction force, thereby tightening the connecting pin and the tapered positioning block.

[0022] In this embodiment, preferably, the assembly screw hole 111 is opened in the middle of the bottom end of the conical positioning block 112, the top end of the conical positioning block 112 is provided with a limiting groove 113, and the limiting groove 113 is provided with a slot 114 in the middle.

[0023] The above scheme utilizes an assembly screw hole located in the center of the bottom of the tapered positioning block to mate with a bidirectional screw rod for threaded connection. A limiting groove located in the center of the top of the tapered positioning block provides space for the limiting plate to achieve axial positioning. A slot located in the center of the limiting groove provides guidance and space for the insertion of the lower end of the connecting pin.

[0024] In this embodiment, preferably, the slot 114 is in communication with the assembly screw hole 111, the limiting groove 113 is embedded with a limiting plate 108, and the slot 114 is fitted with a connecting pin 101 located on the lower side of the limiting plate 108.

[0025] The above scheme ensures that the bidirectional screw can smoothly pass through the tapered locating block and connect with the connecting pin by maintaining communication between the slot and the assembly screw hole. The axial movement of the connecting pin is limited by accommodating the embedded locating plate in the locating groove. The relative radial position of the connecting pin and the tapered locating block is determined by inserting the connecting pin located below the locating plate into the slot.

[0026] In this embodiment, preferably, the outer surface of the conical positioning block 112 is covered with a protective gasket 115, and the outer surface of the conical positioning block 112 is fixed with a plurality of protrusions 116 at intervals, and the protrusions 116 respectively penetrate through the protective gasket 115.

[0027] The above solution protects the surface of the positioning hole and increases friction during insertion by attaching a protective washer to the outer surface of the conical positioning block. Several protrusions fixed at intervals to the outer surface of the conical positioning block increase the anti-slip friction with the positioning hole. By having the protrusions penetrate the protective washer, the washer is both limited and fixed, allowing it to directly contact the hole wall for greater anti-rotation resistance.

[0028] In this embodiment, when using the anti-loosening positioning pin of the winding equipment, firstly, the part of the connecting pin 101 located below the limiting plate 108 is inserted into the slot 114 in the middle of the limiting groove 113 at the top of the conical positioning block 112, so that the limiting plate 108, which is fixedly installed in the middle of the outer side of the connecting pin 101, is firmly embedded in the limiting groove 113 of the conical positioning block 112. This fit is crucial. Through the contact between the limiting plate 108 and the bottom of the limiting groove 113, precise axial positioning is achieved, which effectively prevents the connecting pin 101 from being over-inserted into the conical positioning block 112 after being inserted into the slot 114, and provides an accurate assembly reference for subsequent fastening operations.

[0029] Subsequently, by inserting a hexagonal wrench into the through-hole hexagonal groove 110 in the middle of the double-ended screw 109 and tightening it; since the upper half of the double-ended screw 109 is threadedly installed in the threaded hole 104 at the bottom end of the connecting pin 101, while its lower half is threadedly installed in the assembly screw hole 111 in the middle of the bottom end of the tapered positioning block 112, the action of tightening the double-ended screw 109 will simultaneously act on the upper and lower threads, generating a strong pulling force, thereby tightly pulling and fixing the connecting pin 101 and the tapered positioning block 112 into a whole; at this time, The conical positioning block 112 can then be inserted into the positioning hole of the winding equipment fixing structure. During the insertion process, the protective washer 115 covering the outer surface of the conical positioning block 112 plays a buffering and protective role. The several protrusions 116 that are fixed at intervals on the outer surface of the conical positioning block 112 and penetrate through the protective washer 115 respectively, on the one hand, limit the protective washer 115 itself to prevent it from shifting or falling off, and on the other hand, effectively increase the insertion friction between the conical positioning block 112 and the positioning hole of the winding equipment fixing structure, further enhancing the stability of the initial fixation.

[0030] After completing the connection with the fixed structure of the equipment, the connection with the movable structure of the equipment begins. The connecting pin 101 located above the limiting plate 108 and the expanding pin 102 fixedly installed at its top are inserted together into the through hole of the movable structure of the winding equipment. At this time, another hexagonal wrench is inserted into the hexagonal hole 107 at the top of the conical block 106 and tightened. Since the end of the connecting screw 105 is threaded into the threaded hole 104 at the top of the connecting pin 101, and the top of the connecting screw 105 is fixedly installed with the conical block 106, which is housed inside the expanding pin 102, tightening the hexagonal hole 107 will cause the connecting screw 105 to screw into the threaded hole 104 of the connecting pin 101, thereby pulling the conical block 106. 6. Moving downwards, i.e., into the connecting pin 101; when the conical block 106 is driven into the outer expansion pin 102 by the connecting screw 105, its conical surface will continuously squeeze the inner wall of the outer expansion pin 102 from the inside; since the connection between the outer expansion pin 102 and the connecting pin 101 is recessed towards the axis, forming a structural weak point - shallow groove 103, under the action of the internal conical force, the outer expansion pin 102 precisely undergoes controllable and uniform radial elastic expansion at the shallow groove 103, so that its outer wall is tightly pressed against the inner wall of the through hole of the movable structure of the winding equipment, thereby achieving the ultimate goal of firmly locking the movable structure to the fixed structure and effectively preventing it from loosening in the vibration environment.

[0031] The entire working mechanism achieves a dual anti-loosening effect; through the cooperation of the conical positioning block 112, the protective washer 115, and the protrusion 116, stable anchoring and wear prevention are achieved within the fixing hole; the connecting screw 105 drives the conical block 106 to cause the outward expansion pin 102 to expand and deform, achieving an interference fit and self-locking within the moving part hole; the two are connected in series as a whole through the connecting pin 101 and the bidirectional screw 109, working together to ensure the rigidity and reliability of the connection point of the winding equipment under dynamic working conditions; in addition, this design also provides installation flexibility, if an independent conical positioning block 112 is not used... 12. For active positioning, matching limiting grooves 113, slots 114, and assembly screw holes 111 can be directly machined on the fixed structure of the winding equipment, so that the limiting plate 108 and the connecting pin 101 below the limiting plate 108 can be directly inserted into the equipment body. At this time, a hex wrench is used to enter from the opening of the outward expansion pin 102 and to turn the bidirectional screw 109 through the threaded hole 104 of the connecting pin 101, thereby realizing the direct fixation of the connecting pin 101 to the fixed structure of the equipment. Then, the connecting screw 105 is tightened to make the outward expansion pin 102 expand and fix the active structure, simplifying the overall structural hierarchy.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A locking pin for a winding device, comprising a connecting pin (101), characterized in that: An expansion pin (102) is fixedly installed at the top of the connecting pin (101). The connection between the expansion pin (102) and the connecting pin (101) is recessed towards the axis to form a shallow groove (103). A threaded hole (104) is opened in the middle of the connecting pin (101). The threaded hole (104) is through. The end of the connecting screw (105) is installed through the threaded hole (104) at the top of the connecting pin (101) by thread. A conical block (106) is fixedly installed at the top of the connecting screw (105). A hexagonal hole (107) is opened at the top of the conical block (106). The conical block (106) is accommodated inside the expansion pin (102).

2. The anti-loosening positioning pin for a winding device according to claim 1, characterized in that: A limiting plate (108) is fixedly installed on the middle of the outer side of the connecting pin (101), and the upper half of a bidirectional screw (109) is threaded through the threaded hole (104) at the bottom end of the connecting pin (101).

3. The anti-loosening positioning pin for a winding device according to claim 2, characterized in that: The bidirectional screw (109) has a through hexagonal groove (110) in the middle, and the lower half of the bidirectional screw (109) is threaded into the assembly screw hole (111).

4. The anti-loosening positioning pin for a winding device according to claim 3, characterized in that: The assembly screw hole (111) is opened at the middle of the bottom end of the conical positioning block (112), and a limiting groove (113) is opened at the middle of the top end of the conical positioning block (112), and a slot (114) is opened in the middle of the limiting groove (113).

5. The anti-loosening positioning pin for a winding device according to claim 4, characterized in that: The slot (114) is connected to the assembly screw hole (111), the limiting groove (113) is embedded with a limiting plate (108), and the slot (114) is connected with a connecting pin (101) located on the lower side of the limiting plate (108).

6. The anti-loosening positioning pin for a winding device according to claim 5, characterized in that: The outer surface of the conical positioning block (112) is covered with a protective gasket (115), and a number of protrusions (116) are fixed at intervals on the outer surface of the conical positioning block (112), and the protrusions (116) pass through the protective gasket (115) respectively.

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