Hinge pin structure with convenient pin pulling
Patent Information
- Application Number
- CN202522718567.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-22
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-12-22
AI Technical Summary
但是，现有的大部分铰接销轴多采用等直径结构，与铰接孔为全程小间隙配合，拔销时需克服全程的摩擦阻力，存在操作费力、易损伤销轴或铰接孔的问题
[0014]1、铰接座的外表面左右两侧均开设有铰接销轴孔，铰接销轴孔的内表面穿设有分段式铰接销轴，分段式铰接销轴的外表面左右两侧均平角设有销轴工作区，分段式铰接销轴的外表面中间处偏左右两侧呈斜角设有销轴过渡区，分段式铰接销轴的外表面中间处平角设有销轴连接区，分段式铰接销轴穿入铰接座的铰接销轴孔，销轴工作区与铰接销轴孔小间隙配合，保证连接刚度，弹性定位组件隐藏于铰接座内并卡紧销轴的连接区，实现销轴的锁定，铰接座的底端中间处于分段式铰接销轴的外表面铰接下部铰接臂，下部铰接臂通过销轴与铰接座铰接，下部铰接臂的外表面下侧环形设有铰接臂滑轮组件，铰接臂滑轮组件为铰接臂的功能部件；铰接座的顶部槽位内匹配有顶出垫块，将顶出垫块推入铰接座顶部的预留槽位，使垫块与分段式铰接销轴的顶部接触，为拔销提供轴向施力点，替代了传统敲击或拉拽的粗暴拔销方式，操作更高效、安全；然后，前期，销轴工作区通过铰接销轴孔时，推动顶出垫块，使销轴的工作区穿过铰接销轴孔，小间隙配合，拔销阻力略大，中期，销轴过渡区通过铰接销轴孔时，呈锥度的销轴过渡区通过铰接销轴孔，配合间隙逐渐增大，拔销阻力递减，后期，销轴连接区通过铰接销轴孔时，销轴连接区通过铰接销轴孔，大间隙配合，拔销阻力大幅降低，最终将销轴完全拔出，实现铰接座与下部铰接臂的分离；通过销轴工作区小间隙、过渡区渐变大间隙和连接区大间隙的分段设计，将拔销阻力先小后大的传统结构，优化为先略大后递减的阻力曲线，搭配顶出垫块进一步降低操作力；装配状态下，销轴工作区与铰接孔小间隙配合，结合弹性定位组件，保证铰接处的连接刚度与稳定性。
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Figure CN224800698U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of mechanical hinge components, specifically a hinge pin structure that facilitates pin removal. Background Technology
[0002] A pin is an important component in mechanical engineering, typically used to connect or fix two parts, enabling them to rotate relative to each other or achieve a specific movement. The structure of a pin is generally simple, usually a long rod with holes or other shapes at both ends for easy installation and fixation. Pins can function as fasteners, connecting two or more parts, and are commonly found in mechanical assemblies. In some mechanical devices, pins can be used as guides, ensuring that moving parts follow a predetermined path. Because pins typically bear large loads, their materials and design must meet requirements for strength and durability.
[0003] Commonly used materials include steel, stainless steel, and aluminum alloys. Choosing the right material can improve the strength and corrosion resistance of the pin. The appropriate diameter and length should be selected based on the specific application requirements. Depending on the working environment, surface treatment can be applied to improve wear resistance and corrosion resistance.
[0004] Pins are widely used in various fields such as machinery, automobiles, and aerospace. However, most existing hinged pins use a constant diameter structure and have a small clearance fit with the hinge hole throughout the entire movement. Pulling out the pin requires overcoming frictional resistance throughout the movement, resulting in laborious operation and potential damage to the pin or hinge hole. Therefore, those skilled in the art have provided a hinged pin structure that facilitates pin removal, thereby solving the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to provide a hinged pin structure that facilitates pin removal, thereby solving the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A hinged pin structure for easy pin removal includes a hinge base, a segmented hinged pin, an elastic positioning component, a lower hinge arm, and a hinge arm pulley assembly. The hinge base has hinged pin holes on both the left and right sides of its outer surface. A segmented hinged pin passes through the inner surface of the hinged pin holes. The segmented hinged pin has a working area at a flat angle on both the left and right sides of its outer surface. A transition area at an oblique angle is provided at the center of the outer surface of the segmented hinged pin on both the left and right sides. A connecting area at a flat angle is provided at the center of the outer surface of the segmented hinged pin. The angle of the transition area is smaller than the friction angle of the metal surface of the segmented hinged pin. The working area of the pin and the hinged pin hole have a small clearance fit, with a clearance of 0.02-0.05 mm.
[0008] As a further embodiment of this utility model: the top groove of the hinge seat is fitted with an ejector pad, which can axially push the segmented hinge pin.
[0009] As a further improvement of this utility model: the left and right sides of the outer surface of the hinge seat are embedded with elastic positioning components for locking and fixing, and the elastic positioning components lock the assembly position of the segmented hinge pin.
[0010] As a further embodiment of this utility model: the lower hinge arm is hinged to the outer surface of the segmented hinge pin at the middle of the bottom end of the hinge seat, and there are two lower hinge arms.
[0011] As a further embodiment of this utility model: the lower outer surface of the lower hinge arm is provided with a hinge arm pulley assembly in a ring shape, and the number of hinge arm pulley assemblies is two.
[0012] As a further improvement of this utility model: the outer surface of the segmented hinge pin is uniformly coated with a zinc-plated coating, which is used for rust prevention and wear resistance, and the coating thickness is 0.008-0.015mm.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. The outer surface of the hinge seat has hinge pin holes on both the left and right sides. A segmented hinge pin passes through the inner surface of the hinge pin holes. The outer surface of the segmented hinge pin has a working area at a flat angle on both the left and right sides. A transition area at an angle to the left and right sides is located at the center of the outer surface of the segmented hinge pin. A connecting area is located at a flat angle at the center of the outer surface of the segmented hinge pin. The segmented hinge pin passes into the hinge pin holes of the hinge seat. The working area of the pin and the hinge pin hole have a small clearance fit to ensure connection rigidity and elasticity. The positioning component is hidden within the hinge seat and engages with the connecting area of the pin, thus locking the pin. The lower hinge arm is hinged to the outer surface of the segmented hinge pin at the bottom center of the hinge seat. The lower hinge arm is hinged to the hinge seat via the pin. A hinge arm pulley assembly is annularly located on the lower side of the outer surface of the lower hinge arm; this pulley assembly is a functional component of the hinge arm. An ejector pad is fitted into a groove at the top of the hinge seat. Pushing the ejector pad into a pre-drilled groove at the top of the hinge seat brings it into contact with the top of the segmented hinge pin. This provides an axial force point for removing the pin, replacing the traditional rough method of hammering or pulling, making the operation more efficient and safer. Initially, when the working area of the pin passes through the hinged pin hole, the ejector block is pushed to allow the working area of the pin to pass through the hinged pin hole, resulting in a small clearance fit and slightly higher resistance to pin removal. In the middle stage, when the transition area of the pin passes through the hinged pin hole, the tapered transition area gradually increases the clearance, reducing the resistance to pin removal. Finally, when the connecting area of the pin passes through the hinged pin hole, the pin connecting area... The hinge pin hole features a large clearance fit, significantly reducing the resistance to pin removal and ultimately allowing the pin to be completely pulled out, thus separating the hinge seat from the lower hinge arm. Through a segmented design with a small clearance in the pin working area, a gradually increasing clearance in the transition area, and a large clearance in the connecting area, the traditional structure of pin removal resistance increasing gradually is optimized into a resistance curve that is slightly larger initially and then gradually decreases. This, combined with an ejector pad, further reduces the operating force. In the assembled state, the small clearance fit between the pin working area and the hinge hole, combined with the elastic positioning components, ensures the connection rigidity and stability at the hinge.
[0015] 2. The outer surface of the segmented hinge pin is uniformly coated with a zinc-plated coating. This zinc-plated coating, with a thickness of 0.008-0.015mm, serves as a rust and wear-resistant layer. It forms a dense zinc oxide film on the surface of the segmented hinge pin, isolating it from air and moisture, significantly reducing the risk of corrosion in humid and dusty conditions. This makes it suitable for outdoor or industrial environments with hinged structures. Furthermore, the zinc plating itself has a hardness of approximately HV100-200, reducing friction and wear when the pin mates with the hinge hole, extending the pin's lifespan, and reducing resistance fluctuations during pin removal or assembly. The zinc-plated coating enhances rust and wear resistance, extending the lifespan of both the pin and the hinge hole. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of a hinged pin structure that facilitates pin removal.
[0017] Figure 2 This is a schematic diagram of a hinged pin structure with the pin not removed, which facilitates pin removal.
[0018] Figure 3 This is a schematic diagram of a hinged pin structure for easy pin removal during the pin removal process.
[0019] Figure 4 This is a planar schematic diagram of a hinged pin structure for easy pin removal.
[0020] Figure 5 This is a planar schematic diagram of the coating on the surface of a hinged pin structure that facilitates pin removal.
[0021] In the figure: 1-Hinge seat, 2-Hinge pin hole, 3-Segmented hinge pin, 4-Pin working area, 5-Pin transition area, 6-Pin connection area, 7-Ejection pad, 8-Elastic positioning component, 9-Lower hinge arm, 10-Hinge arm pulley assembly, 11-Zinc coating on pin surface. Detailed Implementation
[0022] Please see Figures 1-5In this embodiment of the utility model, a hinged pin structure for easy pin removal includes a hinge seat 1, a hinged pin hole 2, a segmented hinged pin 3, a pin working area 4, a pin transition area 5, a pin connection area 6, an ejector pad 7, an elastic positioning component 8, a lower hinge arm 9, a hinge arm pulley assembly 10, and a galvanized coating 11 on the pin surface. The hinge seat 1 has hinged pin holes 2 on both the left and right sides of its outer surface. A segmented hinged pin 3 passes through the inner surface of the hinged pin hole 2. The segmented hinged pin 3 has a pin working area 4 at a flat angle on both the left and right sides of its outer surface. A pin transition area 5 is obliquely angled to the left and right sides at the middle of the outer surface of the segmented hinged pin 3. A pin connection area 6 is at a flat angle at the middle of the outer surface of the segmented hinged pin 3, and the angle of the pin transition area 5 is smaller than the friction angle of the metal surface of the segmented hinged pin 3. The pin working area 4... The hinge pin hole 2 has a small clearance fit with the hinge base 1, with a clearance of 0.02-0.05mm. The top groove of the hinge base 1 is fitted with an ejector pad 7, which can axially push the segmented hinge pin. The left and right sides of the outer surface of the hinge base 1 are embedded with elastic positioning components 8 for locking and fixing. The elastic positioning components 8 lock the assembly position of the segmented hinge pin 3. The bottom middle of the hinge base 1 is hinged to the lower hinge arm 9 on the outer surface of the segmented hinge pin 3, and there are two lower hinge arms 9. The lower side of the outer surface of the lower hinge arm 9 is provided with a hinge arm pulley assembly 10, and there are two hinge arm pulley assemblies 10. The outer surface of the segmented hinge pin 3 is uniformly coated with a zinc-plated coating 11, which is used for rust prevention and wear resistance, and the coating thickness is 0.008-0.015mm.
[0023] The working principle of this utility model is as follows: In use, firstly, hinge pin holes 2 are provided on both the left and right sides of the outer surface of the hinge seat 1. A segmented hinge pin 3 passes through the inner surface of the hinge pin hole 2. A pin working area 4 is provided at a flat angle on both the left and right sides of the outer surface of the segmented hinge pin 3. A pin transition area 5 is provided at an oblique angle on both sides of the middle of the outer surface of the segmented hinge pin 3. A pin connection area 6 is provided at a flat angle in the middle of the outer surface of the segmented hinge pin 3. The segmented hinge pin 3 passes through the hinge pin hole 2 of the hinge seat 1. The pin working area 4 and the hinge pin hole 2 have a small clearance fit to ensure connection rigidity. The elastic positioning component 8 is concealed. The connecting area 6, concealed within the hinge seat 1 and clamping the pin 3, locks the pin. The lower hinge arm 9 is hinged to the outer surface of the segmented hinge pin 3 at the bottom center of the hinge seat 1. The lower hinge arm 9 is hinged to the hinge seat 1 via the pin 3. A hinge arm pulley assembly 10 is annularly located on the lower side of the outer surface of the lower hinge arm 9; the hinge arm pulley assembly 10 is a functional component of the hinge arm. A push-out pad 7 is fitted into the top slot of the hinge seat 1. Pushing the push-out pad 7 into the pre-reserved slot at the top of the hinge seat 1 brings the pad 7 into contact with the top of the segmented hinge pin 3, providing an axial force point for removing the pin. This replaces the traditional method of forcefully removing the pin by striking or pulling, resulting in more efficient operation. First, safety; then, in the initial stage, when the working area of the pin passes through the hinge pin hole 2, the ejector block 7 is pushed, so that the working area 4 of the pin 3 passes through the hinge pin hole 2. With a small clearance fit, the resistance to pulling the pin is slightly high. In the middle stage, when the transition area 5 of the pin passes through the hinge pin hole 2, the tapered transition area 5 passes through the hinge pin hole 2, and the fit clearance gradually increases, reducing the resistance to pulling the pin. In the later stage, when the pin connection area 6 passes through the hinge pin hole 2, the pin connection area 6 passes through the hinge pin hole 2, with a large clearance fit, significantly reducing the resistance to pulling the pin. Finally, the pin 3 is completely pulled out, achieving the separation of the hinge seat 1 from the lower hinge arm 9. Finally, the outer surface of the segmented hinge pin 3 is evenly coated with a coating. The pin surface is covered with a zinc-plated coating 11, which is used for rust prevention and wear resistance. The coating thickness is 0.008-0.015mm. The zinc-plated coating 11 forms a dense zinc oxide film on the surface of the segmented hinge pin 3, which can isolate air and moisture from contact with the pin substrate, greatly reducing the risk of corrosion of the steel segmented hinge pin 3 in humid and dusty conditions. It is suitable for outdoor or industrial environments with hinged structures. Moreover, the zinc coating itself has a hardness of about HV100-200, which can reduce friction and wear when the pin is mated with the hinge hole, extend the service life of the pin, and reduce resistance fluctuations during pin pulling or assembly.
[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A hinged pin structure for easy pin removal, comprising a hinge base (1), a segmented hinged pin (3), an elastic positioning assembly (8), a lower hinged arm (9), and a hinged arm pulley assembly (10), characterized in that, The hinge seat (1) has hinge pin holes (2) on both the left and right sides of its outer surface. A segmented hinge pin (3) passes through the inner surface of the hinge pin hole (2). The segmented hinge pin (3) has a pin working area (4) at a flat angle on both the left and right sides of its outer surface. The segmented hinge pin (3) has a pin transition area (5) at an oblique angle on both the left and right sides at the middle of its outer surface. The segmented hinge pin (3) has a pin connection area (6) at a flat angle at the middle of its outer surface. The angle of the pin transition area (5) is smaller than the friction angle of the metal surface of the segmented hinge pin (3). The pin working area (4) and the hinge pin hole (2) are fitted with a small clearance, with a clearance of 0.02-0.05mm.
2. The hinged pin structure for easy pin removal according to claim 1, characterized in that, The top slot of the hinge seat (1) is fitted with an ejector pad (7), which can axially push the segmented hinge pin.
3. The hinged pin structure for easy pin removal according to claim 1, characterized in that, The hinge seat (1) has an elastic positioning component (8) embedded in both the left and right sides of its outer surface. The elastic positioning component (8) locks the assembly position of the segmented hinge pin (3).
4. The hinged pin structure for easy pin removal according to claim 1, characterized in that, The lower hinge arm (9) is hinged to the middle of the bottom end of the hinge seat (1) on the outer surface of the segmented hinge pin (3), and there are two lower hinge arms (9).
5. The hinged pin structure for easy pin removal according to claim 4, characterized in that, The lower hinge arm (9) has a hinge arm pulley assembly (10) arranged in a ring on the lower side of its outer surface, and there are two hinge arm pulley assemblies (10).
6. The hinged pin structure for easy pin removal according to claim 1, characterized in that, The outer surface of the segmented hinge pin (3) is uniformly coated with a zinc-plated coating (11). The zinc-plated coating (11) is used for rust prevention and wear resistance, and the coating thickness is 0.008-0.015mm.