A three-point chicken heart ring opening clamp
By introducing a third support point mechanism into the open-end clamps, the problem of traditional open-end clamps easily slipping off smooth surfaces is solved, achieving stable clamping and efficient operation, and broadening the application range.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG NORMAL UNIV
- Filing Date
- 2025-04-15
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional open-end pliers are prone to slipping when clamping ring-shaped workpieces with smooth inner walls. They lack a stable support structure, are difficult to adapt to the clamping requirements of workpieces of different sizes, and are prone to damaging the workpiece surface.
A three-point heart-shaped opening pliers is designed. By adding a third support point mechanism on the inner side of the jaws, adopting a cylindrical protrusion structure and covering it with a rubber anti-slip layer, a triangular support structure is formed, which increases the contact points and contact area and improves the static friction coefficient.
It significantly improves the stability and reliability of clamping on smooth surfaces, reduces operational difficulty, broadens the application range, and ensures safety and work efficiency.
Smart Images
Figure CN224274707U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of a pliers tool, specifically a pliers tool capable of opening a heart ring. Background Technology
[0002] Traditional open-end pliers are prone to slippage when clamping ring-shaped workpieces with smooth inner walls due to insufficient contact points and friction, and lack a stable support structure, affecting operational accuracy. Furthermore, existing tools are ill-suited for clamping workpieces of different sizes, and the open-end components can easily damage the workpiece surface. Summary of the Invention
[0003] This invention aims to overcome the technical shortcomings of traditional open-end pliers, which are prone to slippage and inability to open smoothly smooth-surfaced objects (such as V-rings and other wire rope slings). Through an innovative design and the introduction of a third support point, the stability and reliability of the open-end pliers are significantly improved in specific application scenarios. Specifically, this invention aims to provide a novel open-end pliers that can firmly clamp and effectively open objects with smooth inner surfaces, such as V-rings, reducing operational difficulty, improving work efficiency, ensuring operator safety, expanding the application range of open-end pliers, and meeting a wider range of work needs.
[0004] To address the shortcomings of existing technologies, the present invention aims to achieve the above objectives. The technical solution adopted by the present invention is as follows:
[0005] A three-point grommets for opening the heart ring, comprising:
[0006] The clamp body consists of two opposing clamp arms, one end of which is fixedly connected by a hinge shaft, and the other end forms an openable and closable jaw.
[0007] An opening component, located at the end of the jaws, is used to insert into narrow gaps and perform opening operations;
[0008] The third support point mechanism is located on the inside of the jaws, forming a three-point support structure together with the two contact points of the jaws, which provides anti-slip and fixing function when clamping objects with smooth inner surfaces.
[0009] The third support point mechanism is a cylindrical protrusion structure with an anti-slip layer on its surface made of rubber.
[0010] The opening component has a trapezoidal structure and is made of hardened steel or cemented carbide.
[0011] The outer side of the opening component is provided with anti-slip texture, the texture of which is wavy and the depth is 0.3mm.
[0012] The clamp arm has a protective sleeve made of rubber to enhance its anti-slip properties.
[0013] The two contact points of the third support point mechanism and the jaws are arranged in a triangle, with the included angle ranging from 60° to 120°.
[0014] The two jaws of the open jaw pliers are supported by a spring, which allows the jaws to close automatically.
[0015] Based on the traditional double-arm jaws, a third support point mechanism is added, whose cylindrical protrusion forms a triangular mechanical distribution with the original two contact points of the jaws. This structure increases the number of contact points by 50% and the contact area by 40%, forming a stable torque on the inner wall of the heart-shaped ring, completely solving the problem of slippage when clamping on smooth surfaces.
[0016] Based on the above technical solution, the advantages of the present invention compared with the prior art are as follows:
[0017] By using a third support point (cylindrical protrusion + rubber anti-slip layer) to form a triangular support structure with the original jaws, the contact area is increased by 40%, and the static friction coefficient is improved to 0.8-1.2 (compared to 0.2-0.5 for traditional tools), completely solving the problem of slippage when clamping objects on smooth surfaces. Actual test data shows that it can still maintain 98% clamping stability even in oily environments. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the appearance of the utility model;
[0019] Figure 2 This is a schematic diagram of the utility model structure;
[0020] Figure 3 This is a schematic diagram of a chicken heart ring.
[0021] Figure 4 This is a schematic diagram showing the position of the chicken heart ring during the operation of this utility model;
[0022] In the diagram: 1. Pliers body; 11. Pliers arm; 12. Hinge shaft; 13. Pliers jaws; 2. Opening component; 3. Support mechanism; 4. Protective sleeve; 5. Spring; Detailed Implementation
[0023] Example: The jaw width is 15mm, the diameter of the cylindrical protrusion of the third support point mechanism (3) is 3mm, and the thickness of the rubber anti-slip layer is 1mm; the trapezoidal slope angle of the opening component (2) is 30°, and the depth of the anti-slip texture is 0.3mm. During operation, after inserting the opening component into the gap, force is applied to open the jaws, and the three-point support structure automatically adheres to the inner wall of the component to achieve stable clamping.
[0024] Align the tip of the opening component (2) with the closed gap of the heart ring (width ≥ 0.2 mm), apply vertical pressure until fully inserted (insertion depth ≥ 5 mm); when gripping the clamp arm (11), the rubber layer of the third support point (3) is compressed by 0.5 mm, forming a surface contact with the inner wall of the heart ring (contact area ≥ 8 mm²), and the three-point structure generates a clamping friction force of 15 N; slowly apply force to the outside to open the jaws (13), and transmit the torque through the trapezoidal inclined plane (lever ratio 3:1), so that the gap expands to 6 mm; after releasing the gripping force, the spring (5) drives the jaws to close within 0.5 seconds to avoid misoperation.
Claims
1. A three-point chicken heart ring opening forceps, characterized in that, include: The clamp body (1) consists of two clamp arms (11) arranged opposite to each other. One end of the clamp arm (11) is fixedly connected by a hinge shaft (12), and the other end forms an openable jaw (13). An opening component (2) is provided at the end of the jaws (13) for inserting into narrow gaps and performing opening operations; The third support point mechanism (3) is located inside the jaws (13) and together with the two contact points of the jaws (13) form a three-point support structure, which provides anti-slip and fixing function when clamping objects with smooth inner surfaces.
2. The three-point daisy-wheel opening pliers according to claim 1, characterized in that: The third support point mechanism (3) is a cylindrical protrusion structure with an anti-slip layer on its surface, made of rubber.
3. The three-point slit wrench according to claim 1, characterized in that: The opening component (2) has a trapezoidal structure and is made of hardened steel or cemented carbide.
4. The three-point slit wrench according to claim 1, characterized in that: The outer side of the opening component (2) is provided with anti-slip texture, the texture of which is wavy and the depth is 0.3mm.
5. The three-point grommets for opening the grommets according to claim 1, characterized in that: The clamp arm has a protective sleeve (4) made of rubber, which enhances its anti-slip properties.
6. The three-point grommets for opening the grommets according to claim 1, characterized in that: The two contact points of the third support point mechanism (3) and the jaw (13) are arranged in a triangle with an included angle ranging from 60° to 120°.
7. The three-point slit wrench according to claim 1, characterized in that: The two jaws of the open jaw pliers are supported by a spring (5), which allows the jaws to close automatically.