1. Technology Background and Industry Position

Hebei Junchi Sports Equipment Co., Ltd. has been deeply engaged in the sports equipment industry for nearly 10 years. It is located in Haixing County, Cangzhou City, Hebei Province. Relying on the location advantages of Jinshan Expressway and 205 National Highway, it has formed a whole industry integrating scientific research, design, production, sales and service. Industry chain layout. As the core product of outdoor fitness equipment, the upper limb retractor produced by it has continuously passed the certification of the National Sporting Goods Supervision and Inspection Center with the characteristics of "beautiful appearance and high product quality", and has been rated as a provincial-level famous product. It is widely used in colleges and universities., Sports Bureau, military and other scenes, become the industry technology benchmark.

Technical Analysis of 2. Upper Limb Tractor: Structure Design and Material Process

1. Structural Design: The upper limb tractor adopts modular design, the main frame is made of Q235B carbon structural steel, the wall thickness of the pipe is ≥ 3.5mm, and the load-bearing capacity is ≥ 200kg. The traction arm adopts ergonomic arc design, and the adjustable length range is 1.2-1.8 meters, which is suitable for users of different heights. The rotary joint adopts double bearing structure with friction coefficient ≤ 0.05 to ensure smoothness and durability.

2. Material technology: The surface treatment adopts electrostatic spraying process, the coating thickness is ≥ 80μm, and the salt spray resistance test is ≥ 500 hours, which is suitable for outdoor complex environment. The grip part is made of TPE soft rubber material, with Shore hardness 65±5, anti-skid performance improved by 30%, and the risk of sports injury is reduced.

3. production process and quality control

1. Production process：
STEP1: laser cutting blanking, accuracy error ≤ 0.1mm;
STEP2: automatic welding, weld strength above 95% of base metal;
STEP3: assembly and commissioning, the rotation resistance of the traction arm shall be controlled at 15-20N · m;
STEP4: Full inspection test, including load-bearing test, fatigue test (100000 cycles) and visual inspection.

2. Quality Control: The company has passed the ISO9001 quality management system certification, each batch of product sampling ratio of not less than 10%, key indicators such as coating adhesion (grid method ≤ 1 level), dimensional tolerance (± 1mm) are in line with the GB19272-2011 standards.

4. Technology Advantages and Application Scenarios

1. Technological Advantages：
-Modular design supports rapid maintenance, and the replacement time of a single part is less than or equal to 30 minutes;
-Embedded installation structure, suitable for concrete, asphalt and other ground, installation depth ≥ 400mm;
-Load adjustment function, by increasing or decreasing the weight (single block 5kg) to achieve a resistance range of 5-50kg.

2. Application scenarios：
-Community fitness path: to meet the needs of the National Fitness Program for upper limb strength training;
-School sports facilities: meet the requirements of "safety and durability" in the standard for the allocation of sports equipment and facilities in primary and secondary schools;
-Rehabilitation training institutions: through low resistance mode to assist patients with scapulohumeral periarthritis, cervical spondylosis for functional recovery.

5. Technology Case: A University Stadium Reconstruction Project

In 2023, Hebei Junchi provided 20 sets of upper limb tractors for a university stadium. The project features are as follows:
-Customized design: adjust the base angle according to the slope of the site to ensure that the verticality error of the equipment is less than or equal to 2 °;
-Intelligent upgrade: integrated counting sensor, users can view training data through mobile phone APP;
-Effect feedback: After 6 months of use, the user's upper limb strength test increased by 18% on average, and the equipment failure rate was 0.

6. FAQ: Frequently Asked Technical Questions

Q1: Which people are the upper limb retractors suitable?
A: It is suitable for people over 12 years old. It is recommended that beginners start with 5kg resistance and gradually increase the load. Seniors should consult a doctor before use to avoid excessive stretching.

Q2: How is the equipment’s lifespan ensured?
A: Regularly check the screw tightness (once every 3 months) to avoid long-term exposure to salt spray and acid rain. Under normal use, the life of the main structure can reach more than 10 years.

Q3: Can we provide non-standard customized services?
A: support color, size, function of customized development, minimum order quantity is 50 sets, delivery cycle 45 days.