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Creator JGS588 Electrical Jigsaw, Transmission Principle Renovation
Applications of Internal Grooved Cam in Jigsaw
High Quality Cost/effective Product Made in China
It is a tool for precise sawing at accurate angles or for robust use, professional jigsaw for diversified applications.
With sharp jig saw blades, the electric jig saw cuts through wood, metal, plastic, rubber, leather, chemical fiber fabrics, foam plastics, paperboardand make various types of cuts (straight and curved). It provides powerful and efficient work. It is applied widely in trade such as automobiles, ships, furniture, leather fields, and used in wood mould, arts & crafts, scenery setting, advertising, maintenance and repairing as well.
Since the creation of the first jigsaw in the world, the most original eccentric wheel system (crank slider) has been adopted as its reciprocating rectilinear movement output mechanism. See Figure 1.
Figure 1
In our jigsaw, we adopt Internal Grooved Cam reciprocating mechanism, making the most use of modern environment and conditions such as the up-to-date design-aided means, processing means, modeling craft and high-tech original materials. It avoids from all defects of traditional eccentric wheel system (crank slider) system. The revolution in its designs principle promotes this ideal cost-effective unique product in the world. See Figure 2.
Figure 2
Movement Principle Comparison and Analysis
Crank slider type | Internal grooved cam type | ||
Processing features/advantages and disadvantages | 1. With the high accuracy powder metallurgy and a great deal of machine processing as the principle, with high price. 2. Transmission parts are installed on the projecting shaft, easily gets loose or failure, the projecting shaft has complicated processing and high cost, big discreteness. (See Figure 3) | 1. It takes plastic injection process as the principle, the cost is reduced significantly in comparison to the traditional structure. 2. Without the projecting shaft, the transmission structure is compact and simple, the product is with good consistency. | |
Movement features/advantage and disadvantage | Several movement surfaces leads to loose transmission structure, and high breakdown rate | With compact and reliable transmission structure | |
Temperature rise | Big convolution surface gliding and rubbing/wearing away heating and with bumping swing, so though it installs expensive accessories such as needle bearing, the temperature rise still is not be controlled easily, the best product in this range is with 25~26°C | Without big convolution surface, or the interference factor such as centrifugal force, the temperature rise is no more than 26°C |
Figure 3
II. Product Features Comparison and Analysis
Crank slider type | Internal grooved cam type | ||
Vibration | It has the interference of centrifugal force from eccentric mechanism, it is difficult to control the counterweight moment of inertia, so the vibration control is not ideal | It is just weight control of output parts and counterweight, and because the distance between them is small, so the vibration control is effective without difficulty. | |
Noise | 83dB(3100 times/S) | 80dB(3100 times/S) | |
Performance | Excellent cutting feature | Excellent cutting feature | |
Reliability | The projecting shaft easily gets loose, so the jigsaw easily gets failure | There is no projecting shaft, the jigsaw usually not gets failure |
Specifications:
Input power: 400W
Input voltage: 220V
Noise: 80~83 dB
Cutting capability: 60mm (Wood), 6mm (cold-roll steel sheets)
Stroke length: 25mm
Frequency: 2,500 times/minute