a puller

Abstract

A material puller, which consists of a drive shaft (1), a one-way fork (2), a pin shaft (3), a pull trolley assembly (4), a raceway (5), a chain (6), and a drive sprocket ( 7), roller (8), bearing seat (9), bracket (10), spring (11), and stopper (12), the feature is that: the end of the pulling trolley assembly (4) is set There is a pin shaft (3), and the pin shaft (3) is connected to the one-way shift fork (2), and the pulling trolley assembly (4) is guided by the one-way shift fork (2) to run on the raceway (5), and the stopper (12 ) to limit the reverse operation, and return to the pulling state through the tension of the spring (11). In the present invention, all parts of the puller can be completely protected inside, effectively avoiding accidents, and will not be damaged due to long-term use in normal use, and can ensure stability for a long time in the working process.

Description

technical field [0001] The invention relates to a multi-purpose puller, which is suitable for the transfer and use of various lens pipe fittings and profiles. Background technique [0002] Existing material pullers usually consist of jaws, springs, a main body and connecting rods. Due to the use of spring tension, the pulling force of the spring itself is used between the two jaws to make them open and contract. This structure has certain limitations in use. The defects are as follows: 1. The spring connection itself is limited by the principle and cannot adjust the shrinkage force. In the process of use, the spring has the largest pulling force when the jaws are opened to the maximum. When the jaws shrink and the spring rebounds at the same time, the pulling force becomes smaller. The resulting problems such as uneven tension affect the accuracy; 2. Since the structure is directly connected by springs, the number of jaws is limited, and it is impossible to produce multi-ja...

AI Technical Summary

Problems solved by technology

[0002] Existing pullers are usually composed of jaws, springs, main bodies and connecting rods. Due to the use of spring tension, the spring itself is used between the two jaws to The pulling force makes it open and shrink. There are certain defects in the use of this structure, as follows: 1. The spring connection itself is limited by the principle and cannot adjust the shrinkage force. , when the jaw shrinks and the spring rebounds at the same time, the pulling force becomes smaller, and the resulting uneven pulling force and other problems affect the accuracy; 2. Since the structure is directly connected by a spring, the number of jaws is limited, and it is impossible to make multiple jaws. 3. The strength of the spring itself is not high and there is metal fatigue, which is easy to be damaged during long-term stretching work, causing inconvenience to users; 4. All parts of the structure are exposed to the outside world, and it is easy to Accidents caused during use

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