Adjustable core-pulling fixture for oil pump shaft

Abstract

The invention discloses an adjustable core-pulling fixture for an oil pump shaft. The adjustable core-pulling fixture comprises a clamping cylinder and a positioning core bar. The clamping cylinder sequentially comprises a small-diameter cylinder section, a conical cylinder section and a large-diameter cylinder section which are arranged coaxially. The small-diameter end and the large-diameter endof the conical cylinder section are connected with the small-diameter cylinder section and the large-diameter cylinder section correspondingly in a butting mode. Through holes allowing the oil pump shaft to be inserted are formed in the middles of the conical cylinder section and the large-diameter cylinder section. A plurality of deformation receding grooves are circumferentially formed in the cylinder walls of the conical cylinder section and the large-diameter cylinder section at intervals. An inner thread is arranged on the inner wall of the small-diameter cylinder section. An outer thread matched with the inner thread is arranged on the peripheral face of the positioning core bar. The first end of the positioning core bar is connected with a main machine, and a positioning face making contact with the end face of the oil pump shaft is arranged at the second end of the positioning core bar. The adjustable core-pulling fixture adapts to the oil pump shafts with the different lengths and outer diameters, and positioning precision is improved.

Description

technical field [0001] The invention relates to the field of clamps, in particular to an adjustable clamp for oil pump shaft core pulling. Background technique [0002] The current oil pump shaft core-pulling jig is not adjustable, and can only clamp one type of oil pump shaft. When it is necessary to clamp a different type of oil pump shaft, it is necessary to pull the core to replace the jig. The operation is cumbersome and reduces work efficiency. And the current fixture is easy to cause pinching. Furthermore, the current fixture is also likely to affect the positioning accuracy due to the burrs on the outer edge of the end surface of the oil pump shaft. Contents of the invention [0003] The object of the present invention is to provide an adjustable jig for pulling the core of the oil pump shaft to solve the above-mentioned problems. [0004] The technical problem solved by the present invention can adopt following technical scheme to realize: [0005] The oil pump...

AI Technical Summary

Problems solved by technology

[0002] The current oil pump shaft core-pulling fixture is not adjustable, and can only clamp one type of oil pump shaft. When it is necessary to clamp a different type of oil pump shaft, it is necessary to pull the core to replace the fixture. The operation is cumbersome and reduces work efficiency.

Moreover, the current clamps are prone to pinching

Furthermore, the current fixture is also prone to affect the positioning accuracy due to the burrs on the outer edge of the end face of the oil pump shaft

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