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Gear alignment jig for auxiliary shaft assembly

A technology of hot-fitting and assembly, applied in the field of mechanical processing, can solve the problems of out-of-tolerance position, assembling multiple gears, cumbersome assembly process, etc., and achieve the effect of improving processing efficiency, reducing parts waste, and reducing waste rate

Active Publication Date: 2019-07-19
CHINA NAT HEAVY DUTY TRUCK GROUP DATONG GEARCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing fixture uses a positioning sleeve to fix the auxiliary shaft, and one gear is assembled at a time. Multiple gears cannot be assembled by one clamping. One needs to be heated for assembly and then the other is heated. The assembly process is cumbersome, and it takes 30 minutes to assemble one assembly , and it is prone to the phenomenon of out-of-tolerance position, resulting in high product rejection rate

Method used

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  • Gear alignment jig for auxiliary shaft assembly
  • Gear alignment jig for auxiliary shaft assembly
  • Gear alignment jig for auxiliary shaft assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0015] (1) The design of the heat-fitting jig:

[0016] 1) Clamping method: vertical clamping auxiliary shaft, the lower end clamps the outer circle processed after heat by hydraulic clamping (hydraulic station, rotary cylinder, power chuck), and the outer circle of the end face of the fixed axis step of the positioning plate (measuring reference plane), the upper end is pneumatically assisted to locate the center hole of the shaft;

[0017] 2) Alignment method: The tooth pairing mechanism is on the left side of the workbench. Now it is equipped with 4 pneumatic ball-shaped alignment columns, 1 shaft tooth, and 3 gear teeth (the number can be increased according to product requirements), and the production is replaced. The upper and lower positions of the tooth column can be adjusted individually according to the requirements of the drawing;

[0018] 3) On-site installation and fixation of the tooling: Since the height of the top of the tooling exceeds 1.7 meters, in order to...

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Abstract

The invention relates to clamp design in shaft type part machining and assembly technologies in the field of machining field, in particular to a tooth alignment clamp for countershaft assembly shrinkage fit. The tooth alignment clamp for countershaft assembly shrinkage fit solves the technical problem that after shrinkage fit of a bevel gear countershaft of an existing heavy-duty vehicle gearbox,the tooth alignment position degree requirement is difficult to meet. The tooth alignment clamp for countershaft assembly shrinkage fit comprises a tool platform. The tool platform is provided with acenter hole. A clamping device is installed at the center hole. The upper side of the tool platform is provided with an upper air cylinder through a back supporting plate. The moving end of the upperair cylinder is downward and provided with an upper center corresponding to the center of the clamping device. The center of the clamping device is provided with a lower air cylinder. The moving end of the lower air cylinder is upward and provided with a lower center corresponding to the upper center. The tool platform is further vertically provided with a locating pin supporting plate. The locating pin supporting plate is movably sleeved with multiple pneumatic locating pin assemblies. Each pneumatic locating pin assembly is provided with a tooth alignment column.

Description

technical field [0001] The invention relates to a fixture design in the processing and assembly process of shaft parts in the field of mechanical processing, in particular to a heat-fitting tooth-aligning fixture for a secondary shaft assembly. Background technique [0002] The design of the helical gear auxiliary shaft in the heavy-duty vehicle gearbox requires that the tooth-to-tooth position error of the three gears after assembly is within 0.05, and the shaft diameter and the inner hole are interference fit, which is very difficult to process. The existing fixture uses a positioning sleeve to fix the auxiliary shaft, and one gear is assembled at a time. Multiple gears cannot be assembled by one clamping. One needs to be heated for assembly and then the other is heated. The assembly process is cumbersome, and it takes 30 minutes to assemble one assembly , and it is prone to the phenomenon that the position is out of tolerance, resulting in a high product rejection rate. ...

Claims

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Application Information

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IPC IPC(8): B25B11/02B23P11/02
CPCB23P11/025B25B11/02
Inventor 杨更青师公飞刘美兰
Owner CHINA NAT HEAVY DUTY TRUCK GROUP DATONG GEARCO
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