Crankshaft timing gear installation positioning mechanism
A timing gear, installation and positioning technology, applied in the direction of workpiece clamping device, metal processing, metal processing equipment, etc., can solve the problem that the crankshaft assembly surface is not large, it is difficult to process positioning pin holes, etc., to achieve simple structure and convenient processing Effect
Active Publication Date: 2016-02-24
GUANGXI YUCHAI MASCH CO LTD
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- Application Information
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Problems solved by technology
However, there is not much space on the assembly surface of the crankshaft, so it is not easy to process a positioning pin hole
Method used
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[0017] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.
[0018] Such as Figure 1 to Figure 4 As shown, the timing gear 1 involved in the present invention is installed on the rear end surface of the crankshaft, and a positioning keyway 11 is opened on the installation end surface of the timing gear and the crankshaft. The width of the positioning keyway 11 is designed to be 3-5mm, and the depth of the keyway is 3-5mm.
[0019] further as Figure 4-6 As shown, the present invention cancels the positioning mode in which the locating pin and the locating pin hole cooperate in the prior art, and replaces it with the positioning tool 2 and the timing gear positioning keyway 11 for positioning. The positioning tool 2 of the present invention comprises a front-end positioning cl...
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Abstract
The invention discloses a crankshaft timing gear installing and positioning mechanism. The crankshaft timing gear installing and positioning mechanism comprises a timing gear positioning key groove and a positioning tool. The timing gear positioning key groove is formed in the installing end face of a timing gear. The positioning tool is provided with a front end positioning claw, a middle positioning claw, a back end positioning claw and a positioning rod. The positioning rod is arranged at the position coinciding with the phase position of a crankshaft crank pin top dead center of a cylinder at the rearmost end of an engine, the front end positioning claw and the back end positioning claw are in contact with corresponding crankshaft main journals, and the middle positioning claw is in contact with a crankshaft crank pin. The timing gear is assembled at the back end of a crankshaft, and the positioning key groove and the positioning rod on the positioning tool are installed in an alignment mode. The positioning tool is matched with the positioning groove in the timing gear in an alignment mode, and therefore timing positioning can be guaranteed, and the crankshaft timing gear installing and positioning mechanism is simple in structure and convenient to machine.
Description
technical field [0001] The invention relates to the field of engines, in particular to a diesel engine crankshaft timing gear installation and positioning mechanism. Background technique [0002] The function of the timing gear of the engine crankshaft is not only to transmit torque, but also to meet the timing of oil supply and gas distribution. Therefore, the installation phase of the marking teeth must be guaranteed during assembly. When the timing gear is assembled at the rear (that is, installed on the rear end face of the crankshaft), the timing gear is generally positioned through the pin hole on its end face and the pin assembled on the rear end face of the crankshaft, or through auxiliary tooling equipment. [0003] When using the mechanism of pin holes and dowel pins for positioning, it is required that the crankshaft and the mounting surface of the timing gear have enough space to process the dowel pins and dowel pin holes. And the space on the crankshaft assembl...
Claims
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IPC IPC(8): B25B11/00B23P11/02
CPCB23P11/025B25B11/00
Inventor 吴可吴恢栋曹杨军袁家林
Owner GUANGXI YUCHAI MASCH CO LTD