CN202209924U

CN202209924U - Oil hole measuring tool for engine connecting rod big end

Info

Publication number: CN202209924U
Application number: CN2011202826056U
Authority: CN
Inventors: 韩海萍; 周洋; 陈帮珍; 向桥
Original assignee: YUNNAN XIYI INDUSTRY CO LTD
Current assignee: YUNNAN XIYI INDUSTRY CO LTD
Priority date: 2011-08-05
Filing date: 2011-08-05
Publication date: 2012-05-02
Anticipated expiration: 2021-08-05

Abstract

The utility model discloses an oil hole measuring tool for an engine connecting rod big end, which is mainly used for measuring an oil hole position of the engine connecting rod big end and is suitable for the measurement of other similar part hole positions. The utility model adopts a main technical scheme that: a positioning central spindle is arranged on the left side of a base, and a positioning bracket is fixed on the right side of the base; a tightening screw is arranged on one side of the positioning bracket; a measured body is fixed at a position on the positioning bracket at the same angle as a connecting rod oil hole; and a measuring central spindle is inserted into a measured body hole. Through the trial, the oil hole measuring tool proves that the phenomena of no detection tools for the oil hole positions of the connecting rod big end, and frequent unqualified oil hole positions on the conventional production line are prevented. The oil hole measuring tool is directly used for measuring the oil hole positions on the production line and monitoring the quality in real time, ensures that all workpieces are qualified, and meets the requirement of current production of connecting rods.

Description

A kind of engine link major part oilhole survey instrument

One, technical field

The utility model belongs to a kind of testing tool of mechanical form and position tolerance, is mainly used in the measurement of engine link major part oil-hole location, also is applicable to the measurement of other like parts hole site.

Two, background technology

Connecting rod is one of vitals of engine, in many bar linkage structures, is provided with to be bent axle and the lubricated oil hole of thin-wall bearing shell, only refers to that here the big end oilhole sees Fig. 1, and this oilhole needs controlling dimension α ₁, φ ₁And L ₁, φ ₂And L ₂, α ₂And L ₃, the skew of big end oil-hole location can cause bent axle and bearing shell unlubricated and burn and lose, and more serious is easily from the fracture of oilhole Working position, causes the engine detonation.Therefore the measurement of the position after the processing of big end oilhole, the depth and band angle just seems very important.But the big end oil-hole location is the intersection point compositeness position, space of band angle, and key element is more, and it is big to measure difficulty.

According to investigations, the measurement of big end oil-hole location at present both at home and abroad, most of producers all carry out on three coordinatographs, are that the degree that the physical location of the point, line, surface key element through the control measured piece departs from ideal position is judged its site error.But this three coordinatographs need import, and price is very expensive, and volume is big, and inconvenience is moved, and require work under constant temperature, super-clean environment.So can only regularly take out the connecting rod of batch machining and to pick up several the measurement; Can not often measure at any time, more can not on production line, follow the tracks of detection, the underproof phenomenon of major part oil-hole location therefore usually can occur; Directly have influence on the performance quality of engine, this technical barrier is anxious to be solved.

Three, utility model content

Technical problem underlying and purpose that the utility model will solve are: measure the defective that exists according to present big end oil-hole location; Design a kind of simply, survey instrument fast and accurately; Be used on the production line measurement to the big end oil-hole location; Quality is monitored in real time, guaranteed that the big end oilhole is all qualified, satisfy the needs that connecting rod is produced.

The main technical schemes of the utility model is: positioning core axle of fixing assembling on the left side of base; Locating supports are fixed with three screws and two pins in the right at base, in a side of locating support fastening bolt are installed; On locating support,,, stud with guide pin bushing in the hole of measuring body through screw, pin fixation measuring body with the identical position of big end oilhole angle; In guide pin bushing, insert and measure mandrel.

The utility model proves through practical application: after using this instrument; Can carry out the identification of " qualified " and " defective " to position, the depth of multiple big end oilhole; Thereby have quality monitoring and instruct the double action of producing, can stop the oilhole generation of off-gage phenomenon in batch; Simple to operate, quick, accurate, measuring accuracy is ± 0.1mm in, can satisfy the needs of the existing production of various connecting rods.

Four, description of drawings

Below in conjunction with accompanying drawing, the utility model is done to describe in further detail.

Fig. 1 is a big end oil-hole location size synoptic diagram.

Fig. 2 is the structural front view of the utility model.

Fig. 3 is the vertical view of Fig. 2.

Fig. 4 is after removing piece number 6, the right view of Fig. 2.

Fig. 5 is φ ₁And L ₁Measure the sketch of mandrel.

Fig. 6 is φ ₂And L ₂Measure the sketch of mandrel.

Fig. 7 is α ₂And L ₃Measure the sketch of mandrel.

Five, embodiment

With reference to Fig. 1,2,3,4, the main technical schemes of the utility model is described: the utility model by base 1, positioning core axle 2, screw 4, locating support 5, measure mandrel 6, pin 7, fastening bolt 8, pin 9, measuring body 10, guide pin bushing 11, screw 12 etc. and form.Its concrete structure is positioning core axle 2 of fixing assembling on the left side of base 1; Locating supports 5 are fixed with three screws 4 and two pins 7 in the right at base 1, in a side of locating support fastening bolt 8 are installed; On locating support 5 with connecting rod 3 major part oilhole α ₁The position that angle is identical through screw 12, pin 9 fixation measuring bodies 10 (see figure 1)s, studs with guide pin bushing 11 in the hole of measuring body; In guide pin bushing, insert and measure mandrel 6.

With reference to Fig. 3,5,6,7, packing combination after the utility model structure adopts each part manufacturing to accomplish will guarantee in each part manufacturing that precision is less than 0.003mm; The position angle and the big end oilhole α of measuring body 10 when assembling ₁The hole height of angle, measuring body 10 and crank pin end pore height etc. are consistent, and build-up tolerance is got 1/3rd of workpiece tolerance; The endoporus of guide pin bushing 11 matches with measurement mandrel 6, adopts clearance fit, and its gap is 0.003～0.005mm, and guide pin bushing 11 material selection tool steel, hardness are 58～63HRC, guarantee when measuring, to be not easy to be worn, not lose efficacy; Press the big end oilhole and measure the key element difference, be designed to three groups respectively, φ measuring mandrel 6 ₁And L ₁One group, φ ₂And L ₂One group, chamfering α ₂And L ₃One group; Length dimension L ₁, L ₂, L ₃Be transformed into by measuring body 10 and measure on the face C, and be marked with groove A, B, during detection at measurement mandrel 6; Insert and measure mandrel 6, in the time of in the measurement face C of measuring body 10 is positioned at two grooves of measuring mandrel 6, the depth dimensions that is judged to be measured hole is qualified; Otherwise defective, concrete conversion Calculation slightly).

With reference to Fig. 2,3,5,6,7; The principle of work of the utility model: connecting rod 3 microcephaly holes are contained on the positioning core axle 2; And the corresponding locating surface of connecting rod lower plane and side plane and instrument is fitted, and regulate fastening bolt 8 connecting rod is fitted on each location closely, do not relatively move; To measure mandrel 6 (φ then ₁And L ₁Measure mandrel) through guide pin bushing 11 holes, be inserted in the tested oilhole of connecting rod, when measurement mandrel 6 can get in the measured hole smoothly; The position that is judged to be the hole is qualified, otherwise defective, will measure mandrel 6 then and continue to move forward along the hole; Fit fully at the bottom of making measurement mandrel 6 end faces and hole, measuring mandrel can not be when moving again, and the measurement face C of instrument is in the two groove A that measure mandrel, B; The depth dimensions that is judged to be the hole is qualified, otherwise defective.The rest may be inferred, with φ ₂And L ₂Measure mandrel, α ₂And L ₃Measure mandrel through guide pin bushing 11 holes, insert respectively and pursue the group detection in the tested oilhole of connecting rod.

With reference to Fig. 3,5,6,7, the utility model is measured the big end oilhole of multiple model specifications such as BYD371QA-5, Q01 respectively, as: BYD371QA-5 parameter: α ₁=28 °, φ ₁=φ 3.2mm, L ₁=12mm, φ ₂=φ 3mm, L ₂=5mm, α ₂=30 °, L ₃=2.15mm; Q01 parameter: α ₁=15 °, φ ₁=φ 3mm, L ₁=10.7mm, φ ₂=φ 1.5mm, L ₂=14.5mm, α ₂=45 °, L ₃=1.5mm.Part connecting rod and three coordinatographs through measuring are measured contrast, and are all qualified, meet technical requirement fully.

Claims

1. engine link major part oilhole survey instrument is characterized in that: tool construction is, at the fixing assembling in the left side of base (a 1) positioning core axle (2); A locating support (5) is fixed with three screws (4) and two pins (7) in the right at base (1), in a side of locating support fastening bolt (8) is installed; Go up and connecting rod (3) major part oilhole (α at locating support (5) ₁) position that angle is identical, through screw (12), pin (9) fixation measuring body (10), stud with guide pin bushing (11) in the hole of measuring body; In guide pin bushing, insert and measure mandrel (6).

2. engine link major part oilhole survey instrument according to claim 1 is characterized in that: measure mandrel (6) and be divided into three groups, be i.e. φ ₁And L ₁One group, φ ₂And L ₂One group, chamfering α ₂And L ₃One group.