CN201955198U

CN201955198U - Mass center rotary inertia measuring device of small car part

Info

Publication number: CN201955198U
Application number: CN2010206796125U
Authority: CN
Inventors: 刘祖斌; 卢炳武; 刘英杰
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2010-12-25
Filing date: 2010-12-25
Publication date: 2011-08-31
Anticipated expiration: 2020-12-25

Abstract

The utility model relates to a mass center rotary inertia measuring device of a small car part, belonging to a rigid body inherent dynamical parameter measuring device. Side vertical columns at the two edges are fixedly connected with bases and are provided with convex knife edges; side frames are fixedly connected with bottom frames and are provided with concave knife edges; the convex knife edges are contacted with the concave knife edges; a lower disc is fixedly connected with the bottom frame; an upper disc and the lower disc are fixedly connected by bolts and nuts and are positioned by positioning pins; a length adjusting guide rail is fixedly connected with the upper disc; tested piece installing arm sleeves are respectively and fixedly connected with the length adjusting guide rail; and weight placing rods are fixedly connected with the bottom frames. The mass center rotary inertia measuring device has the advantages that the structure is novel, the small mass center rotary inertia measuring device is designed specially for 30-120kg small car parts, and the blank without a testing platform for testing the mass center and the inertial parameter of the small measured part in the prior art is made up. The mass center rotary inertia measuring device also has the advantages that the testing accuracy is high, the installation of a measured piece is simple and convenient and the test period is short.

Description

Kart parts barycenter rotation inerttia device

Technical field

The utility model belongs to the intrinsic kinetic parameter measurement mechanism of rigid body, refers in particular to kart parts barycenter, rotation inerttia device.

Background technology

Some kart parts, such as rear axle reductor, vehicle tyre, put-put, small gear-box, electric motor of automobile etc. all is very important parts in the automobile, usually need to know its barycenter and inertial parameter when its Performance Match and optimal design, calculate so that carry out numerical simulation, obtain best performance parameter.

Measuring Object barycenter, moment of inertia have a lot of methods, as three-way arrangement, rock method and physical pendulum method.Three-way arrangement is measured the testee moment of inertia and is had the simple advantage of equipment, but shortcoming is that its measuring accuracy is lower, is wasted time and energy by the installation of test specimen, and the test period is long.Rock method and the physical pendulum ratio juris is basic identical, but the testing table that utilizes the method for rocking to measure, the control that the adjustment of testee various placing attitude on testing table and the measurement of each relative position are difficult to obtain, bring very big influence can for final measuring accuracy, the measuring accuracy that is difficult to obtain, and the test period is also long.

Present stage utilizes the physical pendulum method to measure the testee moment of inertia more and more, corresponding testing table is also arranged, but utilize physical pendulum principle design testing table that fine that several important links must hold arranged, vertical range between the barycenter of the assembly that first backswing axis and testing table and testee are formed is suitable, it two is that the quality and the moment of inertia of testing table itself can not be too big, and it three is that the rigidity of testing table self is wanted enough greatly.These issue handlings are bad, or can not form the physical pendulum principle, or the meeting unstability, or meeting causes error not reach the requirement of test accuracy too greatly and at all because self moment of inertia is too big.

The First Automobile Group technique center is the moment of inertia testing table of design in the past, and its tested object all is at power assembly, and the minimum mass of test must be greater than 100kg, otherwise measuring accuracy is just poor.And such as kart parts or assemblies such as rear axle reductor, vehicle tyre, put-put, small gear-box, electric motor of automobile, because quality is little, moment of inertia is little, and the shape difference opposite sex is bigger, for measure its barycenter, inertial parameter has brought very big trouble.In order to guarantee good measuring accuracy, the quality and the inertia of testing table must be very little, but the warranty test platform has enough strength and stiffness again simultaneously, in process of the test, deform avoiding, influence measuring accuracy, because its design is difficult, therefore, present stage does not also have the testing table at this type of kart parts barycenter, rotation inerttia.

Summary of the invention

The utility model provides a kind of kart parts barycenter rotation inerttia device, to solve the problem of the testing table that does not have kart parts barycenter, rotation inerttia at present.

The technical scheme that the utility model is taked is: the both sides heel post is fixedlyed connected with pedestal, the protruding edge of a knife is arranged on the heel post, bogie side frame is fixedlyed connected with underframe, the recessed edge of a knife is arranged on the bogie side frame, the protruding edge of a knife is connected with recessed edge of a knife contact, lower disc and underframe with fixedly connected, last disk is fixedlyed connected, is located by register pin by screw bolt and nut with lower disc, the length adjustment guide rail is fixedlyed connected with last disk, fixedlyed connected with the length adjustment guide rail respectively by test specimen hold-down arm external member, counterweight placement bar is fixedlyed connected with underframe.

The utility model has the advantages that novel structure, design at 30 ~ 120kg kart parts specially, remedied do not test now small-sized by the blank of test specimen barycenter, inertial parameter testing table, can realize by test specimen on testing table once or twice installation, measure nine static parameters such as barycenter and moment of inertia simultaneously, the error of test bed testing barycenter is no more than 1mm, and the test error of moment of inertia is no more than 1.5%.Have the measuring accuracy height, by the test specimen simple installation, the characteristics that the test period is short.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is a central rotary mechanism synoptic diagram of the present utility model.

Embodiment

Both sides heel post 2 is fixedlyed connected with pedestal 1, the protruding edge of a knife 11 is arranged on the heel post 2, bogie side frame 3 is fixedlyed connected with underframe 5, the recessed edge of a knife 10 is arranged on the bogie side frame 3, the protruding edge of a knife 11 is connected with the recessed edge of a knife 10 contacts, lower disc 7 and underframe 5 with fixedly connected, last disk 6 is fixedlyed connected with nut 13, is located by register pin 14 by bolt 12 with lower disc, length adjustment guide rail 8 is fixedlyed connected with last disk, fixedlyed connected with the length adjustment guide rail respectively by test specimen hold-down arm external member 9, counterweight placement bar 4 is fixedlyed connected with underframe 5.

Claims

1. kart parts barycenter rotation inerttia device, it is characterized in that: the both sides heel post is fixedlyed connected with pedestal, the protruding edge of a knife is arranged on the heel post, bogie side frame is fixedlyed connected with underframe, the recessed edge of a knife is arranged on the bogie side frame, the protruding edge of a knife is connected with recessed edge of a knife contact, lower disc and underframe with fixedly connected, last disk is fixedlyed connected, is located by register pin by screw bolt and nut with lower disc, the length adjustment guide rail is fixedlyed connected with last disk, fixedlyed connected with the length adjustment guide rail respectively by test specimen hold-down arm external member, counterweight placement bar is fixedlyed connected with underframe.