CN2283847Y

CN2283847Y - Fatigue-testing machine for spring

Info

Publication number: CN2283847Y
Application number: CN 96243100
Authority: CN
Inventors: 周智松
Original assignee: Wuxi Weifu Group Co ltd
Current assignee: Wuxi Weifu Group Co ltd
Priority date: 1996-11-11
Filing date: 1996-11-11
Publication date: 1998-06-10
Anticipated expiration: 2006-11-11

Abstract

The utility model relates to a fatigue testing machine for springs, which belongs to the field of performance testing equipment for springs. The fatigue testing machine for springs comprises a machine frame, an upper clamping plate, a lower clamping plate, fixing bolts for the upper clamping plate and the lower clamping plate, a quality iron block and driving heads, wherein a spring to be tested is arranged between the clamping plates and the quality iron block, and each driving head is arranged on the machine frame and is composed of an iron core and an exciting coil thereof. One end of the iron core is arranged on the machine frame, and the other end of the iron core is inserted into the exciting coil. The central line of the exciting coil is vertical to the face of the quality iron block. The utility model is characterized in that at least three driving heads are fixedly arranged on the machine frame. Therefore, the testing ability and the service efficiency of the fatigue testing machine for springs can be greatly improved.

Description

The spring fatigue test machine

The utility model belongs to the spring performance testing equipment.

The product that is close most with the utility model is the technical scheme of Chinese patent " efficient spring fatigue test machine " (patent No. 86203703) cloth, and the structural representation of this testing machine is shown in accompanying drawing 1,2.See Fig. 1, Fig. 2, the 1st, frame, the 2nd, upper and lower spring clip plate, the 3rd, test spring, the 7th, the set bolt of spring clip plate 2 up and down; The 4th, the quality iron block, it had both played a supportive role to last lower spring 3, again as by the vibrating mass of electromagnetic actuation, the 5, the 6th, driving head up and down, it is the electromagnet that is made of electromagnetic core and magnetizing coil, the 10th, to the electric power system of driving head power supply up and down.Alternately power to driving

head

5,6 when electric power system 10, alternately produce electromagnetic attracting force quality iron block 4, quality iron block 4 up-down vibration play compression respectively to last lower spring 3.When if the frequency that electric power system 10 is alternately given driving

head

5,6 power supplies is consistent with the natural frequency of the elastic systems of being made up of spring 3, quality iron block 4, this elastic system resonance, the amplitude of quality iron block 4 acquisition maximums, certain spring 3 also obtains the amplitude of maximum.Change electric power system 10 and supply with the size of current of

driving heads

5,6, just the amplitude of regulating spring 3 easily.This promptly is the course of work of the power-actuated resonance type spring fatigue test of electromagnetism machine.

The front elevation of the

driving head

5,6 in the above-mentioned spring fatigue test machine is seen Fig. 2 (Fig. 2 for A-A among Fig. 1 to cut-open view), 8 for being fixed in the driving head iron core on the casing 1 among the figure, 9 is magnetizing coil, and iron core 8 inserts magnetizing coil 9, and magnetizing coil 9 is connected with electric power system 10.Each driving head shown in Fig. 2 is to constitute a secondary electromagnet by an iron core and a cover magnetizing coil.From Fig. 1, Fig. 2 as seen, this spring fatigue test machine only contains two driving heads (being installed on the upper and lower side of casing 1 respectively), thereby driving force is less, and this makes that the spring that is put to the test that at every turn can drop in the spring fatigue test machine is less, and the service efficiency or the test capability of testing machine are lower.

The purpose of this utility model is a kind of spring fatigue test machine that has big driving force, can hold more test spring of design.

The outside organic frame of the utility model, the upper and lower clamping plate of the many groups of device in the frame, device quality iron block between the upper and lower clamping plate, being tried spring is installed between train wheel bridge and the quality iron block respectively and between lower plate and the quality iron block, use set bolt that upper and lower clamping plate are fixed in frame and (spacing preiection portion can be set in the frame both sides, bolt and upper and lower clamping plate hold out against upper and lower clamping plate in the spacing preiection position with being threaded).Install driving head on the frame, each driving head is a secondary electromagnet that is made of an iron stamen and a cover magnetizing coil, iron stamen one end device of driving head is on frame, the other end inserts magnetizing coil, magnetizing coil is connected with electric power system, and of the present utility model being characterised in that has at least three said driving heads to be fixedly installed on the frame.

Since a plurality of driving heads of design, even be designed to the driving head battle array, be installed on many places, can produce the new positive technique effect in two aspects: one, driving force to the quality iron block is strengthened greatly, thereby can increase or increase spring clip plate, holds more test spring; Its two, strengthen the lifting surface area of quality iron block, improve its stressed uniformity coefficient, thereby can improve the stressed uniformity coefficient of the spring that is put to the test, improve the degree of accuracy of test, and can reduce the suffered torsion of machine part, reduce machine vibration, improve its serviceable life.

Fig. 1 is that the master of Chinese patent " efficient spring fatigue test machine " (patent No. 86203703) structure looks cut-open view; Fig. 2 is that A-A among Fig. 1 is to cut-open view;

Fig. 3 is that master of the present utility model looks cut-open view; Fig. 4 is that B-B of the present utility model is to cut-open view.

Below in conjunction with description of drawings embodiment.

See Fig. 3,11 is frame among the figure, and 12 is upper and lower clamping plate, and 13 are the spring that is put to the test, and 14 is the quality iron block.More than the mutual installation site of each parts identical with existing spring fatigue test machine; See Fig. 4,18 is the driving head iron core among the figure, and 19 is magnetizing coil, the 20th, be the electric power system of magnetizing coil power supply.Each driving head comprises an iron core and a cover magnetizing coil, has 8 driving heads to be fixedly installed in the bilateral of frame (upper and lower side) among Fig. 4, can symmetry install or asymmetric installation.Certainly also 8 driving heads can be installed on the one-sided of frame, for example upside or downside.The installation optimum orientation of driving head electromagnet should allow coil centerline vertical with the plate face of quality iron block 14, makes the electromagnetic force of generation vertical with the quality iron block.When driving head only is installed on frame when one-sided, test spring can only be installed between quality iron block and the clamping plate, from stressed homogeneity, dwindle aspect such as machine dimensions and consider that it is better that the driving head symmetry is installed on the support bilateral.Certainly, above-mentioned driving head also can be less than 8 and equal or more than 3 (for example 4), perhaps more than 8 (for example 12), specifically can be designed by the actual needs of test capability, the mode of installing and 8 driving heads mutually roughly the same can be fixed in the one-sided or bilateral of frame.8 2SS-041C type spring fatigue test machines that driving head is made among the utility model Fig. 4 use through reality, compared with the testing machine of 2 driving heads of former usefulness, can improve the test capability (number of springs is put to the test) more than 3 times.

Each driving head of the present utility model can become row to install at one-sided or bilateral, also can become configuration to install, and also can become distributing to install.The magnetizing coil of each driving head should be meant effective magnetizing coil, and it can be a natural coil that comprises two leading-out terminals, also can be the coil groups that natural coil serial or parallel connection or connection in series-parallel all have more than two or two connection forms.The iron core that constitutes magnetic circuit can be the continuous ferromagnetic material element or the ferromagnetic material element composition of separation.

Claims

1, the spring fatigue test machine, its outside organic frame, on installing in the frame, lower plate, on, device quality iron block between the lower plate, the spring that is put to the test is installed between train wheel bridge and the quality iron block respectively and between lower plate and the quality iron block, use set bolt to go up, lower plate is fixed in frame, install driving head on the frame, each driving head is made of an iron core and a cover magnetizing coil, iron core one end device of driving head is on frame, the other end inserts magnetizing coil, and magnetizing coil is connected with electric power system, it is characterized in that having at least three said driving heads to be fixedly installed on the frame.

2, by the said testing machine of claim 1, it is characterized in that said driving head is fixedly installed in the one-sided of frame.

3, by the said testing machine of claim 1, it is characterized in that said driving head is fixedly installed in the bilateral of frame.

4, by claim 1,3 said testing machines, it is characterized in that having four driving heads to be fixedly installed on the frame.

5, by claim 1,3 said testing machines, it is characterized in that having eight driving heads to be fixedly installed on the frame.