Background technology
Spring product is after producing, and the product needed of each batch is inspected some samples by random samples and carried out fatigue detecting.Testing fatigue promptly is that spring is carried out repeatedly compression, through behind the several times, checks whether spring product crackle or fracture occur, thereby judges whether spring product meets the quality requirements of product.One is not provided with the length of spring compressed stroke control mechanism existing spring fatigue proving installation, as the patent No. 00221352.4 " spring fatigue test machine ", this structure is to drive the pressing plate compression spring by rotating handwheel, can't the automatic control spring compression travel, therefore its testing fatigue degree of accuracy is low, and efficient is low.
Summary of the invention
The purpose of this utility model provides a kind of spring fatigue proving installation that spring is compressed repeatedly of being used for.
For achieving the above object, spring fatigue proving installation of the present utility model comprises frame, runner, connecting rod, top board and lower roof plate, described runner center is rotatably connected on the frame, frame is provided with two above guideposts, and top board is set on the guidepost, and an end off-centre of connecting rod is articulated on the runner, the other end of connecting rod is articulated on the top board, the top board below is provided with lower roof plate, and lower roof plate is located on the frame, and tested spring is arranged between top board and the lower roof plate.Adopt above structure, the rotation drivening rod of runner moves, and further drive top board and pump, and the lower roof plate relative fixed, tested spring places between top board and the lower roof plate, thereby realizes the compression repeatedly to tested spring.
Runner of the present utility model is provided with chute, is provided with slide block in the chute, and slide block is by regulating bolt, and an end of connecting rod is hinged on the slide block.By adjusting the fixed position of slide block in chute, can change the articulated position of connecting rod on runner, thereby further adjust the suppressed range of top board spring.
Lower roof plate of the present utility model bottom surface is fixed on an end of adjuster bar, and adjuster bar and frame are threaded engagement, and its other end is provided with handle.By the rotation adjuster bar, can adjust the position of lower roof plate, thereby the distance between change lower roof plate by a relatively large margin and the top board makes this device can be suitable for the spring product with any model.
The upper surface correspondence of the lower surface of top board of the present utility model and lower roof plate is provided with the spring locating slot.This structure can effectively avoid tested spring to depart from test position in compression process repeatedly.
Spring fatigue proving installation of the present utility model also comprises counter, and this counter links to each other with runner.Counter can write down the rotation number of turns of runner, thereby further judges the compression number of times of tested spring.
Of the present utility modelly can carry out repeatedly compression, thereby effectively spring product be carried out testing fatigue spring product.
Embodiment
As shown in Figure 1, spring fatigue proving installation of the present utility model comprises frame 1, runner 2, connecting rod 3, top board 4 and lower roof plate 5, described runner 2 centers are rotatably connected on the frame 1, frame 1 is provided with two above guideposts 11, top board 4 is set on the guidepost 11, and runner 2 is provided with chute 21, is provided with slide block 22 in the chute 21, slide block 22 is fixing by regulating bolt 23, and an end 31 of connecting rod 3 is hinged on the slide block 22.The other end 32 of connecting rod 3 is articulated on the top board 4, top board 4 belows are provided with lower roof plate 5, and lower roof plate 5 bottom surfaces are fixed on an end of adjuster bar 51, and adjuster bar 51 is a threaded engagement with frame 1, its other end is provided with handle 52, and tested spring 6 is arranged between top board 4 and the lower roof plate 5.The upper surface correspondence of the lower surface of top board 4 and lower roof plate 5 is provided with spring locating slot 7.Spring fatigue proving installation of the present utility model also comprises counter 8, and this counter 8 links to each other with runner 2.