Rapid sample replacement clamp of cantilever beam rotating bending fatigue testing machine

Abstract

The utility model discloses a quick sample replacement fixture of a cantilever beam rotating bending fatigue testing machine, which comprises a mounting seat, a moving mechanism mounted on the mounting seat, clamping seats arranged at two ends of the moving mechanism, clamping mechanisms rotationally mounted on opposite side surfaces of the clamping seats, and driving mechanisms arranged on the clamping mechanisms. According to the device, through the synergistic effect of the moving mechanism and the driving mechanism, rapid clamping and dismounting of the samples are achieved, the moving mechanism can make the clamping base rapidly move to a proper position so as to adapt to the samples of different lengths, and the driving mechanism can rapidly drive the clamping mechanism to complete clamping and loosening actions on the samples of different shapes and specifications; the time for replacing the sample is greatly shortened, and the test efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fatigue machine accessory technical field, specifically, relate to a kind of sample quick replacement fixture of cantilever beam rotary bending fatigue testing machine. BACKGROUND

[0002] Cantilever beam rotary bending fatigue testing machine is a kind of equipment for testing the fatigue performance of material under rotary bending load. During fatigue test, different samples need to be frequently replaced for testing. Therefore, a fixture capable of quickly replacing samples, easy to operate and reliable clamping is needed to improve the use efficiency and test accuracy of cantilever beam rotary bending fatigue testing machine.

[0003] The existing device has the following disadvantages: the existing fixture has low clamping and dismounting efficiency, complex operation, manual tightening and loosening with bolts, nuts and other manual fasteners, time-consuming and labor-intensive; slow response speed, slow clamping action. In terms of adaptability, the size adaptability is weak, and it is difficult to flexibly adapt to different length samples, and the shape specification compatibility is also low. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a kind of sample quick replacement fixture of cantilever beam rotary bending fatigue testing machine to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a kind of sample quick replacement fixture of cantilever beam rotary bending fatigue testing machine, including mounting seat, mobile mechanism is installed on the mounting seat, mobile mechanism both ends are provided with clamping seat, clamping seat opposite side is rotationally installed with clamping mechanism, and driving mechanism is provided on the clamping mechanism.

[0006] As a preferred technical scheme of the utility model, the mobile mechanism includes a pair of parallel guide rails fixedly installed on the mounting seat, a first motor is installed in the middle of one end of the mounting seat, the output shaft of the first motor is connected with a lead screw, and the both ends of the lead screw are threadedly connected with a moving block, and the moving block is fixedly installed with a clamping seat.

[0007] As a preferred technical scheme of the utility model, the clamping mechanism includes a disc rotationally installed in the middle of the clamping seat, the disc side is provided with a plurality of extension cavities around, four sets of limiting grooves are formed on the front surface of the disc, and the limiting grooves are parallel to the extension cavities and are communicated.

[0008] As a preferred technical scheme of the utility model, a moving rod is slidably connected in the extension cavity, a limiting block is slidably connected on the limiting groove, the limiting block is fixedly installed on the moving rod, and a clamping block is fixedly installed at the end of the moving rod.

[0009] As the preferred technical scheme of the utility model, the driving mechanism includes the toothed disc rotatingly installed on the front face of the disc, four groups of driving grooves are penetrated on the toothed disc, and the limiting block is slidingly connected with the driving groove.

[0010] As the preferred technical scheme of the utility model, the toothed disc engages with the gear, the gear is installed on the output shaft of the second motor, and the arc-shaped groove is arranged on the side face of the disc and the second motor is fixedly installed.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The device realizes the quick clamping and dismounting of the sample through the cooperation of the moving mechanism and the driving mechanism, the moving mechanism can move the clamping seat to the appropriate position to adapt to the sample of different lengths, and the driving mechanism can quickly drive the clamping mechanism to complete the clamping and loosening actions of the sample of different shapes and specifications, thereby greatly shortening the time required for replacing the sample and improving the test efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0014] Fig. 1 It is a structural schematic view of the whole of the sample quick replacement clamp of the cantilever beam rotary bending fatigue testing machine according to the utility model embodiment;

[0015] Fig. 2 It is a structural schematic view of the disc of the sample quick replacement clamp of the cantilever beam rotary bending fatigue testing machine according to the utility model embodiment;

[0016] Fig. 3 It is a structural schematic view of the clamping mechanism of the sample quick replacement clamp of the cantilever beam rotary bending fatigue testing machine according to the utility model embodiment.

[0017] Reference signs:

[0018] 1, mounting seat, 2, moving mechanism, 3, clamping seat, 4, clamping mechanism, 5, driving mechanism, 6, guide rail, 7, first motor, 8, screw rod, 9, moving block, 10, disc, 11, telescopic cavity, 12, limiting groove, 13, moving rod, 14, limiting block, 15, clamping block, 16, toothed disc, 17, driving groove, 18, gear, 19, second motor, 20, arc-shaped groove. DETAILED DESCRIPTION

[0019] The utility model is further described below in combination with the drawings and specific embodiments:

[0020] Please refer to Figs. 1-3 The utility model discloses a specimen quick replacement clamp of a cantilever beam rotary bending fatigue testing machine, which comprises a mounting seat 1, a moving mechanism 2 is installed on the mounting seat 1, clamping seats 3 are arranged at the two ends of the moving mechanism 2, clamping mechanisms 4 are rotatably installed on the opposite sides of the clamping seats 3, and driving mechanisms 5 are arranged on the clamping mechanisms 4.

[0021] The mounting seat 1 is used for fixing and supporting the whole structure as a basic part of the whole clamp. The clamping seats 3 move along with the movement of the moving mechanism 2 and are used for clamping the specimen.

[0022] In the embodiment, the moving mechanism 2 comprises a pair of parallel guide rails 6 fixedly installed on the mounting seat 1, a first motor 7 is installed at the middle of one end of the mounting seat 1, a lead screw 8 is connected to the output shaft of the first motor 7, moving blocks 9 are threadedly connected to the two ends of the lead screw 8, and the clamping seats 3 are fixedly installed on the moving blocks 9.

[0023] The parallel guide rails 6 are used for guiding the moving blocks 9 to move along the parallel guide rails 6, so as to ensure the stability and accuracy of the movement. The first motor 7 drives the lead screw 8 through the output shaft, so as to realize the movement of the moving blocks 9.

[0024] In the embodiment, the clamping mechanism 4 comprises a disc 10 rotatably installed at the middle of the clamping seat 3, expansion cavities 11 are formed around the side of the disc 10, four sets of limiting grooves 12 are formed on the front of the disc 10, and the limiting grooves 12 are parallel to and communicate with the expansion cavities 11.

[0025] The disc 10 is used as the main body of the clamping mechanism 4 and realizes the expansion and contraction of the clamping blocks 15 through rotation. The expansion cavities 11 are used for slidably connecting the moving rods 13.

[0026] In the embodiment, the moving rods 13 are slidably connected in the expansion cavities 11, the limiting blocks 14 are slidably connected on the limiting grooves 12, the limiting blocks 14 are fixedly installed on the moving rods 13, and the clamping blocks 15 are fixedly installed at the ends of the moving rods 13.

[0027] The moving rods 13 realize expansion and contraction through the cooperation of the limiting blocks 14 and the limiting grooves 12, so as to control the action of the clamping blocks 15. The limiting blocks 14 limit the expansion and contraction range of the moving rods 13 through sliding in the limiting grooves 12. The clamping blocks 15 are used for directly clamping the specimen.

[0028] In the embodiment, the driving mechanism 5 comprises a toothed disc 16 rotatably installed on the front of the disc 10, four sets of driving grooves 17 are formed through the toothed disc 16, and the limiting blocks 14 are slidably connected in the driving grooves 17.

[0029] The toothed disc 16 is engaged with the gear 18, and rotation is realized by driving of the second motor 19. The driving groove 17 is used for sliding connection of the limiting block 14, and movement of the limiting block 14 is realized.

[0030] In the embodiment, the toothed disc 16 is engaged with the gear 18, the gear 18 is installed on the output shaft of the second motor 19, and the arc-shaped groove 20 is formed on the side of the disc 10 and the second motor 19 is fixedly installed.

[0031] The second motor 19 drives the gear 18 through the output shaft, and then drives the toothed disc 16 to rotate, so as to control the clamping and releasing actions of the clamping block 15. The arc-shaped groove 20 is used for fixed installation of the second motor 19.

[0032] In the specific application, firstly, the mounting seat 1 is stably installed at a suitable position of the cantilever beam rotary bending fatigue testing machine, the first motor 7 is started to drive the screw rod 8 to rotate, the rotation of the screw rod 8 drives the moving block 9 to move along the parallel guide rail 6, the clamping seat 3 moves with the moving block 9, and the clamping seat 3 is adjusted to a suitable interval position according to the length of the sample to be tested, so as to clamp the sample in the subsequent process. The sample to be tested is placed between the two clamping seats 3, the second motor 19 is started to drive the gear 18 to rotate, the driving groove 17 drives the limiting block 14 to move when the toothed disc 16 rotates, the movement of the limiting block 14 drives the moving rod 13 to perform the extension and contraction movement in the extension and contraction cavity 11, the clamping block 15 gradually approaches the sample and clamps the sample by contraction of the moving rod 13, after the sample is clamped firmly, the cantilever beam rotary bending fatigue testing machine is started, and the sample is subjected to the rotary bending fatigue test according to the predetermined test parameters. When the test is completed, the second motor 19 is started again to drive the toothed disc 16 to rotate reversely, and then the moving rod 13 is extended in the extension and contraction cavity 11, the clamping block 15 releases the clamping of the sample, and the sample after the test is completed is taken out. If the test needs to be continued, the above steps are repeated, and the new sample to be tested is placed for the next round of test.

[0033] In the description of the utility model, it is necessary to explain that the terms "top", "bottom", "one side", "the other side", "front", "back", "intermediate position", "interior", "top end", "bottom end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0034] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can modify the technical scheme recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A quick-change fixture for specimens in a cantilever beam rotary bending fatigue testing machine, characterized in that, Includes a mounting base (1), on which a moving mechanism (2) is mounted, and at both ends of the moving mechanism (2) are clamps (3), and on opposite sides of the clamps (3) are rotatably mounted clamping mechanisms (4), and on the clamping mechanisms (4) are driven mechanisms (5).

2. The quick-change fixture for specimens in a cantilever beam rotary bending fatigue testing machine according to claim 1, characterized in that, The moving mechanism (2) includes a pair of parallel guide rails (6) fixedly installed on the mounting base (1). A first motor (7) is installed at the middle of one end of the mounting base (1). The output shaft of the first motor (7) is connected to a lead screw (8). Both ends of the lead screw (8) are threadedly connected to moving blocks (9). A clamp (3) is fixedly installed on the moving block (9).

3. The quick-change fixture for specimens in a cantilever beam rotary bending fatigue testing machine according to claim 1, characterized in that, The clamping mechanism (4) includes a disc (10) rotatably mounted in the middle of the clamping seat (3). The disc (10) has telescopic cavities (11) on all four sides. The disc (10) has four sets of limiting grooves (12) on the front side. The limiting grooves (12) are parallel to and connected to the telescopic cavities (11).

4. The quick-change fixture for specimens in a cantilever beam rotary bending fatigue testing machine according to claim 3, characterized in that, A movable rod (13) is slidably connected inside the telescopic cavity (11), and a limiting block (14) is slidably connected on the limiting groove (12). The limiting block (14) is fixedly installed on the movable rod (13), and a clamping block (15) is fixedly installed at the end of the movable rod (13).

5. The quick-change fixture for a cantilever beam rotary bending fatigue testing machine according to claim 4, characterized in that, The drive mechanism (5) includes a geared disc (16) rotatably mounted on the front of the disc (10), and four sets of drive slots (17) are provided through the geared disc (16). The limiting block (14) is slidably connected to the drive slots (17).

6. The quick-change fixture for a cantilever beam rotary bending fatigue testing machine according to claim 5, characterized in that, The gear disc (16) meshes with the gear (18), the gear (18) is mounted on the output shaft of the second motor (19), and the disc (10) has an arc groove (20) on its side and the second motor (19) is fixedly mounted thereon.

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