Fatigue test fixture

Abstract

The utility model relates to the technical field of clamps, and discloses a fatigue test clamp, which comprises a pair of mounting racks, synchronous moving assemblies are respectively arranged on the opposite end surfaces of the pair of mounting racks, and a pair of clamping plates are in sliding fit with the synchronous moving assemblies; a pair of first long gears are movably arranged in the connecting cylinder, the pair of first long gears are fixedly connected with connecting rods correspondingly, the pair of connecting rods are rotationally connected with the pair of mounting frames one by one correspondingly, the connecting rods are in transmission connection with the synchronous moving assembly through a first gear set, and the pair of first long gears are engaged with a second long gear; the two ends of the second long gear are fixedly connected with a first supporting rod and a second supporting rod respectively, the first supporting rod is in transmission connection with a rotating rod through a second gear set, and a limiting assembly is arranged between the second supporting rod and the connecting cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of jigs, in particular to a fatigue test jig. Background Art

[0002] Fatigue tests are mainly used to determine the fatigue performance of metals and their alloy materials under tensile, compressive, or tensile-compressive alternating loads at room temperature.

[0003] During the fatigue test process, it is necessary to install the jig on the fatigue testing machine, and the jig clamps and fixes the specimen. However, the existing jigs are usually divided into two separate mounting brackets, which are respectively connected to two mounting positions of the fatigue testing machine, and then the specimen is placed between the two mounting brackets, and the clamping plates on the two mounting brackets are respectively adjusted to clamp the specimen, and the operation method is relatively cumbersome. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a fatigue test jig, aiming to solve or improve at least one of the above technical problems.

[0005] To achieve the above purpose, the utility model provides the following solution: The utility model provides a fatigue test jig, comprising:

[0006] A pair of mounting brackets, on the opposite end faces of the pair of mounting brackets, synchronous moving components are respectively arranged, and a pair of clamping plates are slidably matched on the synchronous moving components;

[0007] A connecting cylinder, in which a pair of first long gears are movably arranged, the pair of first long gears are respectively fixedly connected with connecting rods, the pair of connecting rods are respectively rotatably connected with the pair of mounting brackets one by one, the connecting rods are in transmission connection with the synchronous moving components through a first gear set, the pair of first long gears are meshed with a second long gear, a notch for accommodating the second long gear is formed on the side wall of the connecting cylinder, the second long gear is rotatably connected to the outer side wall of the connecting cylinder, the two ends of the second long gear are respectively fixedly connected with a first support rod and a second support rod, the first support rod is in transmission connection with a rotating rod through a second gear set, the rotating rod is rotatably connected to the outer side wall of the connecting cylinder, and a limiting component is arranged between the second support rod and the connecting cylinder.

[0008] Optionally, the synchronous moving component includes a bidirectional screw rod, which is rotatably connected to the mounting frame, the two sections of the thread of the bidirectional screw rod are arranged in opposite directions, and the two sections of the thread are respectively equipped with ball nuts for transmission, the two ball nuts are respectively fixedly connected to a pair of the clamping plates one by one, and parallel light rods are respectively arranged on both sides of the bidirectional screw rod, the light rods are fixedly connected to the mounting frame, the light rods pass through the ball nuts and are slidably equipped with the ball nuts, and the bidirectional screw rod is connected to the connecting rod through a first gear set.

[0009] Optionally, the first gear set includes a first main bevel gear and a first secondary bevel gear meshing with each other, the first main bevel gear is fixedly connected to the connecting rod, and the first secondary bevel gear is fixedly connected to the bidirectional screw rod.

[0010] Optionally, the second gear set includes a second main bevel gear and a second secondary bevel gear meshing with each other, the second main bevel gear is fixedly connected to the rotating rod, and the second secondary bevel gear is fixedly connected to the first supporting rod.

[0011] Optionally, the limiting assembly includes a fixing ring and a limiting ring which are sleeved on the second support rod, the fixing ring is fixedly connected to the connecting tube, the limiting ring is slidably connected to the second support rod, a plurality of holes are circumferentially opened on the limiting ring, a plurality of plug rods are fixedly connected to the fixing ring, and a plurality of the holes are plugged into a plurality of the plug rods.

[0012] Optionally, a groove is provided in the second support rod, a screw rod is rotatably connected in the groove, a limit nut is provided on the outer sleeve of the screw rod, a pair of guide grooves respectively connected to the grooves are provided on the side walls of the second support rod, a guide block is slidably fitted in the guide groove, the guide block is fixedly connected to the limit nut, and the limit ring is fixedly connected to the pair of guide blocks.

[0013] Optionally, through holes for the connecting rod to pass through are respectively formed at both ends of the connecting tube, and the diameter of the through hole is smaller than the diameter of the first long gear.

[0014] Optionally, a pair of mounting frames are respectively fixedly connected to mounting rods at opposite ends thereof.

[0015] The utility model discloses the following technical effects: After connecting two mounting brackets to the fatigue testing machine, a pair of first long gears movably arranged in the connecting cylinder and a connecting rod connected to the first long gears are respectively in transmission connection with the synchronous moving components on the two mounting brackets. Moreover, in the way that the first long gear meshes with the second long gear, when the mounting bracket displaces, the first long gear can slide along the second long gear while remaining in the meshing state. Only by releasing the locking state between the second support rod and the connecting cylinder through the limiting component, rotating the rotating rod, driving the first support rod and the second long gear to rotate by the second gear set, driving the pair of first long gears to rotate synchronously by the second long gear, and then driving the synchronous moving component to rotate by the first gear set, so that a pair of clamping plates on the synchronous moving component approach or move away from each other, the synchronous clamping or relaxation operation of both ends of the specimen can be realized, which simplifies the operation steps and saves manpower and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation to this application. In the drawings:

[0017] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 is Figure 1 a partial enlarged view of A in

[0019] Figure 3 is Figure 1 a partial enlarged view of B in

[0020] Figure 4 is a cross-sectional view of the second support rod of the utility model;

[0021] Figure 5 is a schematic diagram of the fixed ring and the limiting ring of the utility model.

[0022] In the figure: 1, mounting bracket; 2, clamping plate; 3, connecting cylinder; 4, first long gear; 5, connecting rod; 6, second long gear; 7, first support rod; 8, second support rod; 9, rotating rod; 10, bidirectional lead screw; 11, ball nut; 12, optical rod; 13, first main bevel gear; 14, first driven bevel gear; 15, second main bevel gear; 16, second driven bevel gear; 17, fixed ring; 18, limiting ring; 19, jack; 20, inserting rod; 21, groove; 22, screw; 23, limiting nut; 24, guiding groove; 25, guiding block; 26, through hole; 27, mounting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] Reference Figures 1 - 5 The utility model provides a fatigue test fixture, comprising:

[0026] A pair of mounting frames 1, the opposite end surfaces of the pair of mounting frames 1 are respectively provided with synchronous moving components, and a pair of clamping plates 2 are slidably matched on the synchronous moving components;

[0027] A connecting cylinder 3, in which a pair of first long gears 4 are movably arranged, the pair of first long gears 4 are respectively fixedly connected to connecting rods 5, the pair of connecting rods 5 are respectively rotatably connected to a pair of mounting frames 1, the connecting rods 5 are transmission-connected to a synchronous moving component through a first gear set, a pair of first long gears 4 are meshed with a second long gear 6, a notch for accommodating the second long gear 6 is provided on the side wall of the connecting cylinder 3, the second long gear 6 is rotationally connected to the outer side wall of the connecting cylinder 3, the first support rod 7 and the second support rod 8 are respectively fixedly connected at both ends of the second long gear 6, the first support rod 7 is transmission-connected to a rotating rod 9 through the second gear set, the rotating rod 9 is rotationally connected to the outer side wall of the connecting cylinder 3, and a limiting assembly is arranged between the second support rod 8 and the connecting cylinder 3.

[0028] After connecting the two mounting frames 1 to the fatigue testing machine, a pair of first long gears 4 movably arranged in the connecting tube 3 and a connecting rod 5 connected to the first long gear 4 are respectively connected to the synchronous moving components on the two mounting frames 1, and the first long gear 4 is meshed with the second long gear 6. When the mounting frame 1 is displaced, the first long gear 4 can slide along the second long gear 6 in a meshing state. It is only necessary to release the locking state between the second support rod 8 and the connecting tube 3 through the limit assembly, and rotate the rotating rod 9 to drive the first support rod 7 and the second long gear 6 to rotate by the second gear group, and the pair of first long gears 4 are driven to rotate synchronously by the second long gear 6, so that the synchronous moving component is driven to rotate by the first gear group, so that a pair of clamps 2 on the synchronous moving component are close to or away from each other, so that the synchronous clamping or loosening operation of the two ends of the sample can be realized, which simplifies the operation steps and saves manpower and time.

[0029] A further optimized solution is that the synchronous moving component includes a bidirectional screw rod 10, which is rotatably connected to the mounting frame 1. The two sections of the thread of the bidirectional screw rod 10 are arranged oppositely, and the two sections of the thread are respectively matched with ball nuts 11 for transmission. The two ball nuts 11 are respectively fixedly connected to a pair of clamps 2 one by one. Parallel light rods 12 are respectively arranged on both sides of the bidirectional screw rod 10. The light rod 12 is fixedly connected to the mounting frame 1. The light rod 12 passes through the ball nut 11 and is slidably matched with the ball nut 11. The bidirectional screw rod 10 is connected to the connecting rod 5 through a first gear set for transmission.

[0030] By rotating the bidirectional screw 10 and guided by the polished rod 12 , the ball nut 11 can drive the clamping plates 2 to slide synchronously, thereby realizing the movement of a pair of clamping plates 2 on the bidirectional screw 10 toward or away from each other.

[0031] According to a further optimized solution, the first gear set includes a first main bevel gear 13 and a first slave bevel gear 14 that are meshed with each other. The first main bevel gear 13 is fixedly connected to the connecting rod 5 , and the first slave bevel gear 14 is fixedly connected to the bidirectional screw rod 10 .

[0032] According to a further optimized solution, the second gear set includes a second main bevel gear 15 and a second secondary bevel gear 16 which are meshed with each other. The second main bevel gear 15 is fixedly connected to the rotating rod 9 , and the second secondary bevel gear 16 is fixedly connected to the first supporting rod 7 .

[0033] Further optimized solution, the limit assembly includes a fixed ring 17 and a limit ring 18 sleeved on the second support rod 8, the fixed ring 17 is fixedly connected to the connecting tube 3, the limit ring 18 is slidably connected to the second support rod 8, a plurality of plug holes 19 are circumferentially opened on the limit ring 18, a plurality of plug rods 20 are fixedly connected to the fixed ring 17, and a plurality of plug holes 19 are plugged with a plurality of plug rods 20. A groove 21 is opened in the second support rod 8, a screw rod 22 is rotatably connected in the groove 21, a limit nut 23 is provided on the outer sleeve of the screw 22, a pair of guide grooves 24 respectively connected to the groove 21 are opened on the side wall of the second support rod 8, a guide block 25 is slidably matched in the guide groove 24, the guide block 25 is fixedly connected to the limit nut 23, and the limit ring 18 is fixedly connected to the pair of guide blocks 25.

[0034] By rotating the screw rod 22, the guide block 25 and the guide groove 24 provide guidance, so that the limit nut 23 is displaced, driving the guide block 25 to move synchronously, and the guide block 25 drives the limit ring 18 to move synchronously, so that the socket 19 on the limit ring 18 can be plugged into the plug rod 20 on the fixed ring 17, thereby controlling the locking state of the second long gear 6.

[0035] As a further optimization scheme, through holes 26 for the connecting rod 5 to pass through are respectively opened at both ends of the connecting tube 3 , and the diameter of the through hole 26 is smaller than the diameter of the first long gear 4 to prevent the first long gear 4 from escaping from the connecting tube 3 .

[0036] For a further optimized solution, mounting rods 27 are fixedly connected to the opposite ends of a pair of mounting brackets 1 respectively, and the mounting rods 27 are used for connecting with the mounting positions on the fatigue testing machine.

[0037] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0038] The embodiments described above are only descriptions of the preferred modes of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A fatigue test fixture, characterized in that: include: A pair of mounting frames (1), the opposite end faces of the pair of mounting frames (1) being respectively provided with synchronous moving components, and a pair of clamping plates (2) being slidably matched on the synchronous moving components; A connecting cylinder (3), wherein a pair of first long gears (4) are movably arranged in the connecting cylinder (3), the pair of first long gears (4) are respectively fixedly connected to connecting rods (5), the pair of connecting rods (5) are respectively rotatably connected to the mounting frame (1), the connecting rods (5) are transmission-connected to the synchronous moving component through a first gear set, the pair of first long gears (4) are meshed with a second long gear (6), a notch for accommodating the second long gear (6) is provided on the side wall of the connecting cylinder (3), the second long gear (6) is rotationally connected to the outer wall of the connecting cylinder (3), the two ends of the second long gear (6) are respectively fixedly connected to a first support rod (7) and a second support rod (8), the first support rod (7) is transmission-connected to a rotating rod (9) through a second gear set, the rotating rod (9) is rotationally connected to the outer wall of the connecting cylinder (3), and a limiting assembly is arranged between the second support rod (8) and the connecting cylinder (3).

2. A fatigue test fixture according to claim 1, characterized in that: The synchronous moving component comprises a bidirectional screw (10), the bidirectional screw (10) is rotatably connected to the mounting frame (1), the two sections of the thread of the bidirectional screw (10) are arranged opposite to each other, and the two sections of the thread are respectively matched with ball nuts (11), the two ball nuts (11) are respectively fixedly connected to a pair of clamping plates (2), parallel light rods (12) are respectively arranged on both sides of the bidirectional screw (10), the light rods (12) are fixedly connected to the mounting frame (1), the light rods (12) pass through the ball nuts (11) and are slidably matched with the ball nuts (11), and the bidirectional screw (10) is connected to the connecting rod (5) through a first gear set.

3. A fatigue test fixture according to claim 2, characterized in that: The first gear set comprises a first main bevel gear (13) and a first secondary bevel gear (14) meshing with each other, the first main bevel gear (13) being fixedly connected to the connecting rod (5), and the first secondary bevel gear (14) being fixedly connected to the bidirectional screw rod (10).

4. A fatigue test fixture according to claim 1, characterized in that: The second gear set comprises a second main bevel gear (15) and a second secondary bevel gear (16) which are meshed with each other, the second main bevel gear (15) being fixedly connected to the rotating rod (9), and the second secondary bevel gear (16) being fixedly connected to the first supporting rod (7).

5. A fatigue test fixture according to claim 1, characterized in that: The limiting assembly comprises a fixing ring (17) and a limiting ring (18) which are sleeved on the second support rod (8); the fixing ring (17) is fixedly connected to the connecting tube (3); the limiting ring (18) is slidably connected to the second support rod (8); a plurality of insertion holes (19) are circumferentially formed on the limiting ring (18); a plurality of insertion rods (20) are fixedly connected to the fixing ring (17); and a plurality of the insertion holes (19) are plugged into a plurality of the insertion rods (20).

6. A fatigue test fixture according to claim 5, characterized in that: A groove (21) is provided in the second support rod (8), a screw rod (22) is rotatably connected in the groove (21), a limiting nut (23) is provided on the outer sleeve of the screw rod (22), a pair of guide grooves (24) respectively connected to the grooves (21) are provided on the side wall of the second support rod (8), a guide block (25) is slidably fitted in the guide groove (24), the guide block (25) is fixedly connected to the limiting nut (23), and the limiting ring (18) is fixedly connected to the pair of guide blocks (25).

7. A fatigue test fixture according to claim 1, characterized in that: Through holes (26) for the connecting rod (5) to pass through are respectively formed at both ends of the connecting tube (3), and the diameter of the through hole (26) is smaller than the diameter of the first long gear (4).

8. A fatigue test fixture according to claim 1, characterized in that: A pair of mounting frames (1) are respectively fixedly connected to mounting rods (27) at opposite ends thereof.

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