Spring fatigue testing device

Abstract

The utility model discloses a spring fatigue testing device, which relates to the technical field of spring testing and comprises a machine frame, a fixing disc is fixed in the middle of the machine frame, a pressing disc is arranged right above the fixing disc, and a guide column is vertically and slidably installed on the inner side of the machine frame. An upper mounting plate and a lower mounting plate are fixed to the upper end and the lower end of the guide column respectively, and the pressing disc is mounted at the inner top end of the upper mounting plate. The driving assembly is mounted at the inner bottom end of the rack so as to drive the lower mounting plate to move up and down in a reciprocating manner; a positioning structure for positioning the spring is arranged between the fixed disc and the pressure disc; according to the utility model, the positioning column for positioning the spring is arranged between the fixed disc and the pressure disc, and the spring to be tested is sleeved on the outer side of the positioning column to be effectively positioned, so that the spring can be prevented from being easily deformed in the non-working direction in the testing process, and the testing error of the spring is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to spring test technical field, concretely is a kind of spring fatigue testing device. BACKGROUND

[0002] Spring is a kind of mechanical parts using elasticity to work.Parts made of elastic material are deformed under the action of external force, and restore to original shape after removing external force. Since the reset function of spring will gradually weaken after being used for a period of time, it eventually leads to the failure of spring. Therefore, the reset ability of spring is a key factor directly affecting the service life of spring. For this reason, people often use spring fatigue testing machine to test the reset function of spring, so as to test the service life of spring, and further ensure the normal use of spring.

[0003] The positioning effect of conventional spring fatigue testing machine on the spring to be tested is poor, which leads to the deformation of spring in its non-working direction during the test process, and further leads to the increase of test error.

[0004] Therefore, there is an urgent need for a kind of spring fatigue testing device to improve the above problems. INVENTION CONTENTS

[0005] In view of the problems existing in the prior art, the utility model solves the problem by the following technical structure.

[0006] To achieve the above object, the utility model adopts the following technical scheme:

[0007] A kind of spring fatigue testing device, comprising:

[0008] Frame, the fixed disc is arranged on the frame, the pressure disc is arranged above the fixed disc, the guide column is vertically slidably installed on the frame, the upper and lower ends of the guide column are respectively fixed with upper mounting plate and lower mounting plate, and the pressure disc is installed below the upper mounting plate;

[0009] Drive assembly is used to drive the lower mounting plate to reciprocate up and down.

[0010] Positioning structure for positioning spring is arranged between the fixed disc and the pressure disc.

[0011] Further features are:

[0012] The positioning structure includes positioning column, the positioning column is vertically installed at the top end of the fixed disc, and the pressure disc is provided with sliding hole for the positioning column to slide through.

[0013] The positioning column is provided with multiple, and multiple positioning columns are evenly distributed at the top end of the fixed disc, and multiple sliding holes are correspondingly provided.

[0014] The diameters of the plurality of positioning columns are different.

[0015] The bottom end of the positioning column is provided with a threaded stud, and the fixing disc is provided with a threaded hole matched with the threaded stud.

[0016] The driving assembly comprises a driving motor, two transmission pulleys, a transmission disc and a connecting rod.

[0017] The driving motor and the transmission disc are both mounted on the inner side of the rack, the two transmission pulleys are coaxially connected with the output end of the driving motor and the transmission disc respectively, the transmission belt is sleeved on the two transmission pulleys, the bottom end of the connecting rod is rotationally connected with a non-circular center position of the transmission disc, and the top end of the connecting rod is rotationally connected with the lower mounting plate.

[0018] A first adjusting assembly for adjusting the movement range of the lower mounting plate is arranged between the transmission disc and the connecting rod.

[0019] The first adjusting assembly comprises a mounting block, a limiting sliding block and a first adjusting screw.

[0020] The mounting block is rotationally mounted on the bottom end of the connecting rod, the limiting sliding block is connected with the mounting block, the limiting sliding block is slidingly mounted on the transmission disc, and the first adjusting screw is rotationally mounted on the transmission disc and threadedly penetrates the limiting sliding block.

[0021] A second adjusting assembly for adjusting the height of the pressing disc is arranged between the pressing disc and the upper mounting plate.

[0022] The second adjusting assembly comprises a limiting sliding sleeve, a limiting sliding column and a second adjusting screw.

[0023] The limiting sliding sleeve is vertically fixed on the upper mounting plate, one end of the limiting sliding column is slidingly arranged in the limiting sliding sleeve, the bottom end of the limiting sliding column is connected with the pressing disc, the second adjusting screw is rotationally mounted on the top end of the limiting sliding sleeve, and the bottom end of the second adjusting screw is arranged in the limiting sliding column and is threadedly connected with the limiting sliding column.

[0024] The above structure of the utility model can achieve the following beneficial effects:

[0025] The positioning column is arranged between the fixing disc and the pressing disc to position the spring to be tested outside the positioning column, so that the deformation of the spring in the non-working direction during the test can be avoided, and the test error is reduced; a plurality of positioning columns are arranged, so that a plurality of springs to be tested can be tested at one time, and the test efficiency is higher; and the plurality of positioning columns with different diameters can better meet the positioning requirements of springs with different sizes, and the applicability is higher. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 It is a schematic diagram of the overall structure of the embodiment;

[0027] Fig. 2 It is a schematic diagram of the side structure of the embodiment;

[0028] Fig. 3 It is a schematic diagram of the structure of the fixed disc and the positioning column in the embodiment;

[0029] Fig. 4 It is a schematic diagram of the structure at the pressure disc in the embodiment;

[0030] Fig. 5 It is a schematic diagram of the structure at the transmission disc in the embodiment.

[0031] In the figure: 1, frame; 2, fixed disc; 201, screw hole; 3, upper mounting plate; 4, pressure disc; 401, sliding hole; 5, lower mounting plate; 6, driving motor; 7, transmission pulley; 8, transmission belt; 9, transmission disc; 10, connecting rod; 11, guide column; 12, limiting sliding sleeve; 13, limiting sliding column; 14, second adjusting screw; 15, mounting block; 16, limiting sliding block; 17, first adjusting screw; 18, positioning column; 19, stud. DETAILED DESCRIPTION

[0032] In order to make the person skilled in the art better understand the technical scheme of the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0033] It should be noted that the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion, for example, a process, method, device, product or equipment containing a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0034] The following will be described in detail in combination with the drawings Figs. 1-5 The present application will be further described in detail.

[0035] Reference Figs. 1-5The spring fatigue testing device shown includes a frame 1 and a drive assembly. A fixed plate 2 is fixed in the middle of the frame 1, and a pressure plate 4 is arranged directly above the fixed plate 2. A guide column 11 is vertically slidably installed on the inner side of the frame 1. The upper mounting plate 3 and the lower mounting plate 5 are fixed at the upper and lower ends of the guide column 11 respectively. The pressure plate 4 is installed on the inner top end of the upper mounting plate 3.

[0036] The driving assembly is installed at the inner bottom end of the frame 1 to drive the lower mounting plate 5 to move reciprocatingly up and down. Specifically, the driving assembly includes a driving motor 6, a transmission pulley 7, a transmission belt 8, a transmission disc 9 and a connecting rod 10. The driving motor 6 is installed on the inner side of the frame 1, and the transmission disc 9 is rotatably installed on the inner side of the frame 1. The two transmission pulleys 7 are coaxially connected with the output end of the driving motor 6 and the transmission disc 9 respectively. The transmission belt 8 is sleeved between the two transmission pulleys 7. The bottom end of the connecting rod 10 is rotatably connected to the non-center position of the transmission disc 9, and the top end of the connecting rod 10 is rotatably connected to the lower mounting plate 5; the transmission disc 9 is driven to rotate by the driving motor 6, the transmission pulley 7 and the transmission belt 8. The connecting rod 10 drives the lower mounting plate 5 to move reciprocatingly up and down during the rotation of the transmission disc 9, thereby driving the upper mounting plate 3 and the pressure plate 4 to move reciprocatingly up and down through the guide column 11, and fatigue testing is performed on the spring vertically placed between the fixed plate 2 and the pressure plate 4.

[0037] A positioning structure for positioning the spring is provided between the fixed plate 2 and the pressure plate 4 to effectively position the spring to be tested, thereby preventing the spring from deforming in its non-working direction during the test and reducing its test error.

[0038] Specifically, the positioning structure includes a positioning column 18, which is vertically installed on the top of the fixed plate 2. The pressure plate 4 is provided with a sliding hole 401 for the positioning column 18 to slide through. When in use, the spring to be tested can be placed on the outside of the positioning column 18.

[0039] Further optimization is, Figs. 1-3 As shown, there are multiple positioning posts 18, and the multiple positioning posts 18 are evenly distributed on the top of the fixed plate 2, and there are also multiple sliding holes 401 correspondingly provided, so that multiple springs to be tested can be tested at one time, and the testing efficiency is higher.

[0040] In order to meet the positioning requirements of springs of different sizes, the diameters of the plurality of positioning posts 18 are different, and the plurality of sliding holes 401 are provided in a one-to-one correspondence with the plurality of positioning posts 18 .

[0041] In order to facilitate replacement of the positioning column 18 , a stud 19 is integrally provided at the bottom end of the positioning column 18 , and a screw hole 201 threadably matched with the stud 19 is provided on the fixing plate 2 .

[0042] A first adjustment component is provided between the transmission plate 9 and the connecting rod 10. Specifically, Fig. 5The first adjusting assembly includes a mounting block 15, a limiting sliding block 16 and a first adjusting screw 17. The mounting block 15 is rotationally mounted at the bottom end of the connecting rod 10. The limiting sliding block 16 is connected with the mounting block 15 and is slidingly mounted on the transmission disc 9. The first adjusting screw 17 is rotationally mounted on the transmission disc 9, penetrates through the limiting sliding block 16 and is threadedly connected with the limiting sliding block 16. One end of the first adjusting screw 17 points to the center of the transmission disc 9. The operator manually rotates the first adjusting screw 17, so that the limiting sliding block 16 slides on the surface of the transmission disc 9, thereby moving the bottom end of the connecting rod 10 on the radius path of the transmission disc 9. Specifically, the closer the bottom end of the connecting rod 10 is to the center of the transmission disc 9, the smaller the compression amount of the spring is, and vice versa. The manual adjustment according to the actual test requirement is facilitated, and the device is more convenient and reliable.

[0043] The second adjusting assembly is arranged between the compression disc 4 and the upper mounting plate 3. Specifically, as shown in Fig. 4 The second adjusting assembly includes a limiting sliding sleeve 12, a limiting sliding column 13 and a second adjusting screw 14. The limiting sliding sleeve 12 is vertically fixed on the upper mounting plate 3. One end of the limiting sliding column 13 is slidingly arranged in the limiting sliding sleeve 12. The bottom end of the limiting sliding column 13 is connected with the compression disc 4. The second adjusting screw 14 is rotationally mounted at the top end of the limiting sliding sleeve 12. The bottom end of the second adjusting screw 14 penetrates through the limiting sliding column 13 and is threadedly connected with the limiting sliding column 13. For springs with different lengths, the operator can adjust the position of the limiting sliding column 13 in the limiting sliding sleeve 12 by rotating the second adjusting screw 14, so as to adjust the horizontal plane where the compression disc 4 is located. Specifically, in the initial state (i.e. when the bottom end of the connecting rod 10 is located directly above the center of the transmission disc 9), the bottom surface of the compression disc 4 is made to just contact the top surface of the spring. After the test is completed, the distance between the top surface of the spring and the bottom surface of the compression disc 4 is observed. The greater the distance is, the worse the fatigue resistance performance of the spring is, and vice versa. The device is more intuitive.

[0044] In summary, in the initial state (i.e. when the bottom end of the connecting rod 10 is located directly above the center of the transmission disc 9), the spring to be tested is sleeved outside the positioning column 18 with a size suitable for the spring. The position of the limiting sliding column 13 in the limiting sliding sleeve 12 is adjusted by rotating the second adjusting screw 14, so that the bottom surface of the compression disc 4 just contacts the top surface of the spring. The driving motor 6, the transmission pulley 7 and the transmission belt 8 are used to drive the transmission disc 9 to rotate. The connecting rod 10 moves up and down reciprocatingly in the rotation process of the transmission disc 9, so as to move the upper mounting plate 3 and the compression disc 4 up and down reciprocatingly through the guide column 11. The spring vertically placed between the fixed disc 2 and the compression disc 4 is subjected to the fatigue test. After the test is completed, the distance between the top surface of the spring and the bottom surface of the compression disc 4 is observed. The greater the distance is, the worse the fatigue resistance performance of the spring is, and vice versa.

[0045] The above is only the preferred embodiment of the application, and the utility model is not limited to the above embodiments. It can be understood that other improvements and changes directly derived or thought of by those skilled in the art without departing from the spirit and concept of the utility model should be considered to be included in the protection scope of the utility model.

Claims

1. A spring fatigue testing device, characterized in that: include: A frame (1), wherein a fixed plate (2) is provided on the frame (1), a pressure plate (4) is provided directly above the fixed plate (2), a guide column (11) is vertically slidably mounted on the frame (1), an upper mounting plate (3) and a lower mounting plate (5) are fixed to the upper and lower ends of the guide column (11), and the pressure plate (4) is mounted below the upper mounting plate (3); A driving assembly, used for driving the lower mounting plate (5) to move reciprocatingly up and down; A positioning structure for positioning the spring is provided between the fixed plate (2) and the pressure plate (4).

2. A spring fatigue testing device according to claim 1, characterized in that: The positioning structure comprises a positioning column (18), the positioning column (18) being vertically mounted on the top end of the fixed plate (2), and a sliding hole (401) for the positioning column (18) to slide through being provided on the pressure plate (4).

3. A spring fatigue testing device according to claim 2, characterized in that: There are a plurality of positioning posts (18) provided, and the plurality of positioning posts (18) are evenly distributed on the top end of the fixed plate (2), and there are a plurality of corresponding sliding holes (401).

4. A spring fatigue testing device according to claim 3, characterized in that: The diameters of the plurality of positioning posts (18) are different.

5. A spring fatigue testing device according to claim 3 or 4, characterized in that: A stud (19) is provided at the bottom end of the positioning column (18), and a screw hole (201) that matches the stud (19) is provided on the fixing plate (2).

6. A spring fatigue testing device according to claim 1, characterized in that: The driving assembly comprises a driving motor (6), a driving pulley (7), two driving belts (8), a driving disc (9) and a connecting rod (10); The driving motor (6) and the transmission disc (9) are both installed on the inner side of the frame (1); the two transmission pulleys (7) are coaxially connected to the output end of the driving motor (6) and the transmission disc (9), respectively; the transmission belt (8) is sleeved on the two transmission pulleys (7); the bottom end of the connecting rod (10) is rotatably connected to a non-center position of the transmission disc (9); and the top end of the connecting rod (10) is rotatably connected to the lower mounting plate (5).

7. A spring fatigue testing device according to claim 6, characterized in that: A first adjustment component for adjusting the movement range of the lower mounting plate (5) is provided between the transmission disc (9) and the connecting rod (10).

8. The spring fatigue testing device according to claim 7, characterized in that: The first adjustment assembly comprises a mounting block (15), a limiting slider (16) and a first adjustment screw (17); The mounting block (15) is rotatably mounted on the bottom end of the connecting rod (10), the limiting slider (16) is connected to the mounting block (15), and the limiting slider (16) is slidably mounted on the transmission disk (9), and the first adjusting screw (17) is rotatably mounted on the transmission disk (9) and is threadedly penetrated by the limiting slider (16).

9. The spring fatigue testing device according to claim 1, characterized in that: A second adjustment component for adjusting the height of the pressure plate (4) is provided between the pressure plate (4) and the upper mounting plate (3).

10. The spring fatigue testing device according to claim 9, characterized in that: The second adjustment component comprises a limiting sliding sleeve (12), a limiting sliding post (13) and a second adjustment screw (14); The limiting sleeve (12) is vertically fixed on the upper mounting plate (3), one end of the limiting slide (13) is slidably arranged in the limiting sleeve (12), the bottom end of the limiting slide (13) is connected to the pressure plate (4), the second adjusting screw (14) is rotatably installed with the top end of the limiting sleeve (12), the bottom end of the second adjusting screw (14) is passed through the limiting slide (13) and is threadedly connected to the limiting slide (13).

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