A spring fatigue testing device

Abstract

The utility model discloses a spring fatigue testing arrangement, including spring life testing machine, spring life testing machine includes base, fixed frame, movable frame, outer tube and inner tube, the fixed frame is fixed at base top one end, and movable frame swing connection is in base top, and is located fixed frame side, outer tube and inner tube share four groups, and two groups are fixed respectively on fixed frame and movable frame, limiting component, limiting component includes first aperture, second aperture, T type plug -in block and arc -shaped groove, first aperture is set up in outer tube upper end, and second aperture is set up in inner tube upper end, and second aperture is located first aperture directly below, and T type plug -in block is inserted in first aperture and second aperture, and arc -shaped groove sets up in T type plug -in block lower extreme. The utility model discloses through being provided with limiting component, in addition to locking screw, the T type plug -in block is additionally added to the both ends of spring, to play the limiting effect, and the both ends of spring are increased the connection intensity.

Description

Technical Field

[0001] This utility model relates to the field of spring fatigue testing technology, specifically a spring fatigue testing device. Background Technology

[0002] A spring fatigue testing device (also known as a spring fatigue testing machine) is a specialized piece of equipment used to verify the durability, fatigue life, and reliability of spring products by simulating cyclic loads under actual working conditions. The main types include: reciprocating spring fatigue testing machines, torsional spring fatigue testing machines, planar spring fatigue testing devices, leaf spring fatigue testing devices, and impact spring fatigue testing devices. Reciprocating spring fatigue testing machines are suitable for vertical reciprocating fatigue testing of components such as helical springs and disc springs, achieving compression / tension motion through a motor-cam-linkage mechanism. One existing desktop spring life testing machine has the spring's two ends respectively fitted onto the inner cylinders of a fixed frame and a movable frame, secured by locking screws screwed onto the outer cylinder.

[0003] This fixing method, which uses locking screws to secure both ends of the spring, suffers from a problem due to the spring's curved outer surface and the small contact area between the screws and the spring. This can lead to slippage and loosening after prolonged reciprocating motion, affecting test results. Therefore, a spring fatigue testing device is needed to address this issue. Utility Model Content

[0004] The purpose of this utility model is to provide a spring fatigue testing device to solve the problems mentioned in the background art. To solve the above technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model is a spring fatigue testing device, comprising:

[0006] A spring life testing machine includes a base, a fixed frame, a movable frame, an outer cylinder, and an inner cylinder. The fixed frame is fixed to one end of the base, and the movable frame is movably connected to the upper end of the base and located on the side of the fixed frame. There are four sets of outer and inner cylinders, with two sets fixed on the fixed frame and the movable frame respectively.

[0007] A limiting component, comprising a first opening, a second opening, a T-shaped insert, and an arc-shaped groove; the first opening is located at the upper end of the outer cylinder, the second opening is located at the upper end of the inner cylinder and is directly below the first opening, the T-shaped insert is inserted into the first opening and the second opening, and the arc-shaped groove is located at the lower end of the T-shaped insert.

[0008] Furthermore, the limiting component also includes a threaded groove and a T-shaped pull rod. The threaded groove is formed in the middle of the upper end of the T-shaped insert, and the lower end of the T-shaped pull rod is screwed into the threaded groove.

[0009] Furthermore, the limiting component also includes a rubber pad, which is fixed in the arc-shaped groove.

[0010] Furthermore, the limiting component also includes a slot, which is formed on the side of the outer cylinder.

[0011] Furthermore, the spring life testing machine also includes a turntable and a support block, the turntable being rotatably connected to the upper end of the base, and the support block being fixed above one end of the turntable.

[0012] Furthermore, the support block and the movable frame are movably connected by a connecting rod, and a round bar is inserted between the inner cylinder of the movable frame and the fixed frame.

[0013] Furthermore, it also includes a balancing assembly, which includes a threaded hole, an adjusting rod, a counterweight, and a fastening nut. The threaded hole is located in the middle of the side of the support block. One end of the adjusting rod is screwed into the threaded hole, the counterweight is sleeved on one end of the adjusting rod, and the fastening nut is screwed into the middle of the adjusting rod.

[0014] Furthermore, the balancing assembly also includes a through hole, which is located in the middle of the counterweight, and the adjusting rod is inserted into the through hole.

[0015] This utility model has the following beneficial effects:

[0016] This utility model, through the setting of a limiting component, allows one hand to pull the T-shaped lever, causing the T-shaped insert to move upward along the first and second openings, while the other hand to put one end of the spring onto the inner cylinder. By observing the spring position through the slot, the T-shaped insert is released, and the rubber pad under the arc groove falls, passes through the spring, and falls into the second opening. Then, the locking screw on the outer cylinder is tightened. This setting, in addition to using the locking screw, adds T-shaped inserts to both ends of the spring to play a limiting role and increase the connection strength between the two ends of the spring. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the position of the limiting component of this utility model;

[0020] Figure 3 This is a schematic diagram showing the positions of the slot, the first opening, and the second opening of this utility model;

[0021] Figure 4 This is a schematic diagram of the T-shaped insert and T-shaped tie rod structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the counterweight structure of this utility model;

[0023] Figure 6 This is a schematic diagram of the support block structure of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 10. Base; 11. Turntable; 12. Support block; 13. Fixed frame; 14. Movable frame; 15. Outer cylinder; 16. Inner cylinder; 20. Slot; 21. First opening; 22. Second opening; 23. T-shaped insert; 24. Threaded groove; 25. T-shaped tie rod; 26. Arc groove; 27. Rubber pad; 30. Threaded hole; 31. Adjusting rod; 32. Fastening nut; 33. Counterweight; 34. Through hole. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0028] Please see Figure 1-4 As shown, this utility model is a spring fatigue testing device, comprising:

[0029] The spring life testing machine includes a base 10, a fixed frame 13, a movable frame 14, an outer cylinder 15, and an inner cylinder 16. The fixed frame 13 is fixed at one end above the base 10, and the movable frame 14 is movably connected to the upper end of the base 10 and located on the side of the fixed frame 13. There are four sets of outer cylinders 15 and inner cylinders 16, and two sets are fixed on the fixed frame 13 and the movable frame 14 respectively.

[0030] The spring life testing machine also includes a turntable 11 and a support block 12. The turntable 11 is rotatably connected to the upper end of the base 10, and the support block 12 is fixed to one end above the turntable 11.

[0031] The support block 12 is movably connected to the movable frame 14 by a connecting rod, and a round bar is inserted between the inner cylinder 16 on the movable frame 14 and the fixed frame 13.

[0032] The base 10 provides support and houses a motor to control the rotation of the turntable 11. The turntable 11 also provides support and is used to fix the support block 12. A support rod is mounted on the support block 12 to connect the connecting rod. The fixing frame 13 fixes one end of the spring, and the movable frame 14 fixes the other end of the spring. The outer cylinder 15 provides support and is used to support the locking screw, while the inner cylinder 16 supports the spring. Test parameters, such as loading frequency and stress amplitude, can be set through the motor control program. The number of tests and cycles are directly displayed by the counting system on the base 10. If the spring does not break, undergo plastic deformation, or loosen, it passes the test. If any of these problems occur, the fatigue life is deemed insufficient.

[0033] The limiting component includes a first opening 21, a second opening 22, a T-shaped insert 23, and an arc-shaped groove 26. The first opening 21 is opened at the upper end of the outer cylinder 15, the second opening 22 is opened at the upper end of the inner cylinder 16, and the second opening 22 is located directly below the first opening 21. The T-shaped insert 23 is inserted into the first opening 21 and the second opening 22, and the arc-shaped groove 26 is opened at the lower end of the T-shaped insert 23.

[0034] The limiting assembly also includes a threaded groove 24 and a T-shaped tie rod 25. The threaded groove 24 is opened in the middle of the upper end of the T-shaped insert 23, and the lower end of the T-shaped tie rod 25 is screwed into the threaded groove 24.

[0035] The limiting component also includes a rubber pad 27, which is fixed in the arc-shaped groove 26;

[0036] The limiting component also includes a slot 20, which is formed on the side of the outer cylinder 15;

[0037] The slot 20 facilitates observation of the spring position in the outer cylinder 15. The first opening 21 and the second opening 22 provide a moving channel for the T-shaped insert 23 and also serve as a limit. The T-shaped insert 23 serves as a limit. The threaded groove 24 serves as a connection. The T-shaped pull rod 25 facilitates hand movement of the T-shaped insert 23. The arc groove 26 facilitates the T-shaped insert 23 to fit against the round bar in the inner cylinder 16. The rubber pad 27 prevents friction against the round bar.

[0038] Working principle:

[0039] Screw the lower end of the T-shaped pull rod 25 into the threaded groove 24. Pull the T-shaped pull rod 25 with one hand, causing the T-shaped insert 23 to move upward along the first opening 21 and the second opening 22. With the other hand, put one end of the spring onto the inner cylinder 16. Observe the position of the spring through the slot 20. Release the T-shaped insert 23, and the rubber pad 27 under the arc groove 26 will fall, pass through the spring, and fall into the second opening 22. Then tighten the locking screw on the outer cylinder 15. Insert the round bar into the corresponding two inner cylinders 16 on the fixed frame 13 and the movable frame 14. Start the equipment. The turntable 11 rotates, causing the support block 12 to rotate, which in turn causes the connecting rod to rotate. The connecting rod causes the movable frame 14 to move linearly, which in turn causes one end of the spring to move back and forth. When the spring reciprocates to the set number of cycles, if the spring does not break or plastically deform, the test is passed. If the above problems occur, it is determined that the fatigue life is insufficient.

[0040] In this step, in addition to using the locking screw, T-shaped inserts 23 are added to both ends of the spring to limit the movement and increase the connection strength between the two ends of the spring.

[0041] Please see Figure 1 , Figure 5-6 As shown, this embodiment, based on the above embodiment, further includes:

[0042] The balancing assembly includes a threaded hole 30, an adjusting rod 31, a counterweight 33, and a fastening nut 32. The threaded hole 30 is located in the middle of the side of the support block 12. One end of the adjusting rod 31 is screwed into the threaded hole 30. The counterweight 33 is sleeved on one end of the adjusting rod 31. The fastening nut 32 is screwed into the middle of the adjusting rod 31.

[0043] The balancing assembly also includes a through hole 34, which is located in the middle of the counterweight 33, and the adjusting rod 31 is inserted into the through hole 34.

[0044] The threaded hole 30 and the adjusting rod 31 serve to connect and adjust, the fastening nut 32 serves to fix, the counterweight 33 serves to balance, and the through hole 34 facilitates the connection of the counterweight 33.

[0045] Working principle:

[0046] After installing the spring, move the position of the support block 12 and fix it with screws. Put the counterweight block 33 onto the adjusting rod 31 through the through hole 34 and tighten the fastening nut 32. Then screw the adjusting rod 31 into the threaded hole 30 and adjust the position of the counterweight block 33 so that the counterweight block 33 and the support block 12 are as symmetrical as possible.

[0047] This step improves the balance at both ends of the turntable 11 and reduces the wear at the bearing connection when the turntable 11 rotates.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A spring fatigue testing device, characterized in that, include: A spring life testing machine includes a base (10), a fixed frame (13), a movable frame (14), an outer cylinder (15), and an inner cylinder (16). The fixed frame (13) is fixed at one end above the base (10), and the movable frame (14) is movably connected to the upper end of the base (10) and located on the side of the fixed frame (13). There are four sets of outer cylinder (15) and inner cylinder (16), and two sets are fixed on the fixed frame (13) and the movable frame (14) respectively. The limiting component includes a first opening (21), a second opening (22), a T-shaped insert (23), and an arc-shaped groove (26); the first opening (21) is opened at the upper end of the outer cylinder (15), the second opening (22) is opened at the upper end of the inner cylinder (16), and the second opening (22) is located directly below the first opening (21); the T-shaped insert (23) is inserted into the first opening (21) and the second opening (22); and the arc-shaped groove (26) is opened at the lower end of the T-shaped insert (23).

2. The spring fatigue testing device according to claim 1, characterized in that: The limiting component also includes a threaded groove (24) and a T-shaped pull rod (25). The threaded groove (24) is opened in the middle of the upper end of the T-shaped insert (23), and the lower end of the T-shaped pull rod (25) is screwed into the threaded groove (24).

3. The spring fatigue testing device according to claim 1, characterized in that: The limiting component also includes a rubber pad (27), which is fixed in the arc-shaped groove (26).

4. The spring fatigue testing device according to claim 1, characterized in that: The limiting component also includes a slot (20), which is formed on the side of the outer cylinder (15).

5. A spring fatigue testing device according to claim 1, characterized in that: The spring life testing machine also includes a turntable (11) and a support block (12). The turntable (11) is rotatably connected to the upper end of the base (10), and the support block (12) is fixed above one end of the turntable (11).

6. The spring fatigue testing device according to claim 5, characterized in that: The support block (12) and the movable frame (14) are movably connected by a connecting rod, and a round bar is inserted between the inner cylinder (16) on the movable frame (14) and the fixed frame (13).

7. A spring fatigue testing device according to claim 5, characterized in that: It also includes a balancing component, which includes a threaded hole (30), an adjusting rod (31), a counterweight (33), and a fastening nut (32). The threaded hole (30) is located in the middle of the side of the support block (12). One end of the adjusting rod (31) is screwed into the threaded hole (30). The counterweight (33) is sleeved on one end of the adjusting rod (31). The fastening nut (32) is screwed into the middle of the adjusting rod (31).

8. A spring fatigue testing device according to claim 7, characterized in that: The balancing assembly also includes a through hole (34), which is located in the middle of the counterweight (33), and the adjusting rod (31) is inserted into the through hole (34).

Images