A high-strength bolted joint fatigue failure test bench

Abstract

This utility model discloses a fatigue failure test bench for high-strength bolt connection nodes, relating to the field of bolt fatigue testing technology. The utility model includes a base plate, with a feeding mechanism for bolt conveying located above the base plate. The feeding mechanism also includes a positioning mechanism to improve accuracy, and a lifting mechanism above the base plate for moving the testing equipment. The feeding mechanism includes a support platform fixedly installed above the base plate, with a rotating rod and a threaded rod rotatably mounted on both sides of the support platform. This application achieves efficient bolt conveying and testing coordination through the feeding mechanism. During operation, the bolt is placed in the groove of the support platform, and the threaded rod drives the moving plate to move, aligning the push plate with the bolt. Then, the rotating rod drives the push plate to rotate, allowing the bolt to pass through the hole. Subsequently, the push plate pushes the bolt to the bottom of the testing equipment. After testing, the bolt can be pushed through a drop trough into a collection box, eliminating the need for frequent manual operation and improving testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of bolt fatigue testing technology, specifically to a fatigue failure test bench for high-strength bolt connection nodes. Background Technology

[0002] High-strength bolts are a type of fastener that has higher tensile strength, yield strength, and fatigue resistance than ordinary bolts. Publication number "CN222364880U" discloses a thread fatigue testing device, including: a fixed frame; a test nut; a motor; and a transmission assembly including a coupling, a transmission rod, a wrench nut, and a rotating head. The coupling is connected to the motor and transmits motor power to the transmission rod and the wrench nut. The wrench nut is fixedly connected to the rotating head, and the rotating head is fixedly connected to the test nut. A bolt is provided, which is coaxially arranged with the test nut in the vertical direction. The thread of the bolt is compatible with the thread of the test nut. A space is provided in the coupling, at least a portion of the transmission rod is disposed within the space, and the coupling and the transmission rod are threadedly rotatably connected. When the motor is working, the transmission rod moves helically relative to the coupling within the space, and the power is transmitted to the rotating head and the test nut via the coupling, the transmission rod, and the wrench nut, thereby causing the test nut to screw the bolt into or out of the bolt to a designated position in the vertical direction. This application's technical solution automates thread fatigue testing. Based on the search of patent numbers and the shortcomings of existing technologies, the following was found: The common fatigue failure testing benches on the market often rely on manual assistance in the bolt loading process. This not only requires staff to repeatedly adjust the bolt position to ensure that it is aligned with the subsequent testing mechanism, but also easily leads to insufficient loading accuracy due to human operation errors, which in turn affects the reliability of the test data. Furthermore, after the test is completed, the bolt collection also requires manual intervention and cannot be automated, which further increases the labor intensity of the staff. Utility Model Content

[0003] To address the issue of excessive reliance on manual assistance in the bolt feeding process, the purpose of this invention is to provide a fatigue failure test bench for high-strength bolt connection nodes.

[0004] To solve the above technical problems, the present invention adopts the following technical solution: a fatigue failure test bench for high-strength bolt connection nodes, including a base plate, a feeding mechanism for bolt conveying is provided above the base plate, a positioning mechanism for improving accuracy is provided inside the feeding mechanism, and a lifting mechanism is provided above the base plate for moving the test equipment. The feeding mechanism includes a support platform fixedly installed above the base plate. Rotating rods and threaded rods are rotatably provided on both sides of the support platform. Ring-shaped locking rods are fixedly installed on the outer side of the rotating rods. A movable tube is movably sleeved on the outer side of the rotating rods. Ring-shaped locking grooves are opened inside the movable tubes. Multiple locking rods pass through the corresponding locking grooves. A movable plate is threadedly sleeved on the outer side of the threaded rods. A limiting groove that cooperates with the push plate is opened at the top of the movable plate.

[0005] Preferably, the positioning mechanism includes two positioning plates fixedly installed with the movable plate, the movable tube is rotatably installed in the two positioning plates, and a slot is opened at the bottom of the support platform, with both positioning plates passing through the slot.

[0006] Preferably, the lifting mechanism includes a bracket fixedly connected to the base plate, a movable plate slidably mounted on the top of the bracket, a testing device provided in the middle of the movable plate, a fixed plate fixedly mounted on one side of the bracket, an electric push rod fixedly mounted on the top of the fixed plate, and the output end of the electric push rod fixedly connected to the movable plate.

[0007] Preferably, connecting plates are fixedly installed on both sides of the support platform, and the rotating rod and the threaded rod respectively rotate through the corresponding connecting plates.

[0008] Preferably, a drop groove is provided on the lower surface of the inner wall of the support platform, and a collection box that works in conjunction with the drop groove is detachably installed on one side of the bottom end of the base plate.

[0009] Preferably, a first motor and a second motor are coaxially fixedly mounted at one end of the threaded rod and the rotating rod, respectively, to provide power to the threaded rod and the rotating rod.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This application enables efficient bolt feeding and testing coordination through a feeding mechanism. During operation, the bolt is placed in the groove of the support platform, and the threaded rod drives the moving plate to move, aligning the push plate with the bolt. Then, the rotating rod drives the push plate to rotate, allowing the bolt to pass through the hole. Subsequently, the push plate pushes the bolt to the bottom of the testing equipment. After testing, the bolt can be pushed through the drop trough into the collection box, eliminating the need for frequent manual operation and improving testing efficiency. 2. This application improves the accuracy of bolt delivery and testing through a positioning mechanism. When the moving plate moves, the positioning plate drives the movable tube to move synchronously, ensuring that the push plate can be accurately aligned with the bolt during the movement of the push plate driven by the movable tube. This allows the bolt to stably pass through the hole in the push plate, and the subsequent push plate pushes the bolt to accurately reach the bottom of the testing equipment, ensuring smooth testing and reducing the impact of positional deviations. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the disassembled feeding mechanism in this utility model.

[0014] Figure 3 This is a schematic diagram of the positioning mechanism in this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the collection box in this utility model.

[0016] In the diagram: 101, base plate; 1, feeding mechanism; 2, positioning mechanism; 3, lifting mechanism; 11, support platform; 12, rotating rod; 13, locking rod; 14, movable tube; 15, locking groove; 16, push plate; 17, threaded rod; 18, moving plate; 19, limiting groove; 21, positioning plate; 22, empty groove; 31, bracket; 32, movable plate; 33, testing equipment; 34, fixed plate; 35, electric push rod; 41, connecting plate; 51, drop groove; 52, collection box; 61, first motor; 62, second motor. Detailed Implementation

[0017] 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.

[0018] like Figure 1-4 As shown, this utility model discloses a fatigue failure test bench for high-strength bolted joints and provides the following two embodiments: Example 1: A fatigue failure test bench for high-strength bolt connection nodes includes a base plate 101, a feeding mechanism 1 for bolt feeding is provided above the base plate 101, a positioning mechanism 2 for improving accuracy is provided inside the feeding mechanism 1, and a lifting mechanism 3 is provided above the base plate 101 for moving the test equipment 33. The feeding mechanism 1 includes a support platform 11 fixedly installed above the base plate 101. A rotating rod 12 and a threaded rod 17 are rotatably provided on both sides of the support platform 11. A ring-shaped distribution of locking rods 13 is fixedly installed on the outer side of the rotating rod 12. A movable tube 14 is movably sleeved on the outer side of the rotating rod 12. A ring-shaped distribution of locking grooves 15 is opened inside the movable tube 14. Multiple locking rods 13 pass through the corresponding locking grooves 15. A movable plate 18 is threadedly sleeved on the outer side of the threaded rod 17. A limiting groove 19 that cooperates with the push plate 16 is opened at the top of the movable plate 18.

[0019] Example 2 differs from Example 1 in that: the positioning mechanism 2 includes two positioning plates 21 fixedly installed with the movable plate 18, the movable tube 14 is rotatably installed in the two positioning plates 21, and the bottom of the support platform 11 is provided with a slot 22, through which both positioning plates 21 pass.

[0020] The lifting mechanism 3 includes a bracket 31 fixedly connected to the base plate 101. A movable plate 32 is slidably installed on the top of the bracket 31. A testing device 33 is provided in the middle of the movable plate 32. A fixed plate 34 is fixedly installed on one side of the bracket 31. An electric push rod 35 is fixedly installed on the top of the fixed plate 34. The output end of the electric push rod 35 is fixedly connected to the movable plate 32. By setting the lifting mechanism 3, the lifting of the testing device 33 is realized, so that the bolt can enter the testing device 33. At the same time, the bolt can be avoided from being blocked, so that the bolt can smoothly come to the bottom of the testing device 33.

[0021] Connecting plates 41 are fixedly installed on both sides of the support platform 11. The rotating rod 12 and the threaded rod 17 rotate through the corresponding connecting plates 41. By setting the connecting plates 41, the rotating rod 12 and the threaded rod 17 can be supported and rotated smoothly.

[0022] The lower inner wall of the support platform 11 is provided with a drop groove 51. A collection box 52 that works with the drop groove 51 is detachably installed on one side of the bottom end of the base plate 101. By setting the drop groove 51 and the collection box 52, the bolts can enter the collection box 52 through the drop groove 51, making it convenient for workers to collect them.

[0023] A first motor 61 and a second motor 62 are coaxially fixed at one end of the threaded rod 17 and the rotating rod 12, respectively, to provide power to the threaded rod 17 and the rotating rod 12.

[0024] Working principle: In actual use, the bolts to be tested are placed sequentially in the grooves inside the support platform 11. The threaded rod 17 is rotated, causing it to move the movable plate 18. The movable plate 18, through the positioning plate 21, moves the movable tube 14 and the push plate 16 until the push plate 16 and the bolts are on the same horizontal line. Then, the rotating rod 12 is rotated, causing the locking rod 13 to rotate. The locking rod 13, through the locking groove 15, drives the movable tube 14 to rotate. At this time, the movable tube 14 drives the push plate 16 to rotate towards the movable plate 18. The movement causes the bolt to pass through the hole inside the push plate 16, and one end of the push plate 16 enters the limiting groove 19. Then, the threaded rod 17 is driven to rotate, causing the push plate 16 to push the bolt to the bottom of the testing device 33. At this time, the electric push rod 35 is activated, causing its output end to descend, which drives the movable plate 32 and the testing device 33 to descend until the bolt enters the testing device 33. After the test is completed, the threaded rod 17 is driven to move the push plate 16 and the bolt until the bolt falls through the drop groove 51 into the collection box 52 for easy collection by the staff.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A fatigue failure test bench for high-strength bolted joints, comprising a base plate (101), characterized in that: The base plate (101) is provided with a feeding mechanism (1) for conveying bolts. The feeding mechanism (1) is provided with a positioning mechanism (2) to improve accuracy. The base plate (101) is provided with a lifting mechanism (3) for moving the testing equipment (33). The feeding mechanism (1) includes a support platform (11) fixedly installed above the base plate (101). A rotating rod (12) and a threaded rod (17) are respectively rotatably provided on both sides of the support platform (11). A ring-shaped clamping rod (13) is fixedly installed on the outer side of the rotating rod (12). A movable tube (14) is movably sleeved on the outer side of the rotating rod (12). A ring-shaped clamping groove (15) is opened inside the movable tube (14). Multiple clamping rods (13) pass through the corresponding clamping grooves (15). A movable plate (18) is threaded on the outer side of the threaded rod (17). A limiting groove (19) is opened at the top of the movable plate (18) to cooperate with the push plate (16).

2. The fatigue failure test bench for high-strength bolted joints as described in claim 1, characterized in that, The positioning mechanism (2) includes two positioning plates (21) fixedly installed with the movable plate (18). The movable tube (14) is rotatably installed in the two positioning plates (21). The bottom of the support platform (11) is provided with a slot (22). Both positioning plates (21) pass through the slot (22).

3. The fatigue failure test bench for high-strength bolted joints as described in claim 1, characterized in that, The lifting mechanism (3) includes a bracket (31) fixedly connected to the base plate (101). A movable plate (32) is slidably installed on the top of the bracket (31). A testing device (33) is provided in the middle of the movable plate (32). A fixed plate (34) is fixedly installed on one side of the bracket (31). An electric push rod (35) is fixedly installed on the top of the fixed plate (34). The output end of the electric push rod (35) is fixedly connected to the movable plate (32).

4. The fatigue failure test bench for high-strength bolted joints as described in claim 2, characterized in that, Connecting plates (41) are fixedly installed on both sides of the support platform (11), and the rotating rod (12) and the threaded rod (17) respectively rotate through the corresponding connecting plates (41).

5. The fatigue failure test bench for high-strength bolted joints as described in claim 4, characterized in that, The lower inner wall of the support platform (11) is provided with a drop groove (51), and a collection box (52) that works with the drop groove (51) can be detachably installed on one side of the bottom end of the base plate (101).

6. The fatigue failure test bench for high-strength bolted joints as described in claim 5, characterized in that, The threaded rod (17) and the rotating rod (12) are respectively coaxially fixedly mounted with a first motor (61) and a second motor (62) to provide power to the threaded rod (17) and the rotating rod (12).

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