Fatigue life testing device for rod-shaped notched piece

Abstract

The utility model discloses a fatigue life testing device for a rod-shaped notched member, which relates to the technical field of life testing, and comprises a shell, a pressure component for testing the pressure of the notched member is arranged in the shell, and a humidity component for testing the humidity of the notched member is also arranged in the shell. A clamping assembly used for clamping the notch piece is arranged at the inner bottom of the shell, and an observation assembly used for observing the interior of the shell is arranged on one face of the shell. The pressure assembly comprises a hydraulic oil cylinder fixedly installed at the top of the shell, a lifting plate is fixedly installed at the output end of the hydraulic oil cylinder, a sliding rod is slidably connected into the lifting plate, a pressure sensor is fixedly installed at the bottom of the lifting plate, and a pressing plate is fixedly installed at the bottom of the pressure sensor. The lifting plate is driven by the hydraulic oil cylinder, the sliding rod is used for limiting, the pressure sensor is driven by the lifting plate, and the pressure gauge is driven by the pressure sensor, so that the pressure test on the notch part is realized.

Description

Technical Field

[0001] This utility model relates to the field of life testing technology, specifically a fatigue life testing device for a rod-shaped notched component. Background Technology

[0002] In engineering design and materials science, fatigue life testing is a crucial step in evaluating the performance of materials or structures under repeated loading conditions. Fatigue life testing is particularly important for notched rods, as the presence of notches significantly affects stress concentration and fatigue behavior, typically by assessing their compressive strength.

[0003] In the prior art, a fatigue life testing device for vehicle fasteners, with publication number CN212844387U, includes: a cabinet, a rotating joint, a hydraulic push rod, a slide, a control panel, and a display screen. The rear wall of the cabinet has a door, and the middle of the front wall has a fixing bolt. A rotating joint is installed at the top of the cabinet's exterior, a support rod is installed at the top of the rotating joint, and a fixing plate is installed at the top of the support rod. Hydraulic push rods are installed at the bottom of the fixing plate and on the upper half of the left and right side walls of the cabinet's exterior. This fatigue life testing device for vehicle fasteners can not only apply pressure to vehicle fasteners in multiple directions and sense and display the real-time pressure information of the vehicle fasteners through pressure sensors to assist users in observation, but also prevent flying fragments when vehicle fasteners are damaged, thus improving safety performance.

[0004] While this device can effectively test the fatigue life of vehicle fasteners, it does not fully meet the requirements for testing rod-shaped notched parts. When the tested rod-shaped notched parts are subjected to direct and strong pressure, it is not convenient to provide cushioning protection for the pressure plate.

[0005] Based on this, a fatigue life testing device for rod-shaped notched parts is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0006] The purpose of this invention is to provide a fatigue life testing device for rod-shaped notched components to solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A fatigue life testing device for a rod-shaped notched component includes a housing, a pressure component for pressure testing of the notched component is provided inside the housing, a humidity component for humidity testing of the notched component is also provided inside the housing, a clamping component for clamping the notched component is provided at the bottom inner part of the housing, and an observation component for observing the interior of the housing is provided on one side of the housing.

[0009] The clamping assembly includes a motor fixedly mounted on one side of the housing, the outer wall of the motor being fitted with a motor protective shell, and the motor protective shell being fixedly connected to the housing;

[0010] The observation assembly includes an observation door that is rotatably mounted on one side of the housing;

[0011] The pressure assembly includes a hydraulic cylinder fixedly installed on the top of the housing, a lifting plate fixedly installed at the output end of the hydraulic cylinder, a sliding rod slidably connected inside the lifting plate, a pressure sensor fixedly installed at the bottom of the lifting plate, and a pressing plate fixedly installed at the bottom of the pressure sensor.

[0012] The humidity component includes a humidifier that is fixedly installed at the bottom of the lifting plate.

[0013] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0014] In one alternative: four support legs are fixedly installed at the bottom of the housing, and are evenly installed around the bottom of the housing.

[0015] In one alternative: a humidity sensor is fixedly installed on the inner wall of the housing, and a control panel is fixedly installed on the outer wall of the housing.

[0016] In one alternative: a shock-absorbing spring is sleeved on the outer wall of the slide rod, one end of the shock-absorbing spring is fixedly connected to the inner top of the outer shell, and a damper is installed inside the shock-absorbing spring.

[0017] In one alternative: the output end of the motor is fixedly connected to a bidirectional lead screw, the outer wall of the bidirectional lead screw is threadedly connected to a clamping plate, and the side away from the bidirectional lead screw is slidably connected to the lead screw inside the clamping plate. The two ends of the lead screw are fixedly connected to the inner side wall of the housing, and a groove is provided in the middle of one side of the clamping plate.

[0018] In one alternative: a hinge is rotatably connected to one side of the observation door, a handle is fixedly connected to one side of the observation door, and an observation window is fixedly installed in the middle of the observation door.

[0019] In one alternative: the humidifier has an internal threaded connection with a threaded cap, and the number of threaded caps and humidifiers is two, symmetrically installed along the center line of the lifting plate.

[0020] In one alternative: the two ends of the bidirectional lead screw are cylindrical.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. This utility model uses a hydraulic cylinder to drive a lifting plate, which in turn drives a pressure sensor. A sliding rod limits the lifting plate, and the pressure sensor drives a pressing plate. A shock-absorbing spring buffers the force generated when the lifting plate moves upward, thus achieving the detection of the compressive strength of a rod-shaped notch component.

[0023] 2. This utility model uses a motor to drive a bidirectional lead screw, which in turn drives a clamping plate. The lead screw limits the position of the clamping plate, and the groove clamps the rod-shaped notched part. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the three-dimensional installation structure of this utility model.

[0025] Figure 2 This is a schematic diagram of the internal installation structure of this utility model.

[0026] Figure 3 This is a schematic diagram of the controller installation structure of this utility model.

[0027] Figure 4 This is a cross-sectional installation structure diagram of the present invention.

[0028] Figure label annotations:

[0029] 1. Outer shell;

[0030] 2. Pressure components; 201. Hydraulic cylinder; 202. Lifting plate; 203. Shock-absorbing spring; 204. Slide rod; 205. Pressure sensor; 206. Pressing plate;

[0031] 3. Observe the components; 301. Observe the door; 302. Hinges; 303. Handles; 304. Observation window;

[0032] 4. Clamping assembly; 401. Motor protective housing; 402. Motor; 403. Two-way lead screw; 404. Lead screw; 405. Groove; 406. Clamping plate;

[0033] 5. Support legs; 6. Humidity sensor;

[0034] 7. Humidity component; 701. Threaded cap; 702. Humidifier;

[0035] 8. Control Panel. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] In one embodiment, such as Figures 1-4As shown, a fatigue life testing device for a rod-shaped notched component includes a housing 1. Inside the housing 1, there is a pressure component 2 for pressure testing of the notched component. Inside the housing 1, there is also a humidity component 7 for humidity testing of the notched component. At the bottom inside the housing 1, there is a clamping component 4 for clamping the notched component. On one side of the housing 1, there is an observation component 3 for observing the inside of the housing 1.

[0038] In one embodiment, such as Figure 3 As shown, the pressure assembly 2 includes a hydraulic cylinder 201 fixedly installed on the top of the housing 1. A lifting plate 202 is fixedly installed at the output end of the hydraulic cylinder 201. A slide rod 204 is slidably connected inside the lifting plate 202. A pressure sensor 205 is fixedly installed at the bottom of the lifting plate 202. A pressing plate 206 is fixedly installed at the bottom of the pressure sensor 205. The lifting plate 202 is driven by the hydraulic cylinder 201, and the lifting plate 202 is limited by the slide rod 204. The lifting plate 202 drives the pressure sensor 205, and the pressure sensor 205 drives the pressing plate 206, effectively testing the pressure of the rod-shaped notch.

[0039] A shock-absorbing spring 203 is sleeved on the outer wall of the slide bar 204. One end of the shock-absorbing spring 203 is fixedly connected to the inner top of the outer shell 1. A damper is installed inside the shock-absorbing spring 203. The shock-absorbing spring 203 and the damper work together to effectively buffer the force generated when the lifting plate 202 rises, thereby increasing its service life.

[0040] In one embodiment, such as Figure 1 As shown, the observation assembly 3 includes an observation door 301 rotatably mounted on one side of the housing 1; a hinge 302 is rotatably connected to one side of the observation door 301, a handle 303 is fixedly connected to one side of the observation door 301, and an observation window 304 is fixedly installed in the middle of the observation door 301; by pulling the handle 303, the observation door 301 is driven, and the four hinges 302 cause the observation door 301 to rotate; through the observation window 304, the missing parts in the working process can be better observed.

[0041] In one embodiment, such as Figure 2As shown, the clamping assembly 4 includes a motor 402 fixedly installed on one side of the housing 1. The outer wall of the motor 402 is fitted with a motor protective shell 401, and the motor protective shell 401 is fixedly connected to the housing 1. A bidirectional lead screw 403 is fixedly connected to the output end of the motor 402. A clamping plate 406 is threadedly connected to the outer wall of the bidirectional lead screw 403. A lead screw 404 is slidably connected inside the clamping plate 406 on the side away from the bidirectional lead screw 403. The two ends of the lead screw 404 are fixedly connected to the inner side wall of the housing 1. A groove 405 is provided in the middle of one side of the clamping plate 406. The motor 402 drives the bidirectional lead screw 403, which in turn drives the clamping plate 406. The lead screw 403 limits the clamping plate 406, effectively clamping rod-shaped notches of different sizes.

[0042] The two ends of the bidirectional lead screw 403 are cylindrical; the cylindrical shape at both ends of the bidirectional lead screw 403 can effectively limit the position of the clamping plate 406.

[0043] In one embodiment, such as Figure 4 As shown, the humidity component 7 includes a humidifier 702 fixedly installed at the bottom of the lifting plate 202; the humidifier 702 can effectively regulate the humidity inside the outer casing 1 and perform humidity testing on the rod-shaped notch.

[0044] The humidifier 702 has a threaded cover 701 inside, and the number of threaded covers 701 and humidifiers 702 is two, symmetrically installed on the center line of the lifting plate 202; the humidifier 702 can be opened by rotating the threaded cover 701, so as to add water to the humidifier in time and control the humidity.

[0045] In one embodiment, such as Figure 1 and Figure 3 As shown, four support legs 5 are fixedly installed at the bottom of the outer shell 1, and are evenly installed around the bottom of the outer shell 1. The four support legs 5 can effectively support the outer shell 1 and prevent large-scale shaking during operation.

[0046] A humidity sensor 6 is fixedly installed on the inner wall of the housing 1, and a control panel 8 is fixedly installed on the outer wall of the housing 1. The control panel 8 receives data from the pressure sensor 205 and the humidity sensor 6.

[0047] The above embodiment discloses a fatigue life testing device for a rod-shaped notched component. In use, pulling the handle 303 moves the observation door 301, which rotates via the hinge 302. Simultaneously, the motor 402 is activated, driving the bidirectional lead screw 403, which in turn drives the clamping plate 406. The lead screw 403 limits the clamping plate 406, adjusting its clamping position according to the size of the rod-shaped notched component. Water is injected into the humidifier 702 by rotating the threaded cover 701, and the humidity sensor 6 records the internal humidity. The system receives data in real time, facilitating humidity testing of the rod-shaped notch component. A hydraulic cylinder 201 drives a lifting plate 202, which is limited by a sliding rod 204. The lifting plate 202 drives a pressure sensor 205, which in turn drives a pressing plate 206. The pressure sensor 205 transmits the different pressures exerted on the rod-shaped notch component to the control panel 8 in real time. The shock-absorbing spring 203 and damper work together to buffer the force generated by the lifting plate 202, increasing its service life. Fatigue life testing uses a pressure resistance method to test its compressive strength.

[0048] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A fatigue life testing device for a rod-shaped notched component, characterized in that, Includes a housing (1), inside which is provided a pressure component (2) for pressure testing of the notch, inside which is also provided a humidity component (7) for humidity testing of the notch, at the bottom of the inner part of the housing (1) is provided a clamping component (4) for clamping the notch, and on one side of the housing (1) is provided an observation component (3) for observing the inside of the housing (1). The clamping assembly (4) includes a motor (402) fixedly installed on one side of the outer shell (1), the outer wall of the motor (402) is fitted with a motor protective shell (401), and the motor protective shell (401) is fixedly connected to the outer shell (1); The observation assembly (3) includes an observation door (301) that is rotatably mounted on one side of the housing (1). The pressure assembly (2) includes a hydraulic cylinder (201) fixedly installed on the top of the housing (1), a lifting plate (202) fixedly installed at the output end of the hydraulic cylinder (201), a slide rod (204) slidably connected inside the lifting plate (202), a pressure sensor (205) fixedly installed at the bottom of the lifting plate (202), and a pressing plate (206) fixedly installed at the bottom of the pressure sensor (205). The humidity assembly (7) includes a humidifier (702) fixedly installed at the bottom of the lifting plate (202).

2. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, The bottom of the outer shell (1) is fixedly equipped with four support legs (5), which are evenly installed around the bottom of the outer shell (1).

3. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, A humidity sensor (6) is fixedly installed on the inner wall of the housing (1), and a control panel (8) is fixedly installed on the outer wall of the housing (1).

4. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, A damping spring (203) is sleeved on the outer wall of the slide rod (204). One end of the damping spring (203) is fixedly connected to the inner top of the outer shell (1). A damper is installed inside the damping spring (203).

5. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, The output end of the motor (402) is fixedly connected to a bidirectional lead screw (403). A clamping plate (406) is threadedly connected to the outer wall of the bidirectional lead screw (403). A lead screw (404) is slidably connected inside the clamping plate (406) on the side away from the bidirectional lead screw (403). The two ends of the lead screw (404) are fixedly connected to the inner side wall of the outer shell (1). A groove (405) is provided in the middle of one side of the clamping plate (406).

6. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, A hinge (302) is rotatably connected to one side of the observation door (301), a handle (303) is fixedly connected to one side of the observation door (301), and an observation window (304) is fixedly installed in the middle of the observation door (301).

7. The fatigue life testing device for a rod-shaped notched component according to claim 1, characterized in that, The humidifier (702) has a threaded cap (701) inside, and the number of threaded caps (701) and humidifiers (702) is two, symmetrically installed on the center line of the lifting plate (202).

8. The fatigue life testing device for a rod-shaped notched component according to claim 5, characterized in that, The two ends of the bidirectional lead screw (403) are cylindrical.

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