CN220854508U - Fatigue-resistant experimental device - Google Patents

Abstract

The utility model discloses a fatigue resistance experiment device, which relates to the field of spring fatigue resistance detection and comprises a workbench, a detection spring, a control cam, a sliding mounting table for mounting the detection spring, a fixed mounting table and an anti-deflection mechanism, wherein the control cam is rotatably mounted on the upper end surface of the workbench; through the cooperation of above-mentioned structure, can prevent to detect the radial transition bending deformation of spring to improve the accuracy of experiment.

Description

A fatigue resistance test device

Technical Field

The utility model relates to the technical field of spring fatigue detection, in particular to a fatigue resistance experimental device.

Background technique

Springs play a vital role in engineering mechanics. They are mechanical parts that use elasticity to work. Parts made of elastic materials deform under the action of external forces and return to their original shape after the external forces are removed. Therefore, fatigue tests need to be carried out on springs of different batches.

For example, Chinese patent: Publication No. CN216483915U is a fatigue resistance experimental device for engineering mechanics, including a support seat and a servo motor, a servo motor is fixed on the upper left side of the support seat, a placement plate is fixed on the right side of the support seat, a protective cover is nested on the right side of the placement plate, the output end on the right side of the servo motor is connected to a rotating plate through a transmission shaft, an inner plate is fixed on the outer wall of the rotating plate, an outer plate is nested on the outer side of the inner plate, an extension groove is provided in the inner opening of the placement plate, a limiting hole is provided in the right opening of the placement plate, an external fixing block and an internal fixing block are embedded in the extension groove, a limiting bolt is inserted in the outer wall of the external fixing block, and a fixing plate is fixed at one end of the external fixing block and the internal fixing block. The utility model can perform fatigue tests on multiple springs at the same time, greatly improving the test efficiency of spring fatigue tests, making the test results more accurate by taking the average value, and can test springs of various specifications, making it more convenient to use.

Although the method of taking the average value can make the test results more accurate and can be used to test springs of various specifications, making it more convenient to use, during actual use, the staff found that due to the two fixing plates at both ends of the spring, when the spring is squeezed, the spring is disturbed by external forces and is easily deformed in the radial direction and becomes a bow shape, which affects the accuracy of the experimental results.

To this end, we proposed a fatigue resistance experimental device.

Utility Model Content

The utility model provides a fatigue resistance experimental device for preventing a spring from deflecting.

To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fatigue resistance test device, including a workbench, a detection spring, a control cam, a sliding mounting platform for installing the detection spring, a fixed mounting platform and an anti-bias mechanism, the control cam is rotatably installed on the upper end surface of the workbench, the sliding mounting platform is slidably installed on the upper end surface of the workbench, and the outer wall of the sliding mounting platform is slidably fitted with the outer wall of the control cam.

The anti-deflection mechanism includes a guide rod, a load-bearing bracket and a limit pin. The load-bearing bracket is fixedly installed on the outer wall of the workbench, the guide rod is detachably installed on the outer wall of the load-bearing bracket, the guide rod passes through the fixed mounting platform, and the limit pin is elastically installed on the outer wall of the fixed mounting platform, which can prevent the detection spring from bending and deforming along the radial transition, thereby improving the accuracy of the experiment.

Preferably, a support frame is slidably mounted on the upper end surface of the workbench, the sliding mounting platform is fixedly mounted on the outer wall of the support frame, the guide rod passes through the sliding mounting platform and is slidably connected to the sliding mounting platform, and the sliding connection between the sliding mounting platform and the workbench is achieved through the support frame.

Preferably, a control motor is fixedly mounted on the bottom surface of the workbench, and the output shaft of the control motor extends to the upper end surface of the workbench and is fixedly connected to the center position of the axial end of the control cam, so that the control cam is driven to rotate by the control motor.

Preferably, a limit plate can be detachably installed on the mutually adjacent sides of the sliding mounting platform and the fixed mounting platform, and one side of the limit plate is configured to be an arc shape adapted to the outer wall of the detection spring, and the detection spring is fixed by the limit plate.

Preferably, a pressure spring is fixedly installed on the inner wall of the fixed mounting platform, and the other end of the pressure spring is fixedly connected to the outer wall of the limit pin, so that the limit pin has a tendency to be plugged into the guide rod in real time, thereby improving the stability of the installation of the fixed mounting platform.

Preferably, a mounting pin is slidably mounted on the outer wall of the load-bearing bracket, one end of the mounting pin passes through the load-bearing bracket and is slidably plugged into the outer wall of the guide rod, and the guide rod is fixed by plugging the mounting pin into the guide rod.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model uses a guide rod, a bearing bracket and a limit pin. During detection, a detection spring to be detected is fixedly installed between a movable mounting platform and a fixed mounting platform, and the fixed mounting platform is fixed to the guide rod by the limit pin. The sliding mounting platform is controlled to slide back and forth by rotating the control cam to compress and release the spring, so that the fatigue of the detection spring can be detected. The guide rod passes through the detection spring. When the detection spring undergoes elastic deformation, the detection spring can be prevented from being bent and deformed in a radial transition, thereby improving the accuracy of the experiment.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG2 is a schematic diagram of the installation of the drive motor in the utility model;

FIG3 is a schematic diagram of the installation of the guide rod in the utility model;

FIG. 4 is a cross-sectional view of the fixed mounting platform in the present invention.

In the figure: 1. workbench; 2. control cam; 3. sliding mounting table; 4. detection spring; 5. limit pin; 6. guide rod; 7. mounting pin; 8. load-bearing bracket; 9. fixed mounting table; 10. support frame; 11. control motor; 12. top pressure spring; 13. limit plate.

Detailed ways

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 of 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.

Example 1

Please refer to Figures 1-4, which show a fatigue resistance test device, including a workbench 1, a detection spring 4, a control cam 2, a sliding mounting table 3 for mounting the detection spring 4, a fixed mounting table 9 and an anti-bias mechanism, wherein the bottom surface of the workbench 1 is provided with a support column for connecting to the ground.

The control cam 2 is rotatably mounted on the upper end surface of the workbench 1, and the control cam 2 can rotate along its own axis.

The sliding mounting platform 3 is slidably mounted on the upper end surface of the workbench 1 , and the sliding mounting platform 3 can slide in a horizontal direction.

The outer wall of the sliding mounting platform 3 is slidably fitted with the outer wall of the control cam 2 , and the control cam 2 is rotated to press the sliding mounting platform 3 through the radial outer wall of the control cam 2 , thereby controlling the sliding mounting platform 3 to slide.

During the experiment, the sliding mounting platform 3 is fixed, and then one end of the detection spring 4 to be tested is fixed to the sliding mounting platform 3, and then the other end of the detection spring 4 is fixed to the sliding mounting platform 3. The control cam 2 is rotated to control the sliding mounting platform 3 to slide back and forth, compress and release the spring, so that the fatigue of the detection spring 4 can be detected.

The anti-deviation mechanism includes a guide rod 6, a bearing bracket 8 and a limit pin 5. The bearing bracket 8 is fixedly mounted on the outer wall of the workbench 1, and the bearing bracket 8 is a common L-shaped bracket.

The guide rod 6 can be detachably mounted on the outer wall of the supporting bracket 8, and the guide rod 6 passes through the fixed mounting platform 9. During detection, the guide rod 6 passes through the detection spring 4. When the detection spring 4 undergoes elastic deformation, the detection spring 4 can be prevented from transitionally bending and deforming in the radial direction, thereby improving the accuracy of the experiment.

The limit pin 5 is elastically mounted on the outer wall of the fixed mounting platform 9. A cylindrical accommodating portion is opened on the outer wall of the guide rod 6. The limit pin 5 passes through the fixed mounting platform 9 and is plugged into the guide rod 6 to fix the fixed mounting platform 9 for easy detection experiments.

Among them, there are multiple cylindrical accommodating parts evenly arranged on the outer wall of the guide rod 6, and the limiting pin 5 is plugged into the accommodating parts at different positions, so that the fixed mounting platform 9 can be fixed at different positions to adapt to the detection experiment of the detection spring 4 with different lengths.

The outer wall of the load-bearing bracket 8 is slidably mounted with a mounting pin 7 , one end of which passes through the load-bearing bracket 8 and is slidably plugged into the outer wall of the guide rod 6 , and the guide rod 6 is fixed by plugging the mounting pin 7 into the guide rod 6 .

When it is necessary to replace a different detection spring 4 for experiment, pull out the installation pin 7, and at the same time slide the limit pin 5 to separate the guide rod 6, and finally pull the guide rod 6 out of the outer wall of the supporting bracket 8, replace another detection spring 4, and reinsert the guide rod 6. The guide rod 6 is fixed by the installation pin 7, and the fixed mounting platform 9 is fixed by the limit pin 5 to complete the replacement.

Example 2

Please refer to Figures 1-4, this implementation further illustrates Example 1:

A support frame 10 is slidably mounted on the upper end surface of the workbench 1, and the outer wall of the support frame 10 slides in contact with the outer wall of the workbench 1. The sliding mounting platform 3 is fixedly mounted on the outer wall of the support frame 10, and the sliding connection between the sliding mounting platform 3 and the workbench 1 is achieved through the support frame 10.

The guide rod 6 passes through the sliding mounting platform 3 and is slidably connected to the sliding mounting platform 3 , which can effectively improve the sliding stability of the sliding mounting platform 3 when the sliding mounting platform 3 is slidably adjusted.

A control motor 11 is fixedly mounted on the bottom surface of the workbench 1. The control motor 11 is a common stepping motor. The specific model can be selected according to actual use requirements, and will not be described in detail here.

The output shaft of the control motor 11 extends to the upper end surface of the workbench 1 and is fixedly connected to the center position of the axial end of the control cam 2 , and the control motor 11 drives the control cam 2 to rotate.

The limiting plate 13 can be detachably installed on the mutually adjacent sides of the sliding mounting platform 3 and the fixed mounting platform 9, and the limiting plate 13 is fixed by screws.

One side of the limiting plate 13 is configured to be in an arc shape that matches the outer wall of the detection spring 4 , and the detection spring 4 is fixed by the limiting plate 13 .

A pressure spring 12 is fixedly installed on the inner wall of the fixed mounting platform 9, and the other end of the pressure spring 12 is fixedly connected to the outer wall of the limit pin 5. Through the elastic force of the pressure spring 12, the limit pin 5 has a tendency to be plugged into the guide rod 6 in real time, thereby improving the installation stability of the fixed mounting platform 9.

It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include"-"comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process-method-article or device.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. The utility model provides a fatigue resistance experimental apparatus which characterized in that: the automatic detection device comprises a workbench (1), a detection spring (4), a control cam (2), a sliding mounting table (3) for mounting the detection spring (4), a fixed mounting table (9) and an anti-deviation mechanism, wherein the control cam (2) is rotatably mounted on the upper end face of the workbench (1), the sliding mounting table (3) is slidably mounted on the upper end face of the workbench (1), and the outer wall of the sliding mounting table (3) is slidably attached to the outer wall of the control cam (2);

The anti-deviation mechanism comprises a guide rod (6), a bearing support (8) and a limiting pin (5), wherein the bearing support (8) is fixedly installed on the outer wall of the workbench (1), the guide rod (6) is detachably installed on the outer wall of the bearing support (8), the guide rod (6) penetrates through the fixed installation table (9), and the limiting pin (5) is elastically installed on the outer wall of the fixed installation table (9).

2. The fatigue resistance experimental device according to claim 1, wherein: the upper end face of the workbench (1) is slidably provided with a supporting frame (10), the sliding installation table (3) is fixedly installed on the outer wall of the supporting frame (10), and the guide rod (6) penetrates through the sliding installation table (3) and is slidably connected with the sliding installation table (3).

3. The fatigue resistance experimental device according to claim 1, wherein: the bottom surface of workstation (1) fixed mounting has control motor (11), the output shaft of control motor (11) extends to the up end of workstation (1) to with axial end central point of control cam (2) puts fixed connection.

4. The fatigue resistance experimental device according to claim 1, wherein: the sliding mounting table (3) and the side, close to each other, of the fixed mounting table (9) are detachably provided with limiting plates (13), and one side of each limiting plate (13) is arranged into an arc shape matched with the outer wall of the corresponding detection spring (4).

5. The fatigue resistance experimental device according to claim 1, wherein: the inner wall of the fixed mounting table (9) is fixedly provided with a jacking spring (12), and the other end of the jacking spring (12) is fixedly connected with the outer wall of the limiting pin (5).

6. The fatigue resistance experimental device according to claim 1, wherein: the outer wall sliding mounting of bearing support (8) has mounting pin (7), the one end of mounting pin (7) runs through bearing support (8) and with the outer wall sliding grafting of guide bar (6).