Rigidity testing device

Abstract

The utility model provides a rigidity testing device, comprising an installation platform used for bearing a piece to be tested; the loading device is arranged opposite to the mounting platform and is used for applying a load to the to-be-tested piece; one end of the measuring rod is used for being mounted on a stress surface of a to-be-measured piece, and a gap is formed between the measuring rod and the loading device; and the displacement detection device is arranged on the mounting platform and is used for detecting the displacement of the end part of the other end of the measuring rod. According to the rigidity testing device provided by the utility model, when a load is applied to the to-be-tested piece through the loading device which is arranged opposite to the mounting platform, the loading device cannot interfere with the measuring rod, so that the measuring rod can be ensured not to deform, the measuring precision is improved, deformation caused by loaded stress is avoided, and the rigidity of the to-be-tested piece is improved. And the measurement error is reduced. Meanwhile, when the piece to be tested deforms very small, the deformation amount can be accurately and quickly tested.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, and particularly relates to a rigidity testing device. Background Art

[0002] As one of the key components of industrial robots, the rigidity of the main bearing of a speed reducer affects the deformation angle and stability of the industrial robot in the bending direction when bearing a load. Excellent main bearing rigidity can reduce the jitter and deformation of the industrial robot during load changes such as movement and operation. Therefore, it is necessary to test the bending rigidity of the speed reducer of the industrial robot. When testing the rigidity of the main bearing of the speed reducer, it is usually necessary to measure the angular displacement of the flange surface of the speed reducer under the action of a bending force. Currently, there are mainly two testing methods:

[0003] 1. Directly measure the flange surface: Use high-precision devices such as dial gauges or angle gauges to directly measure the inclination angle of the flange surface. This method is applicable to cases with large angular displacements. However, for small speed reducers, since the displacement of the flange surface is very small and the volume of the measuring tool is large, it is difficult to implement.

[0004] 2. Measure the lever arm or its extension structure: Measure on the lever arm or its extension structure to amplify the deformation amount of the flange surface, thereby reducing the accuracy requirements for the measuring device. However, this method is easily affected by the deformation of the lever arm itself, and the magnification factor needs to be accurately measured, resulting in a complex and inefficient testing process.

[0005] Therefore, how to design a more simple and accurate rigidity testing device to improve the testing efficiency and accuracy has become an urgent problem to be solved at present. Summary of the Utility Model

[0006] The utility model aims to at least solve the problems of complex testing of the rigidity of the main bearing of the speed reducer, difficulty in implementation, and low testing accuracy.

[0007] To this end, a first aspect of the utility model provides a rigidity testing device.

[0008] In view of this, a first aspect of the utility model proposes a rigidity testing device, including: a mounting platform for carrying a test piece; a loading device oppositely arranged with the mounting platform for applying a load to the test piece; a measuring rod, one end of the measuring rod is used for mounting on the stress surface of the test piece, and there is a gap between the measuring rod and the loading device; a displacement detection device arranged on the mounting platform for detecting the displacement amount of the end of the other end of the measuring rod.

[0009] The rigid testing device provided by the present utility model includes an installation platform, a loading device, a measuring rod, and a displacement detection device. The installation platform can carry the test piece to be measured and fix the test piece to perform rigid testing. One end of the measuring rod can be installed on the stress surface of the test piece, and there is a gap between the measuring rod and the loading device. When a load is applied to the test piece through the loading device disposed opposite to the installation platform, the loading device will not interfere with the measuring rod, which can ensure that the measuring rod itself will not deform, thereby improving the measurement accuracy. Specifically, the displacement detection device can be disposed on the installation platform, and the displacement detection device can detect the displacement of the other end of the measuring rod, so that the deformation angle of the test piece can be calculated based on the displacement and the distance between the displacement detection device and the test piece, and then the rigidity of the test piece can be determined. It can be understood that since the measuring rod is directly connected to the stress surface of the test piece and does not contact the loading device during the test of the present application, the deformation caused by the applied stress is avoided, and the measurement error is reduced. At the same time, since the present application magnifies the deformation amount of the test piece by setting the measuring rod, even when the deformation of the test piece is very small, the deformation amount can be accurately and quickly measured.

[0010] According to the rigid testing device provided by the present utility model, the following additional technical features may also be included:

[0011] In some embodiments, optionally, the rigid testing device further includes: a magnetic member disposed at one end of the measuring rod, and the measuring rod is installed on the stress surface of the test piece through the magnetic member.

[0012] In these embodiments, the rigid testing device further includes a magnetic member. The magnetic member is disposed at one end of the measuring rod, and the measuring rod can be installed on the stress surface of the test piece through the magnetic member. By providing the magnetic member, the installation of the measuring rod is facilitated, the testing steps are reduced, and the testing efficiency is improved.

[0013] In some embodiments, optionally, the rigid testing device further includes: a support base installed on the installation platform; a support arm, one end of the support arm is installed on the support base, and the displacement detection device is adjustably installed at the other end of the support arm.

[0014] In these embodiments, the rigid testing device further includes a support base and a support arm. The support base is installed on the installation platform, one end of the support arm is installed on the support base, and the displacement detection device is adjustably installed at the other end of the support arm. By providing the support base and the support arm, the position adjustment of the displacement detection device is facilitated, so that the displacement detection device can be adjusted according to different test pieces to improve the applicability of the rigid testing device.

[0015] In some embodiments, optionally, the rigid test device further includes: a sliding guide rail disposed at the other end of the support arm, and a displacement detection device is mounted on the sliding guide rail and can slide along the sliding guide rail.

[0016] In these embodiments, a sliding guide rail can be disposed at the other end of the support arm, and then the displacement detection device is mounted on the sliding guide rail so that the displacement detection device can slide along the sliding guide rail. By providing the sliding guide rail, it is convenient to adjust the displacement detection device, thereby improving the test accuracy.

[0017] In some embodiments, optionally, the loading device includes: at least two push-pull devices disposed on the mounting platform; a loading arm, and opposite ends of the loading arm are respectively connected to the push-pull devices, and the push-pull devices are used to apply a thrust or a pull force to both ends of the loading arm to apply a load to the test piece through the loading arm.

[0018] In these embodiments, the loading device includes at least two push-pull devices and a loading arm. The push-pull devices can apply a thrust and a pull force, so that both ends of the loading arm can be respectively connected to at least one push-pull device, and thus a thrust or a pull force can be applied to the loading arm through the push-pull devices, and further a load can be applied to the test piece through the loading arm for testing. It can be understood that since push-pull devices are provided at both ends of the loading arm, in actual testing, a push-pull device at one end of the loading arm can apply a thrust and a push-pull device at the other end can apply a pull force, so that a bending moment is formed on the stress surface of the test piece, causing the test piece to deform, thereby facilitating the testing.

[0019] In some embodiments, optionally, the rigid test device further includes: an avoidance opening disposed on the loading arm for avoiding the measuring rod.

[0020] In these embodiments, an avoidance opening can be provided on the loading arm to avoid the measuring rod through the avoidance opening, preventing deformation of the measuring rod itself caused by the loading stress, improving the measurement accuracy, and reducing the error of the test device.

[0021] In some embodiments, optionally, one end of the measuring rod is bonded to the stress surface of the test piece.

[0022] In these embodiments, one end of the measuring rod can be bonded to the stress surface of the test piece, and the bonding method is relatively stable, which is beneficial to improving the test accuracy.

[0023] In some embodiments, optionally, one end of the measuring rod is clamped to the stress surface of the test piece.

[0024] In these embodiments, one end of the measuring rod can be clamped to the stress surface of the test piece, and the clamping method is convenient for installation and disassembly, so the test efficiency can be improved.

[0025] In some embodiments, optionally, the number of measuring rods is multiple, and the multiple measuring rods are evenly distributed on the force-bearing surface of the workpiece to be measured.

[0026] In these embodiments, multiple measuring rods can be provided for measurement, so as to more accurately determine the rigidity of the workpiece to be measured. To improve the accuracy, the multiple measuring rods can be evenly distributed on the force-bearing surface of the workpiece to be measured.

[0027] In some embodiments, optionally, the number of displacement detection devices is multiple, and the multiple displacement detection devices are arranged in one-to-one correspondence with the multiple measuring rods.

[0028] In these embodiments, the displacement detection devices can also be provided in multiple numbers. Detection is performed through the multiple displacement detection devices, and setting the multiple displacement detection devices in one-to-one correspondence with the multiple measuring rods can improve the overall test efficiency.

[0029] In some embodiments, optionally, the displacement detection device includes at least one of a laser displacement sensor, an inductive displacement sensor, a capacitive displacement sensor, and an ultrasonic displacement sensor.

[0030] The additional aspects and advantages of the present utility model will become apparent in the following description section, or be learned through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0032] Figure 1 FIG. 1 shows a schematic structural diagram of a rigidity testing device according to an embodiment of the present utility model;

[0033] Figure 2 FIG. 2 shows a partial structural diagram of a rigidity testing device according to an embodiment of the present utility model;

[0034] Figure 3 FIG. 3 shows a partial structural diagram of a rigidity testing device according to an embodiment of the present utility model;

[0035] Figure 4 FIG. 4 shows a partial structural diagram of a rigidity testing device according to an embodiment of the present utility model;

[0036] Figure 5 FIG. 5 shows a partial structural diagram of a rigidity testing device according to an embodiment of the present utility model;

[0037] Figure 6 FIG. 6 shows a schematic structural diagram of a rigidity testing device according to an embodiment of the present utility model.

[0038] Wherein,Figures 1 to 6 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0039] 1 mounting platform, 12 support base, 14 support arm, 16 sliding guide rail, 2 loading device, 3 measuring rod, 4 displacement detection device, 5 magnetic member, 6 pusher, 7 loading arm, 72 avoidance opening, 8 workpiece to be measured, 10 rigidity testing device. Detailed implementation manners

[0040] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0041] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0042] Next, refer to Figures 1 to 6 Describe a rigidity testing device according to some embodiments of the present invention.

[0043] According to an embodiment of the first aspect of the present invention, as Figures 1 to 6 shown, a rigidity testing device 10 is provided, including a mounting platform 1, a loading device 2, a measuring rod 3 and a displacement detection device 4. The mounting platform 1 is used to carry the workpiece to be measured 8. The loading device 2 is disposed opposite to the mounting platform 1 and is used to apply a load to the workpiece to be measured 8. One end of the measuring rod 3 is used to be mounted on the force-bearing surface of the workpiece to be measured 8, and a gap is provided between the measuring rod 3 and the loading device 2. The displacement detection device 4 is disposed on the mounting platform 1 and is used to detect the displacement amount of the end of the other end of the measuring rod 3.

[0044] The rigid testing device 10 provided by the present utility model includes an installation platform 1, a loading device 2, a measuring rod 3, and a displacement detection device 4. The installation platform 1 can carry the test piece 8 and fix the test piece 8, so as to perform a rigid test. One end of the measuring rod 3 can be installed on the stress surface of the test piece 8, and there is a gap between the measuring rod 3 and the loading device 2. Thus, when a load is applied to the test piece 8 through the loading device 2 disposed opposite to the installation platform 1, the loading device 2 will not interfere with the measuring rod 3, which can ensure that the measuring rod 3 itself will not deform, thereby improving the measurement accuracy. Specifically, the displacement detection device 4 can be disposed on the installation platform 1, and the displacement detection device 4 can detect the displacement amount of the other end of the measuring rod 3. Thus, the deformation angle of the test piece 8 can be calculated based on the displacement amount and the distance between the displacement detection device 4 and the test piece 8, and then the rigidity of the test piece 8 can be determined. It can be understood that since in the present application, during the test, the measuring rod 3 is directly connected to the stress surface of the test piece 8 and does not contact the loading device 2, the deformation caused by the applied stress is avoided, and the measurement error is reduced. At the same time, since in the present application, the deformation amount of the test piece 8 is amplified by setting the measuring rod 3, when the deformation of the test piece 8 is very small, the deformation amount can also be accurately and quickly measured.

[0045] In some embodiments, optionally, as Figure 3 and Figure 5 shown, the rigid testing device 10 further includes: a magnetic member 5 disposed at one end of the measuring rod 3, and the measuring rod 3 is installed on the stress surface of the test piece 8 through the magnetic member 5.

[0046] In these embodiments, the rigid testing device 10 further includes a magnetic member 5. The magnetic member 5 is disposed at one end of the measuring rod 3, and the measuring rod 3 can be installed on the stress surface of the test piece 8 through the magnetic member 5. By providing the magnetic member 5, the installation of the measuring rod 3 is facilitated, the testing steps are reduced, and the testing efficiency is improved.

[0047] In some embodiments, optionally, the magnetic member 5 includes a strong magnet.

[0048] In some embodiments, optionally, the magnetic member 5 is bonded to one end of the measuring rod 3.

[0049] In some embodiments, optionally, the magnetic member 5 is fixed to one end of the measuring rod 3 by screws.

[0050] In some embodiments, optionally, the rigid testing device 10 further includes a control device for detecting the distance between the displacement detection device 4 and the test piece 8, and calculating the deformation angle of the test piece 8 based on the distance and the displacement amount.

[0051] In some embodiments, optionally, the rigid testing device 10 is specifically configured to detect the distance between the displacement detection device 4 and the center of the test piece 8.

[0052] In some embodiments, optionally, as Figure 3 and Figure 4 shown, the rigid test device 10 further includes: a support base 12, mounted on the mounting platform 1; a support arm 14, one end of the support arm 14 is mounted on the support base 12, and the displacement detection device 4 is adjustably mounted on the other end of the support arm 14.

[0053] In these embodiments, the rigid test device 10 further includes a support base 12 and a support arm 14. The support base 12 is mounted on the mounting platform 1, one end of the support arm 14 is mounted on the support base 12, and the displacement detection device 4 is adjustably mounted on the other end of the support arm 14. By providing the support base 12 and the support arm 14, the position adjustment of the displacement detection device 4 can be facilitated, so that the displacement detection device 4 can be adjusted according to different workpieces to be tested 8, thereby improving the applicability of the rigid test device 10.

[0054] In some embodiments, optionally, as Figure 2 and Figure 3 shown, the rigid test device 10 further includes: a sliding guide rail 16, provided at the other end of the support arm 14, and the displacement detection device 4 is mounted on the sliding guide rail 16 and can slide along the sliding guide rail 16.

[0055] In these embodiments, a sliding guide rail 16 can be provided at the other end of the support arm 14, and then the displacement detection device 4 is mounted on the sliding guide rail 16, so that the displacement detection device 4 can slide along the sliding guide rail 16. By providing the sliding guide rail 16, the adjustment of the displacement detection device 4 is facilitated, thereby improving the test accuracy.

[0056] In some embodiments, optionally, the displacement detection device 4 can slide along the height direction of the mounting platform 1.

[0057] In some embodiments, optionally, the displacement detection device 4 is located below the measuring rod 3.

[0058] In some embodiments, optionally, the displacement detection device 4 can slide along the circumferential direction of the mounting platform 1.

[0059] In some embodiments, optionally, the loading device 2 includes: at least two push-pull devices 6, provided on the mounting platform 1; a loading arm 7, opposite ends of the loading arm 7 are respectively connected to the push-pull devices 6, and the push-pull devices 6 are used to apply a thrust or a pull force to both ends of the loading arm 7, so as to apply a load to the workpiece to be tested 8 through the loading arm 7.

[0060] In these embodiments, the loading device 2 includes at least two push-pull devices 6 and a loading arm 7. The push-pull device 6 can apply a pushing force and a pulling force, so that both ends of the loading arm 7 can be connected to at least one push-pull device 6 respectively. In this way, a pushing force or a pulling force can be applied to the loading arm 7 through the push-pull device 6, and then a load can be applied to the test piece 8 through the loading arm 7 for testing. It can be understood that since the push-pull devices 6 are arranged at both ends of the loading arm 7, in actual testing, the push-pull device 6 at one end of the loading arm 7 can apply a pushing force, and the other end can apply a pulling force. In this way, a bending moment will be formed on the stress surface of the test piece 8, causing the test piece 8 to deform, so as to facilitate testing.

[0061] In some embodiments, optionally, the rigid test device 10 further includes: an avoidance opening 72, which is arranged on the loading arm 7 and is used to avoid the measuring rod 3.

[0062] In these embodiments, the avoidance opening 72 can be arranged on the loading arm 7, and the measuring rod 3 is avoided through the avoidance opening 72, which avoids the deformation caused by the loading stress on the measuring rod 3 itself, improves the measurement accuracy, and reduces the error of the test device.

[0063] In some embodiments, optionally, one end of the measuring rod 3 is bonded to the stress surface of the test piece 8.

[0064] In these embodiments, one end of the measuring rod 3 can be bonded to the stress surface of the test piece 8. The bonding method is relatively stable, which is beneficial to improving the test accuracy.

[0065] In some embodiments, optionally, one end of the measuring rod 3 is clamped to the stress surface of the test piece 8.

[0066] In these embodiments, one end of the measuring rod 3 can be clamped to the stress surface of the test piece 8. The clamping method is convenient for installation and disassembly, so the test efficiency can be improved.

[0067] In some embodiments, optionally, the number of the measuring rods 3 is multiple, and the multiple measuring rods 3 are evenly distributed on the stress surface of the test piece 8.

[0068] In these embodiments, multiple measuring rods 3 can be set for measurement, so as to more accurately determine the rigidity of the test piece 8. In order to improve the accuracy, the multiple measuring rods 3 can be evenly distributed on the stress surface of the test piece 8.

[0069] In some embodiments, optionally, the number of the displacement detection devices 4 is multiple, and the multiple displacement detection devices 4 are arranged in one-to-one correspondence with the multiple measuring rods 3.

[0070] In these embodiments, the displacement detection device 4 can also be provided in multiple numbers. Detection is performed by multiple displacement detection devices 4. Enabling the multiple displacement detection devices 4 and the multiple measuring rods 3 to be arranged in one-to-one correspondence can improve the overall test efficiency.

[0071] In some embodiments, optionally, the displacement detection device 4 includes at least one of a laser displacement sensor, an inductive displacement sensor, a capacitive displacement sensor, and an ultrasonic displacement sensor.

[0072] In some embodiments, optionally, the workpiece 8 to be measured includes a speed reducer.

[0073] In some embodiments, optionally, the workpiece 8 to be measured is fixedly connected to the installation platform 1 by bolts.

[0074] In some embodiments, optionally, the support base 12 is fixed to the installation platform 1 by screws.

[0075] In some embodiments, optionally, the support arm 14 and the sliding guide 16 are positioned by a positioning pin.

[0076] In some embodiments, optionally, the measuring rod 3 is a mirror-polished part.

[0077] To facilitate the description of the technical solution of the present application, the following specifically describes it in combination with the solutions in the related art:

[0078] 1. When testing the rigidity of the main bearing of a speed reducer, it is necessary to load the speed reducer in the bending direction through a push-pull actuator and a force arm, and test the bending angular displacement of the flange surface of the speed reducer. Currently, due to space limitations, there are two main types of angular displacement testing methods. One is to measure the angle on the output flange surface of the speed reducer, and the other is to test on the bending loading force arm or its attached extension structure.

[0079] 2. For the method of measuring the angle on the output flange surface of the speed reducer, there are currently two common testing means. One is to directly test the flange surface with a micrometer and calculate the inclination angle through the displacement of the flange surface. The other is to measure with equipment models such as an angle gauge that directly measures the plane inclination angle. For the testing method of directly measuring the flange surface, since the angular displacement of the flange surface is very small, an instrument with very high resolution and accuracy is required for testing. At the same time, there are high requirements for the roughness and flatness of the measurement surface. And because the measuring instrument has a certain volume, there is not enough space for testing small-sized speed reducers, making it difficult to implement.

[0080] 3. The method of measuring on the attached extension structure on the bending lever arm essentially reduces the accuracy requirements for the testing equipment by magnifying the deformation of the flange surface. However, during the application of a large bending moment, the bending lever arm itself will undergo stiffness deformation under load. Even if an attached extension structure is installed at the joint surface between the reducer flange surface and the bending lever arm to avoid the deformation of the bending lever arm itself, the measured value will still be affected by factors such as the extrusion stress at the joint surface and the deformation of the bolts, thereby interfering with the test results. Secondly, this method requires precise measurement of the position of the measurement point itself in order to calculate the magnification factor of the deformation, which makes the measurement steps cumbersome and the test efficiency low.

[0081] In summary, it can be seen that it is difficult to achieve high-precision testing of the bending angular displacement of the main bearing rigidity testing equipment for reducers in the related art. Therefore, this application proposes a device that magnifies the deformation angular displacement of the reducer through a magnetic adsorption measuring bar, and then measures the displacement of the magnetic adsorption measuring bar through a laser distance sensor with a calibrated position, and calculates the angular deformation.

[0082] Specifically, this application provides a rigidity testing device, which is composed of 5 modules: a base (installation platform), a loading module (loading device), a reducer under test (test piece), a magnetic adsorption measuring bar (measuring rod), a laser sensor (displacement detection device), and a laser sensor fixing seat (support seat and support arm). Among them, the reducer under test is fixedly connected to the loading module by bolts, and the laser sensor fixing seat is fixedly connected to the base and the loading module by bolts.

[0083] In some embodiments, optionally, the laser sensor fixing seat includes a fixing seat support frame, an extension bar, and a vertical guide rail. Among them, the fixing seat support frame is fixedly connected to the base and the loading module by screws, and is fixedly connected to the extension bar by threads. The extension bar is precisely fixed to the vertical guide rail by bolts and a set of positioning pins. The laser sensor is fixed on the vertical guide rail, and together they can achieve the position adjustment and fixation of the laser sensor in the vertical direction.

[0084] As Figure 6 shown, the distance L between the laser sensor and the center straight port of the reducer under test needs to be calibrated in advance, and the calibration results can be reused.

[0085] In some embodiments, optionally, the fixed side of the magnetic adsorption measuring bar is the magnetic side, on which a strong magnet is installed. The other side is the measurement side, which needs to be mirror polished.

[0086] In some embodiments, optionally, one side of the magnetic adsorption measuring bar is magnetically connected to the output flange of the reducer under test, and the other side needs to cover the laser sensor in the vertical direction to ensure that the laser sensor can collect the displacement information of the magnetic adsorption measuring bar. There is no direct connection between the magnetic adsorption measuring bar and the base and the loading module.

[0087] The following describes the operation steps when using the rigid test device provided by this application:

[0088] 1. Fix and connect the reducer under test that needs to perform the test task to the base and the loading module, and ensure the coaxiality between the loading module and the reducer under test through the tooling straight port.

[0089] 2. Install the magnetic adsorption measuring bar on the measuring surface of the reducer under test.

[0090] 3. Adjust the vertical position of the laser sensor through the vertical guide rail to ensure that the magnetic adsorption measuring bar falls within the effective measurement range of the sensor.

[0091] 4. Start the device, and the base and the loading module apply a load to the reducer under test, causing angular deformation of the flange surface of the reducer under test, and amplifying the deformation through the magnetic adsorption measuring bar. The laser sensor collects the deformation amount e.

[0092] 5. Calculate the deformation angle, the deformation angle

[0093] 6. After the test is completed, disassemble the reducer under test.

[0094] This application has the following beneficial effects:

[0095] 1. The measuring bar is directly connected to the surface of the reducer under test and does not contact the loading module at the same time, avoiding deformation caused by the stress of loading and reducing the measurement error.

[0096] 2. The magnetic adsorption method is used to fixedly connect the measuring bar to the surface of the output flange of the reducer, avoiding the deformation caused by the loading stress on the measuring bar itself, improving the measurement accuracy, reducing the test system error, and having convenient installation.

[0097] 3. A laser distance measuring sensor is used as the displacement measurement instrument, and the fixed position of the sensor is pre-calibrated. Combined with the magnetic adsorption measuring bar, the test steps are reduced, and the test efficiency and test accuracy are improved.

[0098] In this utility model, the term "a plurality of" means two or more unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific situations.

[0099] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0100] The foregoing are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rigidity testing device, characterized in that: include: A mounting platform for carrying the test piece; A loading device, arranged opposite to the mounting platform, and used for applying a load to the test piece; A measuring rod, one end of which is used to be mounted on the force-bearing surface of the workpiece to be measured, and a gap is provided between the measuring rod and the loading device; The displacement detection device is arranged on the installation platform and is used to detect the displacement of the end of the other end of the measuring rod.

2. The rigidity testing device according to claim 1, characterized in that: Also includes: The magnetic component is arranged on one end of the measuring rod, and the measuring rod is installed on the force-bearing surface of the object to be measured through the magnetic component.

3. The rigidity testing device according to claim 1, characterized in that: Also includes: A support seat, mounted on the mounting platform; A support arm, one end of which is mounted on the support seat, and the displacement detection device is adjustably mounted on the other end of the support arm.

4. The rigidity testing device according to claim 3, characterized in that: Also includes: A sliding guide rail is arranged at the other end of the support arm, and the displacement detection device is installed on the sliding guide rail and can slide along the sliding guide rail.

5. The rigidity testing device according to claim 1, characterized in that: The loading device comprises: At least two push-pull devices are arranged on the mounting platform; A loading arm, wherein two opposite ends of the loading arm are respectively connected to the push-pull device, and the push-pull device is used to apply a pushing force or a pulling force to the two ends of the loading arm, so as to apply a load to the test piece through the loading arm.

6. The rigidity testing device according to claim 5, characterized in that: Also includes: An escape opening is arranged on the loading arm and is used to escape the measuring rod.

7. The rigidity testing device according to claim 1, characterized in that: One end of the measuring rod is bonded to the force-bearing surface of the piece to be measured; and / or One end of the measuring rod is clamped on the force-bearing surface of the piece to be measured.

8. The rigidity testing device according to any one of claims 1 to 7, characterized in that: There are multiple measuring rods, and the multiple measuring rods are evenly distributed on the force-bearing surface of the piece to be measured.

9. The rigidity testing device according to claim 8, characterized in that: There are multiple displacement detection devices, and the multiple displacement detection devices are arranged in a one-to-one correspondence with the multiple measuring rods.

10. The rigidity testing device according to any one of claims 1 to 7, characterized in that: The displacement detection device includes at least one of a laser displacement sensor, an inductive displacement sensor, a capacitive displacement sensor and an ultrasonic displacement sensor.

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