An impact torsion testing machine

Abstract

The present invention relates to the technical field of mechanical experimental devices, and in particular, to an impact type torsion testing machine, comprising a first support, a second support, an incident rod, a torsion bar, a torque loading mechanism, a torque control mechanism, an axial pressure loading mechanism and a thrust bearing; the torsion bar comprises a first connecting section, a second connecting section and a third connecting section sequentially connected along a first direction; the axial pressure loading mechanism is connected to the second connecting section, and the axial pressure loading mechanism is used to apply a thrust along the first direction to the second connecting section, so that the second connecting section and the second support jointly clamp the thrust bearing; the torque control mechanism is used to limit the rotation of the second connecting section when the torque applied by the torque loading mechanism to the third connecting section does not reach the experimental preset value; and is used to release the rotation restriction on the second connecting section when the torque applied by the torque loading mechanism to the third connecting section reaches the experimental preset value. Compared with the prior art, the impact type torsion testing machine has better structural stability.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical experimental devices, in particular to an impact type torsion testing machine. Background Art

[0002] The impact torsion tester is a test device used to test the performance of materials under the simultaneous action of axial pressure and torsion. The tester usually includes a pressure sensor and a torque sensor, and controls the magnitude and time of the loading force through a control system. The test sample is clamped between two fixtures, one of which generates axial pressure through a hydraulic cylinder, and the other fixture generates torque through a motor. During the test, the changes in pressure and torque are recorded by the sensor, and the strength, toughness, deformation and fatigue of the material can be analyzed based on the test results. The tester is widely used in research and development work in the fields of materials science, civil engineering, mechanical engineering, and aerospace.

[0003] In the prior art, due to limitations such as the structure of the testing machine and the material of the parts, the impact torsion testing machine has problems such as complex connection between the torque loading mechanism and the torsion bar and poor structural stability of the testing machine, which affects the experimental effect. Summary of the invention

[0004] In order to solve the problem that the connection mode between the torque loading mechanism and the torsion bar of the impact type torsion testing machine is complicated and the structural stability of the testing machine is poor, the present invention provides an impact type torsion testing machine, the impact type torsion testing machine comprises a first support, a second support, an incident bar, a torsion bar, a torque loading mechanism, a torque control mechanism, an axial pressure loading mechanism and a thrust bearing; wherein the torsion bar comprises a first connecting section, a second connecting section and a third connecting section which are sequentially connected along a first direction;

[0005] Along the first direction, the first end of the incident rod faces the first support, and the first end of the incident rod and the first support are used to clamp the sample together;

[0006] The second end of the incident rod is connected to the first end of the first connecting segment; the first end of the second connecting segment is connected to the second end of the first connecting segment, and the second end of the second connecting segment is connected to the first end of the third connecting segment; the second end of the third connecting segment is connected to the torque loading mechanism;

[0007] The second support has a first mounting hole, and the third connecting section is arranged through the first mounting hole; the thrust bearing is sleeved on the outer circumferential surface of the third connecting section, and the thrust bearing is installed between the second end of the second connecting section and the second support;

[0008] The axial pressure loading mechanism is connected to the second connecting section, and is used to apply a thrust along the first direction to the second connecting section, so that the second connecting section and the second support jointly clamp the thrust bearing;

[0009] The torque control mechanism is connected to the second connecting segment; the torque control mechanism is used to limit the rotation of the second connecting segment when the torque applied by the torque loading mechanism to the third connecting segment does not reach the experimental preset value; and is used to release the rotation restriction on the second connecting segment when the torque applied by the torque loading mechanism to the third connecting segment reaches the experimental preset value.

[0010] In some embodiments, the incident rod is a hollow rod, and the torsion rod is a solid rod; the incident rod has a second mounting hole, the first end of the first connecting segment is embedded in the second mounting hole, and the outer wall of the first end of the first connecting segment is in contact with the hole wall of the second mounting hole.

[0011] In some embodiments, the cross-sectional outer edge of the second connecting segment and the cross-sectional outer edge of the incident rod have the same shape and size.

[0012] In some embodiments, a third mounting hole is provided on the torque loading mechanism, the second end of the third connecting segment is embedded in the third mounting hole, and the outer wall of the second end of the third connecting segment is in contact with the hole wall of the third mounting hole.

[0013] In some embodiments, the first connecting segment and the third connecting segment are both polygonal structures.

[0014] In some embodiments, the first connecting segment and the third connecting segment are both regular polygonal structures.

[0015] In some embodiments, the first connecting segment and the third connecting segment are both regular hexagonal structures.

[0016] In some embodiments, a cross-sectional area of ​​the third connecting segment is greater than a cross-sectional area of ​​the first connecting segment.

[0017] In some embodiments, the impact torsion testing machine further comprises a base; the axial pressure loading mechanism comprises a thrust cylinder and a thrust transmission assembly; wherein,

[0018] The first support, the second support, the torque control mechanism and the torque loading mechanism are all mounted on the base;

[0019] The thrust transmission component connects the thrust cylinder and the second connecting section, and is used for transmitting the thrust generated by the thrust cylinder to the second connecting section; the thrust cylinder is installed on the first support.

[0020] In some embodiments, the impact type torsion testing machine also includes a third support mounted on the base; along the first direction, the third support is located between the first support and the second support; a fourth mounting hole is provided on the third support, and the middle part of the incident rod is arranged through the fourth mounting hole.

[0021] In some embodiments, the impact-type torsion testing machine further includes a plurality of tie rods arranged along the first direction; the first ends of the tie rods are connected to the first support, and the second ends of the tie rods are connected to the second support.

[0022] In some embodiments, the torque control mechanism includes a torsion-resistant fixing frame, an torsion-resistant ring and a support rod; wherein,

[0023] The anti-torsion ring is sleeved on the outside of the second connecting section and is detachably connected to the second connecting section; the anti-torsion ring is installed on the anti-torsion fixing frame through the support rod;

[0024] When the torque applied by the torque loading mechanism to the third connecting segment reaches the experimental preset value, the support rod breaks to release the rotation restriction on the second connecting segment.

[0025] In some embodiments, the torque control mechanism further includes a sliding block, a sliding rail and a limiter connected in a sliding manner; wherein,

[0026] The slider is fixedly connected to the first end of the support rod, and the second end of the support rod is fixedly connected to the anti-torsion ring; the slide rail is installed on the anti-torsion fixing frame; the limiter is connected to the slide rail; the limiter is used to limit the sliding of the slider relative to the slide rail when the torque loading mechanism applies torque to the third connecting section.

[0027] In some embodiments, the slide rail is a linear slide rail, the slide rail is arranged along the second direction, and the support rod is arranged along the third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0028] In some embodiments, the number of the sliding rails, the sliders, the limit members and the support rods are all two; before the support rod breaks, the two sliding rails, the two sliders, the two limit members and the two support rods are respectively distributed in a mirror-symmetrical manner relative to the axis of the second connecting section.

[0029] In some embodiments, the limiting member is a boss structure, and the limiting member is installed between the slide rail and the anti-torsion fixing frame.

[0030] In some embodiments, the outer circumference of the anti-torsion ring is cylindrical; there are multiple support rods with the same shape and size; and the multiple support rods are evenly arranged on the outer circumference of the anti-torsion ring.

[0031] The impact torsion testing machine provided by the present invention connects the torque control mechanism with the second connecting section of the torsion bar, so that the torque loading mechanism can apply torque to the torsion bar from the end of the second connecting section of the torsion bar, which is beneficial to simplifying the connection structure between the torque loading mechanism and the torsion bar; by setting the installation positions of the torque loading mechanism, the torque control mechanism, the axial pressure loading mechanism and the thrust bearing, it is possible to apply torque and axial pressure to both ends of the torsion bar respectively, which improves the structural stability of the impact torsion testing machine compared with the prior art, and is beneficial to improving the reliability of the experimental results. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A partial cross-sectional view of an impact torsion testing machine provided by an embodiment of the present application at a first viewing angle is shown;

[0033] Figure 2 A partial cross-sectional view of an impact torsion testing machine provided by an embodiment of the present application at a second viewing angle is shown;

[0034] Figure 3 for Figure 1 A cross-sectional view of an impact torsion testing machine provided by an embodiment of the present application in the AA direction is shown.

[0035] Figure markings: 100-first support, 200-second support, 300-incident rod, 400-torsion bar, 500-torque loading mechanism, 600-torque control mechanism, 601-anti-torsion fixing frame, 602-anti-torsion ring, 603-support rod, 604-slider, 605-slide rail, 606-limiting member, 701-thrust cylinder, 800-thrust bearing, 901-sample, 902-base, 903-third support, 904-pull rod. DETAILED DESCRIPTION

[0036] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0037] As used herein, the term "including" and variations thereof are to be interpreted as open-ended terms meaning "including but not limited to." The term "based on" is to be interpreted as "based, at least in part, on." The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment." The term "another embodiment" is to be interpreted as "at least one other embodiment."

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0040] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0042] This embodiment discloses an impact type torsion testing machine, such as Figure 1 and Figure 2 As shown, the impact type torsion testing machine includes a first support 100, a second support 200, an incident rod 300, a torsion bar 400, a torque loading mechanism 500, a torque control mechanism 600, an axial pressure loading mechanism (not shown) and a thrust bearing 800; wherein the torsion bar 400 includes a first connecting section (not shown), a second connecting section (not shown) and a third connecting section (not shown) which are sequentially connected along a first direction.

[0043] Along the first direction, the first end of the incident rod 300 faces the first support 100 , and the first end of the incident rod 300 and the first support 100 are used to clamp the sample 901 together.

[0044] The second end of the incident rod 300 is connected to the first end of the first connecting segment; the first end of the second connecting segment is connected to the second end of the first connecting segment, and the second end of the second connecting segment is connected to the first end of the third connecting segment; the second end of the third connecting segment is connected to the torque loading mechanism 500.

[0045] The second support 200 has a first mounting hole (not shown), and the third connecting section is arranged through the first mounting hole; the thrust bearing 800 is sleeved on the outer circumferential surface of the third connecting section, and the thrust bearing 800 is installed between the second end of the second connecting section and the second support 200.

[0046] The axial pressure loading mechanism is connected to the second connecting section, and is used to apply a thrust along a first direction to the second connecting section, so that the second connecting section and the second support 200 clamp the thrust bearing 800 together.

[0047] The torque control mechanism 600 is connected to the second connecting segment; the torque control mechanism 600 is used to limit the rotation of the second connecting segment when the torque applied by the torque loading mechanism 500 to the third connecting segment does not reach the experimental preset value; and is used to release the rotation restriction on the second connecting segment when the torque applied by the torque loading mechanism 500 to the third connecting segment reaches the experimental preset value.

[0048] In this embodiment, the first direction is perpendicular to both the second direction and the third direction, and when the impact-type torsion testing machine is in use, the first direction is usually parallel to a horizontal plane.

[0049] In this embodiment, the torque loading mechanism 500 is used to apply a torque of an experimental preset value to the third connection section of the torsion bar 400. The connection method between the torque loading mechanism 500 and the torsion bar 400 is not limited and can be reasonably selected according to actual application requirements. For example, it can be connected by embedding, hole matching, clamping, etc.

[0050] In this embodiment, the axial pressure loading mechanism is used to apply a thrust along the first direction to the second connecting section of the torsion bar 400. The specific type of the axial pressure loading mechanism is not limited and can be reasonably selected according to actual application requirements. For example, the axial pressure loading mechanism can be a hydraulic cylinder, a thrust cylinder, a cylinder, etc.

[0051] In this embodiment, the torque control mechanism 600 is used to limit the rotation of the second connecting section of the torsion bar 400 and release the rotation restriction of the second connecting section of the torsion bar 400. The specific structural form is not limited and can be reasonably selected according to actual application requirements. For example, it can be a motor torque limiter, a disc torque limiter, a hydraulic torque limiter, an anti-torsion fixing frame, an anti-torsion ring, and a support rod.

[0052] In this embodiment, the incident rod 300 is used to clamp the sample 901 together with the first support 100 and transmit the torque of the torsion bar 400 to the sample 901. The specific structural form is not limited and can be reasonably selected according to actual application requirements. For example, the incident rod 300 can be a hollow rod or a solid rod.

[0053] In this embodiment, the torsion bar 400 is used to transmit the torque of the torque loading mechanism 500 and the axial pressure of the axial pressure loading mechanism. The specific structure, shape, form and cross-sectional area are not limited and can be reasonably selected according to actual application requirements. For example, the torsion bar 400 can be a hollow bar or a solid bar; the first connecting section, the second connecting section and the third connecting section of the torsion bar 400 can be a cylinder, a cuboid, a hexagonal body, etc.; the cross-sectional areas of the first connecting section, the second connecting section and the third connecting section of the torsion bar 400 are not limited and can be the same or unequal.

[0054] In this embodiment, the thrust bearing 800 is used to store and release the thrust applied by the axial pressure loading mechanism. The specific structure is not limited and can be reasonably selected according to actual application requirements. For example, the thrust bearing 800 can be composed of one or more rolling elements and one or more retaining frames. The rolling elements roll in the retaining frames to bear the axial load.

[0055] In this embodiment, when the impact torsion testing machine is used for the experiment, first, the incident rod 300 is moved along the first direction to clamp the sample 901 between the first end of the incident rod 300 and the first support 100, the first end of the first connecting section of the torsion bar 400 is connected to the second end of the incident rod 300, the second connecting section of the torsion bar 400 is connected to the axial pressure loading mechanism, the third connecting section of the torsion bar 400 passes through the first mounting hole of the second support 200, and the second end of the third connecting section of the torsion bar 400 is connected to the torque loading mechanism 500; then, the axial pressure loading mechanism is used to apply a thrust to the second connecting section of the torsion bar 400, so that the second connecting section of the torsion bar 400 and the second support 200 jointly clamp the thrust bearing 800 sleeved on the outer circumferential surface of the third connecting section of the torsion bar 400, so that the thrust bearing 800 stores the thrust of the axial pressure loading mechanism; finally, the torque control mechanism 600 is connected to the second connecting section of the torsion bar 400, and the torque loading mechanism 500 is used to apply torque to the third connecting section of the torsion bar 400. When the torque applied to the third connecting section of the torsion bar 400 does not reach the preset value of the experiment, the torque control mechanism 600 limits the rotation of the second connecting section of the torsion bar 400. When the torque applied to the third connecting section of the torsion bar 400 reaches the preset value of the experiment, the torque control mechanism 600 releases the rotation restriction on the second connecting section of the torsion bar 400, so that the third connecting section of the torsion bar 400 rotates to generate torque. At the same time, the thrust bearing 800 releases the stored thrust of the axial pressure loading mechanism, so that the third connecting section of the torsion bar 400 generates axial pressure. The torsion bar 400 transmits the torque and axial pressure to the incident rod 300, and the incident rod 300 transmits the torque and axial pressure to the sample 901 between the incident rod 300 and the first support 100, thereby completing the dynamic composite loading experiment.

[0056] In this embodiment, the torque control mechanism 600 is connected to the second connecting section of the torsion bar 400, and the torque loading mechanism 500 can apply torque from the end of the second connecting section of the torsion bar 400, which is beneficial to simplify the connection structure between the torque loading mechanism 500 and the torsion bar 400; and through the torque loading mechanism 500, the torque control mechanism 600, the axial pressure loading mechanism and the thrust bearing 800, the torque loading mechanism 500 and the axial pressure loading mechanism can respectively apply torque and axial pressure from both ends of the third connecting section of the torsion bar 400, thereby improving the structural stability of the impact type torsion testing machine and being beneficial to improving the reliability of the experimental results.

[0057] Alternatively, if Figure 1 and Figure 2 As shown, the incident rod 300 may preferably be a hollow rod and the torsion rod 400 may be a solid rod; the incident rod 300 has a second mounting hole (not shown), the first end of the first connecting section is embedded in the second mounting hole, and the outer wall of the first end of the first connecting section is in contact with the hole wall of the second mounting hole.

[0058] In this embodiment, by setting the incident rod 300 as a hollow rod, the material usage of the impact type torsion testing machine can be reduced, and the weight can be reduced while saving costs. By setting the torsion bar 400 as a solid rod, the strength of the torsion bar 400 can be enhanced, and the maximum load value of the torsion bar 400 can be increased.

[0059] In this embodiment, the first ends of the first connecting sections of the incident rod 300 and the torsion bar 400 are detachably connected, and the first end of the first connecting section of the torsion bar 400 is embedded in the second mounting hole of the incident rod 300, so that the incident rod 300 and the torsion bar 400 can be quickly installed, which is convenient for the assembly of the incident rod 300 and the torsion bar 400, and saves the pre-experiment installation preparation time of the impact type torsion testing machine. The first end of the first connecting section of the torsion bar 400 is embedded in the second mounting hole of the incident rod 300, and the specific embedding connection method is not limited, and can be reasonably selected according to actual application requirements. For example, it can be a threaded connection, a fastener connection, a clamp connection, etc.

[0060] In this embodiment, in order to better transmit torque and axial force, the outer wall of the first end of the first connecting section of the torsion bar 400 is in contact with the hole wall of the second mounting hole of the incident rod 300 .

[0061] Furthermore, in order to better transmit torque and axial force, the outer edge of the cross section of the second connecting section of the torsion bar 400 has the same shape and size as the outer edge of the cross section of the incident rod 300 .

[0062] Furthermore, a third mounting hole (not shown) is provided on the torque loading mechanism 500, the second end of the third connecting section is embedded in the third mounting hole, and the outer wall of the second end of the third connecting section is in contact with the hole wall of the third mounting hole.

[0063] In this embodiment, the torque loading mechanism 500 and the second end of the third connecting section of the torsion bar 400 are detachably connected, and the second end of the third connecting section of the torsion bar 400 is embedded in the third mounting hole of the torque loading mechanism 500 to achieve a detachable connection between the torque loading mechanism 500 and the torsion bar 400, which is convenient for assembling the torque loading mechanism 500 and the torsion bar 400, and saves the pre-experimental installation preparation time of the impact type torsion testing machine. The second end of the third connecting section of the torsion bar 400 is embedded in the third mounting hole of the torque loading mechanism 500, and the specific embedding connection method is not limited, and can be reasonably selected according to actual application requirements. For example, it can be a threaded connection, a fastener connection, a clamp connection, etc.

[0064] In this embodiment, in order to better transmit torque and axial force, the outer wall of the second end of the third connecting section of the torsion bar 400 is in contact with the hole wall of the third mounting hole of the torque loading mechanism 500 .

[0065] Furthermore, the first connecting segment and the third connecting segment are both polyhedral structures.

[0066] In this embodiment, by setting the first connecting section and the third connecting section of the torsion bar 400 to be a polyhedral structure, the assembly of the torsion bar 400 and the transmission effect of the torque transmitted by the torsion bar 400 are facilitated, and the parts connected to the torsion bar 400 can be prevented from slipping, which affects the torque transmission effect. The first connecting section and the third connecting section of the torsion bar 400 are both set to a polygonal structure, and the specific polygonal structure is not limited and can be reasonably selected according to actual application requirements. For example, it can be a regular polyhedral structure or a non-regular polyhedral structure.

[0067] Furthermore, in order to ensure a better torque transmission effect, the first connecting section and the third connecting section of the torsion bar 400 are both regular polyhedron structures. The specific regular polyhedron structure is not limited and can be reasonably selected according to actual application requirements. For example, it can be a regular tetrahedron structure, a regular hexagonal structure, a regular octagonal structure, etc.

[0068] Furthermore, in order to facilitate the processing of the torsion bar 400 and achieve a better torque transmission effect, the first connecting section and the third connecting section of the torsion bar 400 are both regular hexahedral structures.

[0069] Furthermore, a cross-sectional area of ​​the third connecting segment is greater than a cross-sectional area of ​​the first connecting segment.

[0070] In this embodiment, by making the cross-sectional area of ​​the third connecting section of the torsion bar 400 larger than the cross-sectional area of ​​the first connecting section of the torsion bar 400, the cross-sectional area of ​​the third connecting section of the torsion bar 400 connected to the torque loading mechanism 500 is larger, and the cross-sectional area of ​​the first connecting section of the torsion bar 400 connected to the incident rod 300 is smaller, so that the contact area at the connection between the torsion bar 400 and the torsion bar 400 loading mechanism can be larger, which can prevent the torsion bar 400 from being twisted off; the wall thickness of the incident rod 300 can be made thicker at the connection position between the torsion bar 400 and the hollow incident rod 300, which is beneficial to improving the structural strength of the impact type torsion testing machine.

[0071] Alternatively, if Figure 1 and Figure 2 As shown, the impact type torsion testing machine also includes a base 902; the axial pressure loading mechanism includes a thrust cylinder 701 and a thrust transmission assembly (not shown); wherein the first support 100, the second support 200, the torque control mechanism 600 and the torque loading mechanism 500 are all installed on the base 902; the thrust transmission assembly connects the thrust cylinder 701 and the second connecting section, and is used to transmit the thrust generated by the thrust cylinder 701 to the second connecting section; the thrust cylinder 701 is installed on the first support 100.

[0072] In this embodiment, the base 902 is used to assemble other components, and the specific structural form is not limited, as long as the fixing and supporting functions can be achieved, and the material strength of the base 902 can meet the experimental requirements.

[0073] In this embodiment, the thrust cylinder 701 is used to generate thrust, and applies thrust along the first direction to the second connection section of the torsion bar 400 through the thrust transmission component, so that the second connection section of the torsion bar 400 and the second support 200 jointly clamp the thrust bearing 800. Since the axial pressure cylinder and the torque loading mechanism 500 are heavy, the thrust cylinder 701 is set on the first support 100, and the torque loading mechanism 500 is set on the third connection section of the torsion bar 400. The axial pressure cylinder and the torque loading mechanism 500 are respectively located at both ends of the impact type torsion tester along the first direction, so that the overall weight distribution of the impact type torsion tester is more balanced, and the stability of the tester is improved.

[0074] In this embodiment, the thrust transmission component connects the thrust cylinder 701 and the second connecting section of the torsion bar 400, and is used to transmit the thrust generated by the thrust cylinder 701 to the second connecting section of the torsion bar 400. The specific structure of the thrust transmission component is not limited and can be reasonably selected according to actual application requirements.

[0075] Furthermore, if Figure 1 and Figure 2 As shown, the impact type torsion testing machine also includes a third support 903 installed on the base 902; along the first direction, the third support 903 is located between the first support 100 and the second support 200; a fourth mounting hole (not shown) is provided on the third support 903, and the middle part of the incident rod 300 is arranged through the fourth mounting hole.

[0076] In this embodiment, by setting the third support 903 between the first support 100 and the second support 200, and setting the fourth mounting hole of the incident rod 300 through the third support 903, the third support 903 can guide the installation of the incident rod 300 and the movement of the incident rod 300, thereby preventing the incident rod 300 from being offset during installation and experimental movement.

[0077] Alternatively, if Figure 1 and Figure 2 As shown, the impact torsion testing machine further includes a plurality of pull rods 904 arranged along a first direction; a first end of the pull rod 904 is connected to the first support 100 , and a second end of the pull rod 904 is connected to the second support 200 .

[0078] In this embodiment, the pull rod 904 is used to provide a pre-tightening force to the first support 100 and the second support 200 to prevent the first support 100 and the second support 200 from being deformed due to the force applied during the experiment, thereby affecting the accuracy of the experiment.

[0079] Alternatively, if Figure 3 As shown, the torque control mechanism 600 includes an anti-torsion fixing frame 601, an anti-torsion ring 602 and a support rod 603; wherein,

[0080] The anti-torsion ring 602 is sleeved on the outside of the second connecting section and is detachably connected to the second connecting section; the anti-torsion ring 602 is installed on the anti-torsion fixing frame 601 through the support rod 603;

[0081] When the torque applied by the torque loading mechanism 500 to the third connecting segment reaches the experimental preset value, the support rod 603 breaks to release the rotation restriction on the second connecting segment.

[0082] In this embodiment, the anti-torsion fixing frame 601 is fixedly connected to the base 902, and the anti-torsion ring 602 is installed on the anti-torsion fixing frame 601 through the support rod 603. The anti-torsion ring 602 is detachably connected to the outside of the second connecting section of the torsion bar 400, so that the anti-torsion fixing frame 601, the anti-torsion ring 602 and the support rod 603 jointly restrict the rotation of the second connecting section of the torsion bar 400. When the torque applied by the torque loading mechanism 500 to the third connecting section of the torsion bar 400 reaches the preset value of the experiment, the support rod 603 breaks, and the anti-torsion ring 602 releases the rotation restriction on the second connecting section of the torsion bar 400. The rotation of the second connecting section of the torsion bar 400 can be restricted and released by the anti-torsion fixing frame 601, the anti-torsion ring 602 and the support rod 603. The anti-torsion fixing frame 601, the anti-torsion ring 602 and the support rod 603 are ingenious in structure, which optimizes the structure of the impact type torsion testing machine and facilitates the assembly of the impact type torsion testing machine.

[0083] In this embodiment, the anti-torsion fixing frame 601 is used to withstand the reaction force when the torsion bar 400 is loaded, prevent the anti-torsion ring 602 and the support rod 603 from displacement and rotation, and ensure the accuracy of the experimental results.

[0084] In this embodiment, the anti-torsion ring 602 is used to connect the torsion bar 400 and the support bar 603. The specific shape of the anti-torsion ring 602 is not limited and can be reasonably selected according to actual application requirements. For example, the outer peripheral surface of the anti-torsion ring 602 can be cylindrical, rectangular, etc.

[0085] In this embodiment, the support rods 603 are used to connect the anti-torsion fixing frame 601 and the anti-torsion ring 602. The specific number, shape, and size of the support rods 603 are not limited and can be reasonably selected according to actual application requirements. For example, the number of the support rods 603 can be one, two, or three; when the number of the support rods 603 is multiple, the shape and size of the support rods 603 can be the same or different; when the number of the support rods 603 is multiple, the support rods 603 can be evenly arranged on the outer peripheral surface of the anti-torsion ring 602, or unevenly arranged on the outer peripheral surface of the anti-torsion ring 602.

[0086] Furthermore, if Figure 3 As shown, the torque control mechanism 600 further includes a sliding block 604, a sliding rail 605 and a stopper 606 which are slidably connected; wherein,

[0087] The slider 604 is fixedly connected to the first end of the support rod 603, and the second end of the support rod 603 is fixedly connected to the anti-torsion ring 602; the slide rail 605 is installed on the anti-torsion fixed frame 601; the limiter 606 is connected to the slide rail 605; the limiter 606 is used to limit the sliding of the slider 604 relative to the slide rail 605 when the torque loading mechanism 500 applies torque to the third connecting section.

[0088] In this embodiment, by setting the slider 604 to be fixedly connected to the first end of the support rod 603, and the second end of the support rod 603 to be fixedly connected to the anti-torsion ring 602, the slider 604 can drive the support rod 603 to slide on the slide rail 605 installed on the anti-torsion fixing frame 601. At the same time, when the torque loading mechanism 500 applies torque to the third connecting section of the torsion bar 400, the limiter 606 connected to the slide rail 605 can limit the sliding of the slider 604 relative to the slide rail 605. By setting the slider 604 and the slide rail 605, when the torque loading mechanism 500 applies torque to the third connecting section of the torsion bar 400, the force on the support rod 603 can be buffered, so as to avoid the support rod 603 from being subjected to a large instantaneous torsional force in a short time, resulting in the fracture of the support rod 603 before the preset value of the experiment is reached, which is conducive to improving the experimental effect. Among them, the specific type of the slide rail 605 is not limited, and can be reasonably selected according to the actual application requirements. For example, it can be a linear slide rail 605 or a curved slide rail 605. By setting the limiter 606, the support rod 603 can be quickly limited, and the installation speed of the testing machine can be improved. The specific structure and installation position of the limiter 606 are not limited, and can be reasonably selected according to the actual application requirements. For example, the limiter 606 can be a boss structure, a baffle structure, a snap-on structure, etc.; the limiter 606 can be directly installed on the slide rail 605, or it can be set between the anti-torsion fixed frame 601 and the slide rail 605. The specific number of the slide rail 605, the slider 604, the limiter 606 and the support rod 603 is not limited, and can be reasonably selected according to the actual application requirements. For example, the number of the slide rail 605, the slider 604, the limiter 606 and the support rod 603 can be the same or different; the number of the slide rail 605, the slider 604, the limiter 606 and the support rod 603 can all be one, or two, three, etc.

[0089] Furthermore, in order to simplify the structure of the impact torsion testing machine, and at the same time better support other components, and the supporting effect is relatively stable, the slide rail 605 is set as a linear slide rail, the slide rail 605 is set along the second direction, and the support rod 603 is set along the third direction; the first direction, the second direction and the third direction are perpendicular to each other.

[0090] Further Figure 3 As shown, in order to improve the connection effect between the support rod 603 and the anti-torsion fixing frame 601, the number of the sliding rails 605, the slider 604, the limit members 606 and the support rod 603 are all two; before the support rod 603 breaks, the two sliding rails 605, the two sliders 604, the two limit members 606 and the two support rods 603 are respectively distributed in a mirror-symmetrical manner relative to the axis of the second connecting section.

[0091] Furthermore, in order to simplify the structure of the impact type torsion testing machine and improve the stability of the limiter 606 , the limiter 606 may be a boss structure, and the limiter 606 is installed between the slide rail 605 and the anti-torsion fixing frame 601 .

[0092] Furthermore, if Figure 3 As shown, in order to more stably fix the anti-torsion ring 602 and facilitate the selection of materials and size design of the support rod 603 according to the preset values ​​of the experiment, the outer circumference of the anti-torsion ring 602 is cylindrical; the number of support rods 603 is multiple, and the shape and size are the same; the multiple support rods 603 are evenly arranged on the outer circumference of the anti-torsion ring 602.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An impact torsion testing machine, characterized in that: The impact torsion testing machine comprises a first support, a second support, an incident rod, a torsion bar, a torque loading mechanism, a torque control mechanism, an axial pressure loading mechanism and a thrust bearing; wherein the torsion bar comprises a first connecting section, a second connecting section and a third connecting section which are sequentially connected along a first direction; Along the first direction, the first end of the incident rod faces the first support, and the first end of the incident rod and the first support are used to clamp the sample together; The second end of the incident rod is connected to the first end of the first connecting segment; the first end of the second connecting segment is connected to the second end of the first connecting segment, and the second end of the second connecting segment is connected to the first end of the third connecting segment; the second end of the third connecting segment is connected to the torque loading mechanism; The second support has a first mounting hole, and the third connecting section is arranged through the first mounting hole; the thrust bearing is sleeved on the outer circumferential surface of the third connecting section, and the thrust bearing is installed between the second end of the second connecting section and the second support; The axial pressure loading mechanism is connected to the second connecting section, and is used to apply a thrust along the first direction to the second connecting section, so that the second connecting section and the second support jointly clamp the thrust bearing; The torque control mechanism is connected to the second connecting segment; the torque control mechanism is used to limit the rotation of the second connecting segment when the torque applied by the torque loading mechanism to the third connecting segment does not reach the experimental preset value; and is used to release the rotation restriction on the second connecting segment when the torque applied by the torque loading mechanism to the third connecting segment reaches the experimental preset value; The thrust cylinder of the axial pressure loading mechanism is installed on the first support, and is respectively arranged at two ends of the impact type torsion testing machine along the first direction with the torque loading mechanism; The torque control mechanism includes an anti-torsion fixing frame, an anti-torsion ring, a support rod, a sliding block connected in a sliding manner, a slide rail, and a limiter for limiting the movement of the sliding block, and the anti-torsion ring is installed on the anti-torsion fixing frame through the support rod; The slider is fixedly connected to the first end of the support rod, and the second end of the support rod is fixedly connected to the anti-torsion ring; the slide rail is installed on the anti-torsion fixing frame; the limiter is connected to the slide rail; the limiter is used to limit the sliding of the slider relative to the slide rail when the torque loading mechanism applies torque to the third connecting section.

2. The impact torsion testing machine according to claim 1, characterized in that: The incident rod is a hollow rod, and the torsion rod is a solid rod; the incident rod has a second mounting hole, the first end of the first connecting section is embedded in the second mounting hole, and the outer wall of the first end of the first connecting section is in contact with the hole wall of the second mounting hole.

3. The impact type torsion testing machine according to claim 2, characterized in that: The torque loading mechanism is provided with a third mounting hole, the second end of the third connecting section is embedded in the third mounting hole, and the outer wall of the second end of the third connecting section is in contact with the hole wall of the third mounting hole.

4. The impact type torsion testing machine according to claim 3, characterized in that: The first connecting section and the third connecting section are both polyhedral structures.

5. The impact type torsion testing machine according to claim 4, characterized in that: A cross-sectional area of ​​the third connecting segment is greater than a cross-sectional area of ​​the first connecting segment.

6. The impact torsion testing machine according to claim 1, characterized in that: The impact torsion testing machine also includes a base; the axial pressure loading mechanism includes a thrust cylinder and a thrust transmission component; wherein, The first support, the second support, the torque control mechanism and the torque loading mechanism are all mounted on the base; The thrust transmission component connects the thrust cylinder and the second connecting section, and is used for transmitting the thrust generated by the thrust cylinder to the second connecting section; the thrust cylinder is installed on the first support.

7. The impact torsion testing machine according to claim 1, characterized in that: The anti-torsion ring is sleeved on the outside of the second connecting section and is detachably connected to the second connecting section; When the torque applied by the torque loading mechanism to the third connecting segment reaches the experimental preset value, the support rod breaks to release the rotation restriction on the second connecting segment.

8. The impact torsion testing machine according to claim 1, characterized in that: The slide rail is a linear slide rail, the slide rail is arranged along the second direction, and the support rod is arranged along the third direction; the first direction, the second direction and the third direction are perpendicular to each other.

9. The impact type torsion testing machine according to claim 7, characterized in that: The outer circumferential surface of the anti-torsion ring is cylindrical; the number of the support rods is multiple, and the shapes and sizes are the same; the multiple support rods are evenly arranged on the outer circumferential surface of the anti-torsion ring.

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