A torsion test device for transient release of torsion force

Abstract

The present invention relates to the technical field of mechanical experimental devices, and in particular to a torsion experimental device for instantaneous torsion release, comprising a reaction seat, an incident rod, a torsion bar, an anti-torsion fixing mechanism, a torque control rod and a torque loading mechanism, wherein along the length direction, the first end of the incident rod faces the reaction seat, and the first end of the incident rod and the reaction seat are used to clamp a sample together; the second end of the incident rod is connected to the first end of the torsion bar, the second end of the torsion bar is connected to the first end of the torque control rod, and the second end of the torque control rod is connected to the torque loading mechanism; the anti-torsion fixing mechanism is sleeved on the torsion bar, and the anti-torsion fixing mechanism is used to limit the torsion bar from rotating along a first rotation direction; when the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the torque control rod breaks, the torsion bar rotates along a second rotation direction opposite to the first rotation direction, and transmits the torque to the incident rod, so as to improve the structural stability of the torsion experimental device for instantaneous torsion release.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical experimental devices, in particular to a torsion experimental device for transiently releasing torsion force. Background Art

[0002] The torsion test device is a device that can be used to measure the shear modulus of a material. It usually consists of a long rod and a sturdy bracket. During the measurement, the test specimen is clamped on two fixed fixtures and a torsion force is applied by rotating the rod. According to the principles of elasticity and geometry, the shear modulus of the material can be calculated. The shear modulus of solid materials and viscous liquids can be measured using the torsion test device, and the instrument is widely used in chemistry, mechanics, geology and other fields.

[0003] In the prior art, due to limitations such as the structure and material of the experimental device, the traditional torsion experimental device has problems such as complex assembly of the experimental device, the incident rod requires an additional clamping device, and the experimental results have low accuracy. Summary of the invention

[0004] In order to solve the problems of the traditional torsion test device, such as the complicated assembly of the test device, the need for an additional clamping device for the incident rod, and the low accuracy of the experimental results, the present invention provides a torsion test device for transient release of torsion force, the torsion test device for transient release of torsion force comprises a reaction seat, an incident rod, a torsion bar, an anti-torsion fixing mechanism, a torque control rod and a torque loading mechanism, wherein:

[0005] Along the length direction, the first end of the incident rod faces the reaction seat, and the first end of the incident rod and the reaction seat are used to clamp the sample together; the second end of the incident rod is connected to the first end of the torsion bar, the second end of the torsion bar is connected to the first end of the torque control rod, and the second end of the torque control rod is connected to the torque loading mechanism;

[0006] The anti-torsion fixing mechanism is sleeved on the torsion bar, and the anti-torsion fixing mechanism is used to limit the torsion bar from rotating along a first rotation direction;

[0007] When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the torque control rod breaks, the torsion bar rotates along a second rotation direction opposite to the first rotation direction and transmits the torque to the incident rod.

[0008] In some embodiments, the torsion test device for transiently releasing torsional force also includes an axial pressure loading mechanism mounted on the torsion bar, and along the length direction, the axial pressure loading mechanism is located between the incident rod and the anti-torsion fixing mechanism; the axial pressure loading mechanism is used to apply a thrust to the torsion bar along the length direction.

[0009] In some embodiments, the axial pressure loading mechanism includes a thrust bearing, a ball screw pair, and a first motor;

[0010] The thrust bearing is sleeved on the outer circumferential surface of the torsion bar, and the thrust bearing is connected to the output shaft of the first motor through the ball screw pair; when the output shaft of the first motor rotates, the ball screw pair applies thrust along the length direction to the thrust bearing.

[0011] In some embodiments, the torque control rod comprises a first connecting segment, a second connecting segment and a third connecting segment which are sequentially connected along the length direction, wherein two ends of the first connecting segment are respectively connected to the torsion bar and the second connecting segment, and two ends of the third connecting segment are respectively connected to the second connecting segment and the torque loading mechanism; the second connecting segment is a cylinder, and the cross-sectional area of ​​the second connecting segment is smaller than the cross-sectional areas of the first connecting segment and the third connecting segment;

[0012] When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the second connecting section breaks, the torque value transmitted to the incident rod is determined by the following formula:

[0013]

[0014] Wherein, T is the torque value transmitted to the incident rod; θ is the torsion angle of the second connecting segment; G is the material shear modulus of the second connecting segment; D is the diameter of the second connecting segment; L is the length of the second connecting segment; J is the polarization coefficient, and k1, k2, k3, and k4 are all empirical coefficients.

[0015] In some embodiments, the torsion bar includes a fourth connecting segment, a fifth connecting segment and a sixth connecting segment sequentially connected along the length direction, wherein two ends of the fourth connecting segment are respectively connected to the incident bar and the fifth connecting segment, and two ends of the sixth connecting segment are respectively connected to the fifth connecting segment and the first connecting segment;

[0016] The fifth connecting segment is a cylinder, the ratio of the diameters of the second connecting segment to the fifth connecting segment is greater than or equal to 0.2 and less than or equal to 0.3; the ratio of the length to the diameter of the second connecting segment is greater than or equal to 5 and less than or equal to 6; the value of k3 is greater than or equal to 0.1 and less than or equal to 0.2; the value of k1 is greater than or equal to 0.4 and less than or equal to 0.6.

[0017] In some embodiments, the incident rod is a hollow rod and the torsion rod is a solid rod;

[0018] The torsion rod includes a fourth connecting segment, a fifth connecting segment and a sixth connecting segment which are connected in sequence along the length direction; the first end of the fourth connecting segment is embedded in the second end of the incident rod; the two ends of the sixth connecting segment are respectively connected to the fifth connecting segment and the first end of the torque control rod.

[0019] In some embodiments, the torque loading mechanism includes a second motor, an output shaft of the second motor is connected to the second end of the torque control rod; the second motor is used to apply torque to the torque control rod along the first rotation direction.

[0020] In some embodiments, the anti-torsion fixing mechanism includes an anti-torsion fixing frame, a first clamping member and a second clamping member; wherein,

[0021] The first clamping member and the second clamping member are both mounted on the anti-torsion fixing frame, the first clamping member and the second clamping member are movably connected and enclosed to form a clamping hole, and the torsion rod is arranged through the clamping hole;

[0022] When the torque control rod rotates along the first rotation direction, the first clamping member and the second clamping member jointly restrict the torsion bar from rotating along the first rotation direction;

[0023] When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the torque control rod breaks, the torsion bar drives the first clamping member and the second clamping member to rotate along the second rotation direction to increase the cross-section of the clamping hole.

[0024] In some embodiments, the anti-torsion fixing mechanism further includes a first slider, a first slide rail, a second slider and a second slide rail; wherein,

[0025] The first slider is slidably connected to the first slide rail, the second slider is slidably connected to the second slide rail, the first slide rail and the second slide rail are both installed on the anti-torsion fixed frame, the first slider is fixedly connected to the first clamping member, and the second slider is fixedly connected to the second clamping member.

[0026] In some embodiments, the anti-torsion fixing mechanism further includes a first limiter and a second limiter; wherein,

[0027] The first limit member is connected to the first slide rail, and the second limit member is connected to the second slide rail; the first limit member and the second limit member are used to limit the first slider from sliding relative to the first slide rail, and limit the second slider from sliding relative to the second slide rail when the torque control rod rotates along the first rotation direction.

[0028] The torsion test device for instantaneous torsion release provided by the present invention connects the torsion bar and the torque loading mechanism through a torque control rod, which can simplify the connection structure of the torsion test device for instantaneous torsion release. At the same time, the torque control rod is located at the end of the torsion test device for instantaneous torsion release. Compared with the traditional torsion test device, the operation of installing the torque control rod is simpler and the installation efficiency is higher. At the same time, the weight of the torsion test device for instantaneous torsion release is balanced, so that the structure of the torsion test device for instantaneous torsion release can be optimized, the stability of the torsion test device for instantaneous torsion release is improved, and the accuracy of the measurement result is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A partial cross-sectional view from a first perspective of a torsion test device for transiently releasing torsional force provided in an embodiment of the present application is shown;

[0030] Figure 2 A partial cross-sectional view from a second perspective of a torsion test device for transiently releasing torsion force provided in an embodiment of the present application is shown;

[0031] Figure 3 for Figure 1 A cross-sectional view in the 1-1 direction of a torsion test device for transiently releasing torsional force provided in an embodiment of the present application is shown.

[0032] Figure numerals: 100 reaction seat, 200 incident rod, 300 torsion bar, 400 anti-torsion fixing mechanism, 401 anti-torsion fixing frame, 402 first clamping member, 403 second clamping member, 404 first slider, 405 first slide rail, 406 second slider, 407 second slide rail, 408 first limit member, 409 second limit member, 500 torque control rod, 600 torque loading mechanism, 601 second motor, 700 axial pressure loading mechanism, 701 thrust bearing, 702 ball screw pair, 703 first motor, 800 sample. DETAILED DESCRIPTION

[0033] 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.

[0034] 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."

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] This embodiment discloses a torsion test device for transient release of torsion force, such as Figure 1 and Figure 2 As shown, the torsion test device for transiently releasing torsional force includes a reaction seat 100, an incident rod 200, a torsion bar 300, an anti-torsion fixing mechanism 400, a torque control rod 500 and a torque loading mechanism 600, wherein, along the length direction, the first end of the incident rod 200 faces the reaction seat 100, and the first end of the incident rod 200 and the reaction seat 100 are used to jointly clamp the sample 800; the second end of the incident rod 200 is connected to the first end of the torsion bar 300, the second end of the torsion bar 300 is connected to the first end of the torque control rod 500, and the second end of the torque control rod 500 is connected to the torque loading mechanism 600.

[0040] The anti-torsion fixing mechanism 400 is sleeved on the torsion bar 300 , and the anti-torsion fixing mechanism 400 is used to limit the torsion bar 300 from rotating along the first rotation direction.

[0041] When the torque loading mechanism 600 applies torque to the torque control rod 500 along the first rotation direction until the torque control rod 500 breaks, the torsion bar 300 rotates along the second rotation direction opposite to the first rotation direction and transmits the torque to the incident rod 200 .

[0042] In this embodiment, the reaction seat 100 is used to clamp the sample 800 together with the first end of the incident rod 200, and bear the torque of the incident rod 200, which can prevent the sample 800 from shifting during the experiment. The specific structure of the reaction seat 100 is not limited and can be reasonably selected according to actual application requirements.

[0043] In this embodiment, the incident rod 200 is used to clamp the sample 800 together with the reaction seat 100 and transmit the torque of the torsion bar 300 to the sample 800. The specific structural form is not limited and can be reasonably selected according to actual application requirements. For example, the incident rod 200 can be a hollow rod or a solid rod.

[0044] In this embodiment, the torsion bar 300 is used to transmit the torque of the torque control rod 500. The specific structure is not limited and can be reasonably selected according to actual application requirements. For example, the torsion bar 300 can be a hollow bar or a solid bar.

[0045] In this embodiment, the anti-torsion fixing mechanism 400 is used to limit the rotation of the torsion bar 300 along the first rotation direction. 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, etc.

[0046] In this embodiment, the torque control rod 500 is used to transmit the torque of the torque loading mechanism 600 to the torsion bar 300. At the same time, the rotation restriction of the torsion bar 300 is released by breaking the torque control rod 500, so that the torsion bar 300 rotates in a second rotation direction opposite to the first rotation direction.

[0047] In this embodiment, the torque loading mechanism 600 is used to apply torque along the first rotation direction to the torque control rod 500, and the specific structure is not limited and can be reasonably selected according to actual application requirements. For example, it can be a servo motor, a hydraulic pump, a motor, etc.

[0048] In this embodiment, when the torsion test device for transiently releasing torsion force is used for the experiment, first, the incident rod 200 is moved along the length direction to clamp the sample 800 between the first end of the incident rod 200 and the reaction seat 100, the second end of the incident rod 200 is connected to the first end of the torsion bar 300, the second end of the torsion bar 300 is connected to the first end of the torque control rod 500, the second end of the torque control rod 500 is connected to the torque loading mechanism 600, and the anti-torsion fixing mechanism 400 is sleeved on the torsion bar 300; then, the torque loading mechanism 600 is used to apply torque to the torque control rod 500 along the first rotation direction, the torque control rod 500 drives the torsion bar 300 to rotate along the first rotation direction, and the anti-torsion fixing mechanism 400 limits the rotation of the torsion bar 300, so that the torsion bar 300 undergoes elastic deformation to store torque. The torque applied by the loading mechanism 600; finally, when the torque applied to the torsion bar 300 does not reach the preset value of the experiment, the torque control rod 500 does not break, and the torsion bar 300 continues to store the torque applied by the torque loading mechanism 600. When the torque applied to the torsion bar 300 reaches the preset value of the experiment, the torque loading mechanism 600 applies torque to the torque control rod 500 along a first rotation direction until the torque control rod 500 breaks, the anti-torsion fixing mechanism 400 releases the rotation restriction of the torsion bar 300, and the torsion bar 300 rotates to release the stored torque, and the torsion bar 300 rotates in a second rotation direction opposite to the first rotation direction, and the torsion bar 300 rotates to transfer the torque to the incident rod 200, and the incident rod 200 transfers the torque to the sample 800 between the incident rod 200 and the reaction seat 100, thereby completing the torsion experiment of transient release of torsion force.

[0049] In this embodiment, the connection structure of the torsion test device for instantaneous torsion release can be simplified by connecting the torsion bar 300 and the torque loading mechanism 600 through the torque control rod 500. At the same time, the torque control rod 500 is located at the end of the torsion test device for instantaneous torsion release. Compared with the traditional torsion test device, the operation of installing the torque control rod 500 is simpler and the installation efficiency is higher. At the same time, the weight of the torsion test device for instantaneous torsion release is balanced, so that the structure of the torsion test device for instantaneous torsion release can be optimized and the stability of the torsion test device for instantaneous torsion release can be improved.

[0050] Alternatively, if Figure 1 and Figure 2 As shown, the torsion test device for transiently releasing torsional force also includes an axial pressure loading mechanism 700 mounted on the torsion bar 300. Along the length direction, the axial pressure loading mechanism 700 is located between the incident rod 200 and the anti-torsion fixing mechanism 400; the axial pressure loading mechanism 700 is used to apply a thrust along the length direction to the torsion bar 300.

[0051] In this embodiment, the axial pressure loading mechanism 700 is used to apply thrust along the length direction to the torsion bar 300. The specific structure is not limited and can be reasonably selected according to actual application requirements. For example, the axial pressure loading mechanism 700 can be a hydraulic cylinder, a thrust cylinder, a cylinder, a thrust bearing, etc.

[0052] In this embodiment, by setting the axial pressure loading mechanism 700 between the incident rod 200 and the torque fixing mechanism, axial pressure and torque can be applied to the torsion bar 300 at the same time, which is beneficial to improving the effect of mechanical experiments using a torsion test device that releases torsional force in a transient manner.

[0053] Furthermore, if Figure 2 As shown, the axial pressure loading mechanism 700 includes a thrust bearing 701 , a ball screw pair 702 and a first motor 703 .

[0054] The thrust bearing 701 is sleeved on the outer circumference of the torsion bar 300 , and the thrust bearing 701 is connected to the output shaft of the first motor 703 through the ball screw pair 702 ; when the output shaft of the first motor 703 rotates, the ball screw pair 702 applies thrust along the length direction to the thrust bearing 701 .

[0055] In this embodiment, by controlling the force of the thrust bearing 701, the thrust bearing 701 can not only store the thrust transmitted by the first motor 703 through the ball screw pair 702, but also release the thrust stored in the thrust bearing 701. The specific structure of the thrust bearing 701 is not limited and can be reasonably selected according to actual application requirements. For example, the thrust bearing 701 can be composed of one or more rolling elements and one or more retaining frames, and the rolling elements roll in the retaining frames to bear the axial load.

[0056] Furthermore, in order to ensure that the sample 800 remains stable when the torsion bar 300 is twisted, and to ensure that the sample 800 does not displace or deform during the twisting process, thereby ensuring the accuracy of the test results, the thrust bearing 701 is sleeved on the outer circumferential surface of the end of the torsion bar 300 away from the incident rod 200, and the thrust released by the thrust bearing 701 is transmitted to the sample 800 through the torsion bar 300 and the incident rod 200.

[0057] In this embodiment, the ball screw pair 702 may include a nut and a screw, which are threadedly connected to each other. The screw is arranged along the length direction. The motor drives the nut to rotate relative to the screw, so that the nut moves along the length direction and applies axial pressure along the length direction to the thrust bearing 701.

[0058] In this embodiment, the ball screw pair 702 is connected to the output shaft of the first motor 703. The specific connection method is not limited and can be reasonably selected according to actual application requirements. For example, the output shaft of the motor can be directly connected to the ball screw pair 702, or indirectly connected to the ball screw pair 702 through a reducer, a synchronous pulley, a transmission belt, etc.

[0059] Alternatively, if Figure 1 and Figure 2 As shown, in order to more accurately calculate the torque value loaded on the sample 800, the torque control rod 500 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 the length direction, wherein two ends of the first connecting section are respectively connected to the torsion bar 300 and the second connecting section, and two ends of the third connecting section are respectively connected to the second connecting section and the torque loading mechanism 600; the second connecting section is a cylinder, and the cross-sectional area of ​​the second connecting section is smaller than the cross-sectional areas of the first connecting section and the third connecting section.

[0060] When the torque loading mechanism 600 applies torque to the torque control rod 500 along the first rotation direction until the second connection section breaks, the torque value transmitted to the incident rod 200 is determined by the following formula:

[0061]

[0062] Wherein, T is the torque value transmitted to the incident rod 200; θ is the torsion angle of the second connecting section; G is the material shear modulus of the second connecting section; D is the diameter of the second connecting section; L is the length of the second connecting section; J is the polarization coefficient, and k1, k2, k3, and k4 are all empirical coefficients.

[0063] In this embodiment, k1, k2, k3, and k4 are all empirical coefficients, and the specific empirical coefficients are not limited in value and can be reasonably selected according to actual application requirements. For example: the value of k3 is greater than or equal to 0.05 and less than or equal to 0.25; the value of k1 is greater than or equal to 0.35 and less than or equal to 0.65; the value of k4 is greater than or equal to 0.1 and less than or equal to 0.3; the value of k2 is greater than or equal to 0.7 and less than or equal to 1.2.

[0064] Furthermore, if Figure 1 and Figure 2As shown, in order to better eliminate the influence of different materials on the diameter of the second connecting section of the torque control rod 500 and eliminate the aspect ratio limitation while meeting the design requirements, the torsion bar 300 includes a fourth connecting section (not shown), a fifth connecting section (not shown) and a sixth connecting section (not shown) which are sequentially connected along the length direction, wherein two ends of the fourth connecting section are respectively connected to the incident rod 200 and the fifth connecting section, and two ends of the sixth connecting section are respectively connected to the fifth connecting section and the first connecting section.

[0065] The fifth connecting segment is a cylinder, the ratio of the diameters of the second connecting segment to the fifth connecting segment is greater than or equal to 0.2 and less than or equal to 0.3; the ratio of the length to the diameter of the second connecting segment is greater than or equal to 5 and less than or equal to 6; the value of k3 is greater than or equal to 0.1 and less than or equal to 0.2; the value of k1 is greater than or equal to 0.4 and less than or equal to 0.6.

[0066] Furthermore, in order to better reduce the absolute influence of the diameter of the second connecting section of the torque control rod 500 on the polarization coefficient, the value of k4 is greater than or equal to 0.15 and less than or equal to 0.25.

[0067] Furthermore, in order to better control the difference in shear modulus of different materials, the value of k2 is greater than or equal to 0.8 and less than or equal to 1.0.

[0068] Alternatively, if Figure 1 and Figure 2 As shown, the incident rod 200 is a hollow rod, and the torsion rod 300 is a solid rod; the torsion rod 300 includes a fourth connecting segment, a fifth connecting segment, and a sixth connecting segment connected in sequence along the length direction; the first end of the fourth connecting segment is embedded in the second end of the incident rod 200; the two ends of the sixth connecting segment are respectively connected to the fifth connecting segment and the first end of the torque control rod 500. In this embodiment, by setting the incident rod 200 as a hollow rod, the amount of material used in the torsion test device for transient release of torsion force can be reduced, and the weight can be reduced while saving costs. By setting the torsion rod 300 as a solid rod, the strength of the torsion rod 300 can be enhanced, and the maximum load value of the torsion rod 300 can be increased.

[0069] In this embodiment, in order to realize the detachable connection between the torsion bar 300 and the incident rod 200, and facilitate the assembly of the torsion experimental device for transient release of torsion force, the first end of the fourth connection section of the torsion bar 300 is embedded in the second end of the incident rod 200. The specific embedding method of the torsion bar 300 and the incident rod 200 is not limited, and can be reasonably selected according to actual application requirements. For example, it can be a threaded connection or a clamping connection.

[0070] In this embodiment, the specific cross-sectional outer edge shapes and sizes of the torsion bar 300 and the incident rod 200 are not limited and can be reasonably selected according to actual application requirements. For example, the cross-sectional outer edge shapes and sizes of the torsion bar 300 and the incident rod 200 are the same or different.

[0071] Furthermore, if Figure 1 and Figure 2 As shown, in order to better transmit torque and axial force, the outer edge of the cross section of the fifth connecting section of the torsion bar 300 has the same shape and size as the outer edge of the cross section of the incident rod 200 .

[0072] Alternatively, if Figure 2 As shown, in order to facilitate the control and calculation of the torque loading amount, the torque loading mechanism 600 includes a second motor 601, and the output shaft of the second motor 601 is connected to the second end of the torque control rod 500; the second motor 601 is used to apply torque to the torque control rod 500 along the first rotation direction.

[0073] In this embodiment, the torque control rod 500 is connected to the output shaft of the second motor 601. The specific connection method is not limited and can be reasonably selected according to actual application requirements. For example, the output shaft of the motor can be directly connected to the torque control rod 500, or can be connected to the torque control rod 500 through a reducer, a synchronous pulley, a transmission belt, etc.

[0074] Alternatively, if Figure 3 As shown, the anti-torsion fixing mechanism 400 includes an anti-torsion fixing frame 401, a first clamping member 402 and a second clamping member 403; wherein the first clamping member 402 and the second clamping member 403 are both installed on the anti-torsion fixing frame 401, and the first clamping member 402 and the second clamping member 403 are movably connected and enclosed to form a clamping hole, and the torsion rod 300 is arranged through the clamping hole.

[0075] When the torque control rod 500 rotates along the first rotation direction, the first clamping member 402 and the second clamping member 403 jointly restrict the torsion bar 300 from rotating along the first rotation direction.

[0076] When the torque loading mechanism 600 applies torque to the torque control rod 500 along the first rotation direction until the torque control rod 500 breaks, the torsion bar 300 drives the first clamping member 402 and the second clamping member 403 to rotate along the second rotation direction to increase the cross-section of the clamping hole.

[0077] In this embodiment, the anti-torsion fixing frame 401 is used to withstand the reaction force when the torsion bar 300 is loaded, preventing the torsion bar 300 clamped by the first clamping member 402 and the second clamping member 403 from rotating along the first rotation direction, thereby ensuring the accuracy of the experimental results.

[0078] In this embodiment, the first clamping member 402 and the second clamping member 403 are movably connected, and the specific movably connected manner is not limited and can be reasonably selected according to actual application requirements. For example, the movably connected manner can be threaded connection, clamping connection, bolt connection, etc.

[0079] In this embodiment, when the torque control rod 500 rotates along the first rotation direction, the first clamping member 402 and the second clamping member 403 jointly restrict the torsion bar 300 from rotating along the first rotation direction; before the torque control rod 500 breaks, the two clamping members jointly restrict the torsion bar 300 from rotating; when the torque loading mechanism 600 applies torque to the torque control rod 500 along the first rotation direction until the torque control rod 500 breaks, due to the contact between the torsion bar 300 and the two clamping members and the friction generated when the two move, the torsion bar 300 drives The first clamping member 402 and the second clamping member 403 rotate along the second rotation direction. Due to the rotation, the first clamping member 402 and the second clamping member 403 generate centrifugal force to move away from the torsion bar 300, and the cross-section of the clamping hole enclosed by the first clamping member 402 and the second clamping member 403 increases. The friction between the two clamping members and the torsion bar 300 is reduced or even no longer in contact, and the rotation restriction of the torsion bar 300 by the first clamping member 402 and the second clamping member 403 can be released, so that the torque can be transmitted to the incident rod 200 through the torsion bar 300.

[0080] Furthermore, if Figure 3 As shown, in order to improve the stability of the movement of the two clamping members and to prevent the two clamping members from falling off after being disconnected and interfering with the experiment, the anti-torsion fixing mechanism 400 also includes a first slider 404, a first slide rail 405, a second slider 406 and a second slide rail 407; wherein the first slider 404 and the first slide rail 405 are slidably connected, the second slider 406 and the second slide rail 407 are slidably connected, the first slide rail 405 and the second slide rail 407 are both installed on the anti-torsion fixing frame 401, the first slider 404 is fixedly connected to the first clamping member 402, and the second slider 406 is fixedly connected to the second clamping member 403.

[0081] Furthermore, if Figure 3 As shown, in order to prevent the connection part between the slider and the clamping member from being damaged due to excessive torsional force, the slider cannot slide relative to the slide rail along the first rotation direction, and the first clamping member 402 and the second clamping member 403 cannot move along the first rotation direction. The anti-torsion fixing mechanism 400 also includes a first limit member 408 and a second limit member 409; wherein the first limit member 408 is connected to the first slide rail 405, and the second limit member 409 is connected to the second slide rail 407; the first limit member 408 and the second limit member 409 are used to limit the first slider 404 from sliding relative to the first slide rail 405, and limit the second slider 406 from sliding relative to the second slide rail 407 when the torque control rod 500 rotates along the first rotation direction.

[0082] Furthermore, if Figure 3 As shown, in order to simplify the structure of the torsion test device for instantaneous release of torsion force and make the torsion test device for instantaneous release of torsion force more stable, the first limit member 408 and the second limit member 409 are both boss structures and are both installed between the slide rail and the anti-torsion fixing frame 401.

[0083] 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. A torsion test device for transient release of torsion force, characterized in that: The torsion test device for transiently releasing torsion force comprises a reaction seat, an incident rod, a torsion rod, an anti-torsion fixing mechanism, a torque control rod and a torque loading mechanism, wherein: Along the length direction, the first end of the incident rod faces the reaction seat, and the first end of the incident rod and the reaction seat are used to clamp the sample together; the second end of the incident rod is connected to the first end of the torsion bar, the second end of the torsion bar is connected to the first end of the torque control rod, and the second end of the torque control rod is connected to the torque loading mechanism; The anti-torsion fixing mechanism is sleeved on the torsion bar, and the anti-torsion fixing mechanism is used to limit the torsion bar from rotating along a first rotation direction; When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the torque control rod breaks, the torsion bar rotates along a second rotation direction opposite to the first rotation direction and transmits the torque to the incident rod; The torque control rod comprises a first connecting section, a second connecting section and a third connecting section which are sequentially connected along the length direction, wherein two ends of the first connecting section are respectively connected to the torsion bar and the second connecting section, and two ends of the third connecting section are respectively connected to the second connecting section and the torque loading mechanism; the second connecting section is a cylinder, and the cross-sectional area of ​​the second connecting section is smaller than the cross-sectional areas of the first connecting section and the third connecting section; When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the second connecting section breaks, the torque value transmitted to the incident rod is determined by the following formula: Wherein, T is the torque value transmitted to the incident rod; θ is the torsion angle of the second connecting segment; G is the material shear modulus of the second connecting segment; D is the diameter of the second connecting segment; L is the length of the second connecting segment; J is the polarization coefficient, and k1, k2, k3, and k4 are all empirical coefficients.

2. The torsion test device for transient release of torsion force according to claim 1, characterized in that: The torsion test device for transiently releasing torsional force also includes an axial pressure loading mechanism mounted on the torsion bar, and along the length direction, the axial pressure loading mechanism is located between the incident rod and the anti-torsion fixing mechanism; the axial pressure loading mechanism is used to apply a thrust to the torsion bar along the length direction.

3. The torsion test device for transient release of torsion force according to claim 2, characterized in that: The axial pressure loading mechanism includes a thrust bearing, a ball screw pair and a first motor; The thrust bearing is sleeved on the outer circumferential surface of the torsion bar, and the thrust bearing is connected to the output shaft of the first motor through the ball screw pair; when the output shaft of the first motor rotates, the ball screw pair applies thrust along the length direction to the thrust bearing.

4. The torsion test device for transient release of torsion force according to claim 1, characterized in that: The torsion bar comprises a fourth connecting segment, a fifth connecting segment and a sixth connecting segment which are sequentially connected along the length direction, wherein two ends of the fourth connecting segment are respectively connected to the incident bar and the fifth connecting segment, and two ends of the sixth connecting segment are respectively connected to the fifth connecting segment and the first connecting segment; The fifth connecting segment is a cylinder, the ratio of the diameters of the second connecting segment to the fifth connecting segment is greater than or equal to 0.2 and less than or equal to 0.3; the ratio of the length to the diameter of the second connecting segment is greater than or equal to 5 and less than or equal to 6; the value of k3 is greater than or equal to 0.1 and less than or equal to 0.2; the value of k1 is greater than or equal to 0.4 and less than or equal to 0.

6.

5. The torsion test device for transient release of torsion force according to claim 1, characterized in that: The incident rod is a hollow rod, and the torsion rod is a solid rod; The torsion rod includes a fourth connecting segment, a fifth connecting segment and a sixth connecting segment which are connected in sequence along the length direction; the first end of the fourth connecting segment is embedded in the second end of the incident rod; the two ends of the sixth connecting segment are respectively connected to the fifth connecting segment and the first end of the torque control rod.

6. The torsion test device for transient release of torsion force according to claim 1, characterized in that: The torque loading mechanism comprises a second motor, the output shaft of the second motor is connected to the second end of the torque control rod; the second motor is used to apply torque to the torque control rod along the first rotation direction.

7. The torsion test device for transient release of torsion force according to claim 1, characterized in that: The anti-torsion fixing mechanism comprises an anti-torsion fixing frame, a first clamping member and a second clamping member; wherein, The first clamping member and the second clamping member are both mounted on the anti-torsion fixing frame, the first clamping member and the second clamping member are movably connected and enclosed to form a clamping hole, and the torsion rod is arranged through the clamping hole; When the torque control rod rotates along the first rotation direction, the first clamping member and the second clamping member jointly restrict the torsion bar from rotating along the first rotation direction; When the torque loading mechanism applies torque to the torque control rod along the first rotation direction until the torque control rod breaks, the torsion bar drives the first clamping member and the second clamping member to rotate along the second rotation direction to increase the cross-section of the clamping hole.

8. The torsion test device for transient release of torsion force according to claim 7, characterized in that: The anti-torsion fixing mechanism also includes a first slider, a first slide rail, a second slider and a second slide rail; wherein, The first slider is slidably connected to the first slide rail, the second slider is slidably connected to the second slide rail, the first slide rail and the second slide rail are both installed on the anti-torsion fixed frame, the first slider is fixedly connected to the first clamping member, and the second slider is fixedly connected to the second clamping member.

9. The torsion test device for transient release of torsion force according to claim 8, characterized in that: The anti-torsion fixing mechanism also includes a first limiter and a second limiter; wherein, The first limit member is connected to the first slide rail, and the second limit member is connected to the second slide rail; the first limit member and the second limit member are used to limit the first slider from sliding relative to the first slide rail, and limit the second slider from sliding relative to the second slide rail when the torque control rod rotates along the first rotation direction.

Images