A device for balancing the reaction force of a super-torque standard device acting on the ground

Abstract

The present application relates to a kind of super large torque standard device balance reaction force acting on the device of earth, including pedestal, installation mechanism, balance arm and standard arm;The upper end of pedestal is equipped with mounting bracket, mounting bracket both ends are equipped with connecting arm, the one end of connecting arm is equipped with the connecting mechanism that can be connected with the torque sensor to be measured, the other end is equipped with arm length adjusting mechanism, standard arm both ends are equipped with standard moment loading structure, the one end of torque sensor to be measured is generated torque by connecting arm using standard arm and standard moment loading structure when using the present application, arm length adjusting mechanism can adjust the length of force arm on the side of standard moment loading structure, so that the moment size of standard moment loading structure to torque sensor to be measured can be adjusted according to different force arm length;Balance tension mechanism can exert balance moment on diagonal position, the device of the present application can be realized as standard torque balance torque, ensure that machine tool body is not affected by torsion and deformed.

Description

Technical Field

[0001] This invention relates to the field of standard torque balancing technology, specifically to a device for balancing the reaction force acting on the ground using an ultra-large torque standard device. Background Technology

[0002] A static weight torque standard device is a high-precision torque measurement instrument. This device consists of a standard lever arm, standard weights, a lever arm support component, a machine tool body, and a balancing component. Traditionally, the balancing component is fixed to the machine tool and driven by a motor. However, this structure is not feasible for ultra-large static weight torque standard machines because existing motors cannot provide sufficient output torque to balance the extremely large standard torque generated by the standard lever arm weights. To solve this problem, a design technique is needed where the balancing reaction force acts on the ground, providing a sufficiently large balancing torque while ensuring that the machine tool body is not deformed by the torque. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a device for balancing the reaction force acting on the ground using an ultra-large torque standard device. This device can be used to balance the ultra-large standard torque generated by the standard lever arm weight; ensuring that the equipment is not deformed by the torque, and effectively guaranteeing the accuracy requirements of high-precision measuring devices.

[0004] The technical solution adopted in this invention is: a device for balancing the reaction force acting on the ground using a large torque standard device, comprising a base, a mounting mechanism, a balancing arm, and a standard arm; the upper end of the base is provided with a mounting frame, which is used to fix the torque sensor to be measured, and both ends of the mounting frame are provided with connecting arms, one end of the connecting arm is provided with a connecting mechanism that can be connected to the torque sensor to be measured, and the other end is provided with an arm length adjustment mechanism, the balancing arm and the standard arm are respectively horizontally mounted on one of the arm length adjustment mechanisms, the arm length adjustment mechanism can control the standard arm and the balancing arm to move in opposite directions, both ends of the standard arm are provided with standard torque loading structures, and a balancing tension mechanism is provided below the balancing arm, the standard torque loading structure and the balancing tension structure can be connected to the corresponding ends of the balancing arm and the standard arm, respectively, when the standard torque loading structure is connected to one end of the standard arm, the balancing tension mechanism is connected to the balancing arm, causing the connecting arm to rotate, which is used to balance the standard arm.

[0005] Furthermore, the mounting bracket includes an adjusting block and a fixing block arranged vertically. The adjusting block and the fixing block have oppositely arranged receiving grooves on their opposite sides. The inner wall of the receiving groove is provided with a protective pad. The measured torque sensor can be placed between the two receiving grooves. The adjusting block has fixing screws on both sides corresponding to the receiving grooves. The fixing screws pass through the adjusting block vertically, and the lower end of the fixing screws is screwed into the fixing block.

[0006] Furthermore, the connecting mechanism is located at the coupling near one end of the connecting arm and the mounting bracket. The coupling end is provided with a connecting claw, which can be fixedly connected to the torque sensor being measured.

[0007] Furthermore, the arm length adjustment mechanism includes an adjustment cylinder and a guide rail. The adjustment cylinder is fixed horizontally at the end of the two connecting arms away from the mounting frame and is perpendicular to the connecting arms. The guide rail is arranged around the inner wall of the adjustment cylinder along its length. The standard lever arm and the balance lever arm are inserted into the corresponding adjustment cylinder. The outer periphery of the standard lever arm and the balance lever arm is provided with guide grooves arranged along their length. The outer periphery of the adjustment cylinder is provided with an adjustment groove penetrating the inner wall of the adjustment cylinder above the standard lever arm or the balance lever arm. An adjustment gear is rotatably arranged in the adjustment groove. The adjustment gear meshes with a rack and pinion located on the outer periphery of the standard lever arm and the balance lever arm.

[0008] Furthermore, the outer side of the adjusting cylinder is provided with an adjusting turntable connected to the adjusting gear, and the outer side of the adjusting turntable is provided with a rotating handle; the outer periphery of the standard lever arm and the balancing lever arm is provided with an installation groove, the rack is fixed in the installation groove, and the installation groove is arranged along the longitudinal direction of the standard lever arm and the balancing lever arm.

[0009] Furthermore, the standard torque loading structure includes a standard weight, a weight base, a weight pan, and a lifting mechanism. The weight pan and weight base are arranged vertically, and the lifting mechanism is located at the geometric center of the upper end of the weight base. The lifting mechanism is driven by a vertically arranged lifting screw, and a lifting plate located below the weight pan is rotatably provided at the upper end of the lifting screw. The lifting plate can drive the weight pan to rise or fall. The standard weight has a conical positioning groove on its upper surface and a conical positioning pin on its lower surface. The standard weight also has a mounting groove arranged radially on its outer side. The width of the mounting groove is slightly larger than the diameter of the lifting screw, so that the standard weight can be arranged from top to bottom below the weight pan. It also includes several connecting pieces. The connecting pieces have connecting protrusions on their upper and lower outer sides, and the connecting protrusions can be fitted with connecting holes located on the outer periphery of the weight pan or the outer periphery of the standard weight.

[0010] Furthermore, the lifting mechanism includes a threaded sleeve located at the geometric center of the weight base and threadedly engaged with the lifting screw. The threaded sleeve is connected to the output end of a reducer located inside the weight base via a worm gear mechanism.

[0011] Furthermore, the lower end of the weight base is provided with a support frame, and the lower end of the support frame is provided with a support block arranged around the outer periphery of the weight base. The support block is screwed to the support frame, and a horizontally arranged bubble is also provided below the weight base.

[0012] Furthermore, the balancing tension mechanism includes a balancing base that can move along the longitudinal direction of the balancing arm. The balancing base is equipped with a worm gear reducer assembly that can be connected to the end of the balancing arm. The worm gear reducer assembly is signal-connected to a displacement sensor located on a standard arm. After a standard torque loading structure is applied to one end of the standard arm, the worm gear reducer assembly pulls one end of the balancing arm to bring the connecting arm into dynamic equilibrium.

[0013] Furthermore, an adjustment guide rail is provided below the balance base along the length of the balance arm, the lower end of the balance base is in rolling engagement with the adjustment guide rail, and a position sensor is provided at the upper end of the balance base, so that the worm gear pair reduction rod assembly can be moved to directly below the end of the balance arm. Additionally, fixed brackets that can be unfolded or folded are provided on both sides of the balance base.

[0014] The beneficial effects of this invention are as follows: During use, the measured torque sensor can be mounted on a mounting bracket on a base. One end of the measured torque sensor generates torque via a connecting arm using a standard lever arm and a standard torque loading structure. Since the standard lever arm can be adjusted via an arm length adjustment mechanism, the length of the lever arm on one side of the standard torque loading structure can be adjusted, thereby adjusting the torque applied to the measured torque sensor by the standard torque loading structure according to different lever arm lengths. A balancing tension mechanism is connected to the end of the balancing lever arm; by adjusting the length of the balancing lever arm as needed, a balancing torque is applied at the diagonal position of the standard weight. This device can provide a sufficiently large balancing torque for the standard torque while ensuring that the machine tool body is not deformed by the torque. It has high practical and promotional value. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the ultra-large torque standard device provided in this embodiment of the invention, which balances the reaction force acting on the ground.

[0016] Figure 2 A structural diagram of the arm length adjustment mechanism of the ultra-large torque standard device provided in this embodiment of the invention, which balances the reaction force acting on the ground;

[0017] Figure 3 A schematic diagram of the standard torque loading structure of the device for balancing the reaction force acting on the ground in the embodiment of the present invention;

[0018] Figure 4 A schematic diagram of the balancing tension mechanism of the device for balancing the reaction force acting on the ground in the ultra-large torque standard device provided in the embodiment of the present invention;

[0019] Reference numerals: Base 100, Balance arm 200, Standard arm 300, Mounting bracket 400, Measured torque sensor 500, Connecting arm 600, Arm length adjustment mechanism 700, Adjusting cylinder 710, Guide rail 720, Guide groove 730, Adjusting gear 740, Adjusting turntable 750, Standard torque loading structure 800, Standard weight 810, Weight base 820, Weight pan 830, Lifting screw 840, Lifting plate 850, Circular Conical positioning groove 811, conical positioning pin 812, mounting groove 813, connecting piece 860, threaded sleeve 870, support frame 880, level bubble 890, balancing tension mechanism 900, balancing base 910, worm gear pair reduction rod assembly 920, adjusting guide rail 930, position sensor 940, fixed bracket 950, coupling 1000, connecting claw 1100, rack 1200, adjusting block 1300, fixing screw 1400. Detailed Implementation

[0020] It should be noted that the functions and methods involved in this invention are merely conventional adaptations of existing technologies. Therefore, the improvement of existing technologies by this invention lies essentially in the connection relationships between hardware components, rather than in the functions or methods themselves. In other words, although this invention involves some functions and methods, it does not include any improvements to the functions or methods themselves. The descriptions of functions and methods in this invention are for the purpose of better illustrating and understanding this invention.

[0021] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore merely examples and should not be used to limit the scope of protection of the present invention. It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this invention pertains.

[0022] Example 1:

[0023] like Figures 1 to 4As shown in the figure, a specific embodiment of the present invention provides a device for balancing the reaction force acting on the ground using a large torque standard device, including a base 100, a mounting mechanism, a balancing arm 200, and a standard arm 300; the upper end of the base 100 is provided with a mounting bracket 400, which is used to fix the torque sensor 500 to be measured. The mounting bracket 400 has connecting arms 600 at both ends. One end of the connecting arm 600 is provided with a connecting mechanism that can be connected to the torque sensor 500 to be measured, and the other end is provided with an arm length adjustment mechanism 700. The balancing arm 200 and the standard arm 300 are respectively horizontally mounted on one of the arm length adjustment mechanisms 700. The arm length adjustment mechanism 700 can control the standard lever arm 300 and the balancing lever arm 200 to move in opposite directions. The standard lever arm 300 is provided with a standard torque loading structure 800 at both ends, and the balancing lever arm 200 is provided with a balancing tension mechanism 900 below it. The standard torque loading structure 800 and the balancing tension mechanism can be connected to one end of the balancing lever arm 200 and the standard lever arm 300, respectively. When the standard torque loading structure 800 is connected to one end of the standard lever arm 300, the balancing tension mechanism 900 is connected to the balancing lever arm 200, causing the connecting arm 600 to rotate, which is used to balance the standard lever arm 300.

[0024] In this embodiment, the torque sensor 500 can be mounted on the mounting bracket 400 of the base 100. During torque testing, both ends of the torque sensor 500 are connected to the connecting arm 600 through a connecting mechanism. One end of the torque sensor 500 generates torque through the connecting arm 600 using the standard lever arm 300 and the standard torque loading structure 800. That is, a standard weight 810 is applied to one end of the standard lever arm 300. Since the standard lever arm 300 can be adjusted by the arm length adjustment mechanism 700, the length of the lever arm on one side of the standard torque loading structure 800 can be adjusted. The torque of the standard torque loading structure 800 on the torque sensor 500 can be adjusted according to different lever arm lengths.

[0025] As is well known, due to the positive and negative balance characteristics of torque, the standard lever arm 300 must be leveled by applying the same torque to the balancing lever arm 200 to restore it to a horizontal position. If such a large torque is borne by the fulcrum on the bed of the base 100, it will cause the bed to deform. This deformation, combined with the torsional deformation of the torque sensor, affects the measurement accuracy. In practical applications, in this embodiment, the balancing lever arm 200 can be moved in the opposite direction of the standard lever arm 300 via the arm length adjustment mechanism 700. It is connected to the end of the balancing lever arm 200 via the balancing tension mechanism 900. The length of the balancing lever arm 200 can be adjusted as needed to apply a balancing torque at the diagonal position of the standard weight 810. This device can provide a sufficiently large balancing torque for the standard torque while ensuring that the base 100 is not deformed by the torque, so that the equipment base 100 is only subjected to normal pressure, reducing the error influence of the standard device.

[0026] Example 2:

[0027] like Figure 1 As shown, in order to mount the torque sensor 500 to be measured on the mounting bracket 400 of the base 100, this embodiment includes an adjusting block 1300 and a fixing block arranged vertically on the mounting bracket 400. The adjusting block 1300 and the fixing block have oppositely arranged receiving grooves on their opposite sides. The inner wall of the receiving groove is provided with a protective pad. The torque sensor 500 can be placed between the two receiving grooves. The adjusting block 1300 has fixing screws 1400 on both sides corresponding to the receiving grooves. The fixing screws 1400 pass through the adjusting block 1300 vertically, and their lower ends are screwed into the fixing block. In this way, the torque sensor 500 can be deployed in the receiving groove between the adjusting block 1300 and the fixing block. The torque sensor 500 is fixed by rotating the fixing screws 1400, improving the convenience of installation and disassembly. The protective pad prevents damage to the torque sensor 500.

[0028] As mentioned earlier, the end of the connecting arm 600 needs to be connected to the torque sensor 500 via a connecting mechanism. In this embodiment, the connecting mechanism is located at the coupling 1000 near the mounting bracket 400 end of the connecting arm 600. The coupling 1000 end is provided with a connecting claw 1100, which can be fixedly connected to the torque sensor 500. In this way, torque transmission can be achieved by connecting one end of the coupling 1000 to the connecting arm 600 and fixing the other end to the torque sensor 500 via the connecting claw 1100. This facilitates installation and ensures the accuracy of torque detection and measurement.

[0029] like Figure 2 and Figure 3As shown, in Embodiment 1, the arm lengths of the balancing arm 200 and the standard arm 300, respectively connected to the standard torque loading structure 800 and the balancing tension mechanism 900, can be autonomously adjusted. Specifically, the arm lengths of the standard arm 300 and the balancing arm 200 can be adjusted via the arm length adjustment mechanism 700. The arm length adjustment mechanism 700 provided in this embodiment includes an adjustment cylinder 710 and a guide rail 720. The adjustment cylinder 710 is fixed horizontally to the end of the two connecting arms 600 away from the mounting bracket 400, and is perpendicular to the connecting arms 600. The guide rail 720... The standard lever arm 300 and the balance lever arm 200 are arranged around the inner wall of the adjusting cylinder 710 along its length. The standard lever arm 300 and the balance lever arm 200 are inserted into the corresponding adjusting cylinder 710. The outer periphery of the standard lever arm 300 and the balance lever arm 200 are provided with guide grooves 730 arranged along their length. The outer periphery of the adjusting cylinder 710 is provided with an adjusting groove that penetrates the inner wall of the adjusting cylinder 710 above the standard lever arm 300 or the balance lever arm 200. An adjusting gear 740 is rotatably arranged in the adjusting groove. The adjusting gear 740 is engaged with a rack 1200 located on the outer periphery of the standard lever arm 300 and the balance lever arm 200. Thus, in practical applications, by rotating the adjusting gear 740, the balancing arm 200 and the standard arm 300 move in opposite directions, thereby enabling torque testing at a diagonal position. Controlling the arm length of the standard arm 300 of the balancing arm 200 through the adjusting gear 740 helps improve the accuracy of the test. In addition, to improve the adjustment accuracy, this embodiment has an adjusting turntable 750 connected to the adjusting gear 740 on the outside of the adjusting cylinder 710, and a rotating handle on the outside of the adjusting turntable 750. In order to make the standard arm 300 and the balancing arm 200 move stably along the longitudinal direction of the adjusting cylinder 710, this embodiment has a mounting groove 813 on the outer periphery of the standard arm 300 and the balancing arm 200, and the rack 1200 is fixed in the mounting groove 813, which is arranged along the longitudinal direction of the standard arm 300 and the balancing arm 200.

[0030] Example 3:

[0031] like Figure 3As shown, this embodiment provides a standard torque loading structure 800 for generating a standard torque. The standard torque loading structure 800 includes a standard weight 810, a weight base 820, a weight pan 830, and a lifting mechanism. The weight pan 830 and the weight base 820 are arranged vertically. The lifting mechanism is arranged at the geometric center of the upper end of the weight base. The lifting mechanism is driven by a vertically arranged lifting screw 840. The upper end of the lifting screw 840 is rotatably provided with a lifting plate 850 located below the weight pan 830. The lifting plate 850 can drive the weight pan 830 to rise or fall. The standard weight 810 has a conical positioning groove 811 on its upper surface and a conical positioning pin 812 on its lower surface. The standard weight 810 also has a mounting groove 813 arranged radially on its outer side. The width of the mounting groove 813 is slightly larger than the diameter of the lifting screw 840, so that the standard weight 810 can be arranged from top to bottom below the weight pan 830. It also includes several connecting pieces 860. The connecting pieces 860 have connecting protrusions on the outer sides of their upper and lower ends. The connecting protrusions can be matched with the connecting holes on the outer periphery of the weight pan 830 or the outer periphery of the standard weight 810.

[0032] With the above settings, when loading the standard weight 810, the weight pan 830 can be connected to the end of the standard lever arm 300. At the same time, the lifting mechanism controls the lifting plate 850 to rise so that it abuts against the weight pan 830, thereby preventing the weight pan 830 from shaking when loading the standard weight 810. The standard weight 810 can be loaded below the weight pan 830 through the connecting piece 860. The mounting groove 813 of the standard weight 810 can serve as a clearance groove to prevent the lifting screw 840 from interfering with the loading of the standard weight 810. After setting the required standard torque value and loading the corresponding number of standard weights 810, the lifting mechanism controls the lifting plate 850 to descend slightly so that it separates from the weight pan 830. The balance lever arm 200 can then apply torque to the measured torque sensor 500 under the action of the weight's gravity.

[0033] like Figure 3 As shown, the lifting mechanism for controlling the raising and lowering of the lifting plate 850 includes a threaded sleeve 870 located at the geometric center of the weight base 820 and threadedly engaged with the lifting screw 840. The threaded sleeve 870 is connected to the output end of a reducer located within the weight base 820 via a worm gear mechanism. Thus, the worm gear mechanism transmits power to the reducer, causing the threaded sleeve 870 to rotate in both directions, thereby driving the lifting screw 840 to raise or lower the lifting plate 850. In practical applications, a servo motor can be used to drive the reducer. Furthermore, the connecting piece 860 connected to the weight plate 830 is appropriately lengthened to allow for sufficient space for the lifting plate 850 to move vertically.

[0034] like Figure 3As shown, to improve the stability of the weight base 820, this embodiment provides a support frame 880 at the lower end of the weight base 820. The lower end of the support frame 880 has support blocks arranged around the outer periphery of the weight base 820, and the support blocks are screwed to the support frame 880. A horizontally arranged level bubble 890 is also provided below the weight base 820. Thus, the support blocks can stably support the weight base, and the level bubble 890 can adjust the horizontality of the support.

[0035] Example 4:

[0036] like Figure 4 As shown, this embodiment provides a balancing tension mechanism 900 for balancing standard torque, including a balancing base 910. The balancing base 910 is movable along the longitudinal direction of the balancing arm 200. The balancing base 910 is provided with a worm gear pair reduction rod assembly 920, which can be connected to the end of the balancing arm 200. The worm gear pair reduction rod assembly 920 is signal-connected to a displacement sensor disposed on the standard arm 300. After a standard torque loading structure 800 is applied to one end of the standard arm 300, the worm gear pair reduction rod assembly 920 pulls one end of the balancing arm 200 to bring the connecting arm 600 into dynamic equilibrium. In this way, the displacement sensor can detect the displacement of the standard lever arm 300, so that the balance lever arm 200 is subjected to the pulling force of the worm gear pair reduction rod assembly 920, thereby generating a balancing torque, which adjusts the standard lever arm 300 to a horizontal position; at this time, the torque generated by the combination of the standard torque loading structure 800 and the standard lever arm 300 is the standard torque, which can be used to measure the sensor under test.

[0037] To enable the balance base 910 to move to the end of the balance arm 200 to generate a balancing torque, this embodiment provides an adjusting guide rail 930720 arranged along the length of the balance arm 200 below the balance base 910. The lower end of the balance base 910 rolls into the adjusting guide rail 930720. A position sensor 940 is provided at the upper end of the balance base 910, allowing the worm gear reducer assembly 920 to move directly below the end of the balance arm 200. The balance base 910 also has extendable or foldable fixed supports 950 on both sides. The fixed supports 950, when extended, provide stable support for the balance base 910, thus placing the load support point of the balancing tension mechanism 900 of the balance arm 200 on the ground instead of the base 100. This means the base 100 is only subjected to normal pressure, reducing the error influence of the standard device.

[0038] In summary, in the technical solution of this invention, the measured torque sensor can be installed on the mounting bracket of the base. During torque testing, both ends of the measured torque sensor are connected to the connecting arm through a connecting mechanism. One end of the measured torque sensor generates torque through the connecting arm using a standard lever arm and a standard torque loading structure, i.e., a standard weight is loaded onto one end of the standard lever arm. Since the standard lever arm can be adjusted through the arm length adjustment mechanism, the length of the lever arm on one side of the standard torque loading structure can be adjusted. The torque of the standard torque loading structure on the measured torque sensor can be adjusted according to different lever arm lengths. At the same time, the balancing lever arm can move in the opposite direction of the standard lever arm through the arm length adjustment mechanism and is connected to the end of the balancing lever arm through a balancing tension mechanism. The length of the balancing lever arm can be adjusted as needed to apply a balancing torque at the diagonal position of the standard weight. This device can provide a sufficiently large balancing torque for the standard torque while ensuring that the machine tool body is not deformed by the torque.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions 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, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for balancing the reaction force of a super-torque standard device acting on the earth, characterized in that it comprises a base (100), a mounting mechanism, a balancing arm (200) and a standard arm (300); the base (100) is provided with a mounting frame (400) at the upper end, which is used to fix a measured torque sensor (500); the mounting frame (400) is provided with a connecting arm (600) at both ends; one end of the connecting arm (600) is provided with a connecting mechanism capable of being connected with the measured torque sensor (500), and the other end is provided with an arm length adjusting mechanism (700); the balancing arm (200) and the standard arm (300) are respectively horizontally mounted on one of the arm length adjusting mechanisms (700); the arm length adjusting mechanism (700) can control the reverse movement of the standard arm (300) and the balancing arm (200); the standard arm (300) is provided with a standard torque loading structure (800) at both ends; the balancing arm (200) is provided with a balancing tension mechanism (900) below; the standard torque loading structure (800) and the balancing tension structure can be connected with the corresponding end of the balancing arm (200) and the standard arm (300); when the standard torque loading structure (800) is connected with one end of the standard arm (300), the balancing tension mechanism (900) is connected with the balancing arm (200), which makes the connecting arm (600) rotate, and is used to balance the standard arm (300); the arm length adjusting mechanism (700) comprises an adjusting cylinder (710) and a guide rail (720); the adjusting cylinder (710) is fixed in the horizontal direction at the end of the two connecting arms (600) away from the mounting frame (400); the adjusting cylinder (710) is perpendicular to the connecting arm (600); the guide rail (720) is arranged on the inner wall of the adjusting cylinder (710) along the length direction of the adjusting cylinder (710); the standard arm (300) and the balancing arm (200) are inserted into the corresponding adjusting cylinder (710); the standard arm (300) and the balancing arm (200) are provided with a guide groove (730) arranged along the length direction on the outer periphery; the adjusting cylinder (710) is provided with an adjusting groove corresponding to the standard arm (300) or the balancing arm (200) on the outer periphery, which penetrates the inner wall of the adjusting cylinder (710); an adjusting gear (740) is rotatably arranged in the adjusting groove; the adjusting gear (740) is in transmission engagement with a rack (1200) arranged on the outer periphery of the standard arm (300) and the balancing arm (200); the standard torque loading structure (800) comprises a standard weight (810), a weight base (820), a weight disc (830) and a lifting mechanism; the weight disc (830) and the weight base (820) are arranged in the vertical direction; the lifting mechanism is arranged at the geometric center of the upper end of the weight base; a lifting screw (840) is vertically arranged and connected in transmission; a jacking disc (850) is rotatably arranged at the upper end of the lifting screw (840) below the weight disc (830); the jacking disc (850) can drive the weight disc (830) to rise or fall.The standard weight (810) is provided with a conical positioning groove (811) on the upper surface and a conical positioning pin (812) on the lower surface, and is further provided with a mounting groove (813) arranged along the radial direction on the outer side, the width of the mounting groove (813) being slightly larger than the diameter of the lifting screw (840), so that the standard weight (810) can be arranged below the weight disc (830) from top to bottom; a plurality of connecting pieces (860) are further included, the outer sides of the upper and lower ends of the connecting pieces (860) are provided with connecting clamping protrusions, and the connecting clamping protrusions can be clamped and matched with the connecting holes arranged on the outer periphery of the weight disc (830) or the outer periphery of the standard weight (810); the balance tension mechanism (900) includes a balance base (910), the balance base (910) can move along the length direction of the balance arm (200), the balance base (910) is internally provided with a worm wheel pair speed reduction pull rod assembly (920), the worm wheel pair speed reduction pull rod assembly (920) can be connected with the end of the balance arm (200), the worm wheel pair speed reduction pull rod assembly (920) is signal connected with a displacement sensor arranged on the standard arm (300), after one end of the standard arm (300) is loaded with the standard torque loading structure (800), the worm wheel pair speed reduction pull rod assembly (920) pulls one end of the balance arm (200) to make the connecting arm (600) in dynamic balance.

2. The device according to claim 1, wherein the mounting frame (400) comprises an upper and lower adjusting block (1300) and a fixed block, the opposite sides of the adjusting block (1300) and the fixed block are provided with oppositely arranged accommodating grooves, the inner walls of the accommodating grooves are provided with protective pads, the measured torque sensor (500) can be placed between the two accommodating grooves, the adjusting block (1300) is provided with a fixed screw (1400) on both sides of the corresponding accommodating groove, the fixed screw (1400) penetrates the adjusting block (1300) from top to bottom, and the lower end of the fixed screw (1400) is screw-connected with the fixed block.

3. The device according to claim 1, wherein the connecting mechanism is a shaft coupling (1000) arranged at one end of the connecting arm (600) close to the mounting frame (400), and the shaft coupling (1000) is provided with a connecting claw (1100) at the end thereof, and the connecting claw (1100) can be fixedly connected with the measured torque sensor (500).

4. The device according to claim 1, wherein the outer side of the adjusting cylinder (710) is provided with an adjusting turntable (750) connected with an adjusting gear (740), the outer side of the adjusting turntable (750) is provided with a rotating handle, the outer periphery of the standard force arm (300) and the balancing force arm (200) is provided with a groove, the rack (1200) is fixed in the groove, and the groove is arranged along the length direction of the standard force arm (300) and the balancing force arm (200).

5. The device according to claim 1, wherein the lifting mechanism comprises a threaded sleeve (870) arranged at the geometric center of the weight base (820) and screw-connected with a lifting screw (840), and the threaded sleeve (870) is drivingly connected with the output end of a speed reducer in the weight base (820) through a worm and gear mechanism.

6. The device according to claim 5, wherein the lower end of the weight base (820) is provided with a support frame (880), the lower end of the support frame (880) is provided with a support block arranged around the outer periphery of the weight base (820), the support block is screw-connected with the support frame (880), and a horizontal bubble (890) is further arranged below the weight base (820).

7. The device according to claim 1, wherein the balance base (910) is provided with an adjusting guide rail (930) (720) arranged along the length of the balance arm (200) below the balance base (910), the lower end of the balance base (910) is in rolling fit with the adjusting guide rail (930) (720), the upper end of the balance base (910) is provided with a position sensor (940), so that the worm pair deceleration pull rod assembly (920) can be moved to just below the end of the balance arm (200), and the balance base (910) is further provided with an expandable or foldable fixing support (950) on both sides.

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