Double-station torque measuring device

Abstract

The utility model provides a double-station torque measuring device, which comprises a base, a lever supporting seat, a lever, a first lever stress application mechanism, a second lever stress application mechanism, a first balance driving mechanism and a second balance driving mechanism, and the rated output torque of the second balance driving mechanism is larger than that of the first balance driving mechanism. According to the technical scheme, the balance driving mechanisms are arranged on the two sides of the lever respectively, and the rated output torques of the two balance driving mechanisms are different. A tested torque device can be installed between the output shaft of the first balance driving mechanism and the first rotary connecting shaft of the lever, and can also be installed between the output shaft of the second balance driving mechanism and the second rotary connecting shaft of the lever. During measurement, a proper balance driving mechanism is selected according to the torque measurement range of the measured torque device, so that tiny changes can be responded more accurately, and the measurement sensitivity and the measurement precision are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of measurement, in particular to double position torque measuring device. BACKGROUND

[0002] The lever type torque standard machine is a standard machine type capable of measuring a large torque. The common one is a dead weight type torque standard machine, which uses the gravity of a weight as a standard load, and generates a standard torque through a lever mechanism. Due to the limitation of the weight volume, a large number of standard weights need to be configured, the cost is high, and the space occupied is large. With the development of technology, at present, a force applying mechanism and a high-precision force sensor are used at the end of the lever to apply a standard load. Since no weight is needed, the use is more convenient, the space occupied is significantly reduced, and the torque standard machine of this type is gradually widely used.

[0003] The existing torque measuring device generally uses a lever balance driving mechanism to drive the lever to maintain a horizontal balance state. In order to adapt to the measurement demand of a large range torque, when the lever balance driving mechanism adopts a large rated output torque, it is difficult to quickly adjust the balance state when the torque changes, and the measurement sensitivity and accuracy are reduced. SUMMARY

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a double position torque measuring device.

[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model to solve its technical problems is: a double position torque measuring device, comprising:

[0006] a base;

[0007] a lever support seat installed in the middle of the base;

[0008] a lever installed on the lever support seat through a linear fulcrum and capable of swinging left and right, a first rotary connecting shaft fixedly installed on one side of the lever, a second rotary connecting shaft fixedly installed on the other side of the lever, and the axis of the first rotary connecting shaft and the axis of the second rotary connecting shaft being collinear with the linear fulcrum;

[0009] a first lever force applying mechanism for applying a force to one end of the lever;

[0010] a second lever force applying mechanism for applying a force to the other end of the lever;

[0011] a first balance driving mechanism located on one side of the lever, and the output shaft of the first balance driving mechanism being coaxially arranged with the first rotary connecting shaft;

[0012] A second balance driving mechanism is arranged on the other side of the lever, and an output shaft of the second balance driving mechanism is coaxially arranged with the second rotary connecting shaft;

[0013] The rated output torque of the second balance driving mechanism is greater than the rated output torque of the first balance driving mechanism.

[0014] According to the utility model, the balance driving mechanisms are arranged on the two sides of the lever, and the rated output torques of the two balance driving mechanisms are different. The measured torque device can be installed between the output shaft of the first balance driving mechanism and the first rotary connecting shaft of the lever, or can be installed between the output shaft of the second balance driving mechanism and the second rotary connecting shaft of the lever. During measurement, the appropriate balance driving mechanism is selected according to the torque measurement range of the measured torque device, so that the slight change can be more accurately responded, and the measurement sensitivity and the measurement accuracy are improved.

[0015] Further, two parallel straight line guides are arranged on the bases on the two sides of the lever, and a rack is arranged between the two straight line guides; a first rack is translatablely installed on the straight line guide on one side of the lever, the first balance driving mechanism is fixedly installed on the first rack, a first speed reducer motor is further arranged on the first rack, and a gear meshing with the rack is installed on an output shaft of the first speed reducer motor; a second rack is translatablely installed on the straight line guide on the other side of the lever, the second balance driving mechanism is fixedly installed on the second rack, a second speed reducer motor is further arranged on the second rack, and a gear meshing with the rack is installed on an output shaft of the second speed reducer motor.

[0016] According to the above preferred scheme, the axial translation of the balance driving mechanism is facilitated, so that the installation of the measured torque device is facilitated.

[0017] Further, a first support unit is translatablely installed on the straight line guide between the first rack and the lever, and a second support unit is translatablely installed on the straight line guide between the second rack and the lever, the first support unit and the second support unit both include a support base, a support platform and a platform lifting driving mechanism, a third speed reducer motor is arranged on the support base, a gear meshing with the rack is installed on an output shaft of the third speed reducer motor, the support platform is liftably installed on the support base through a vertical guide column arranged on the support platform, two left and right distributed worm gear elevators are installed on the support base, the two worm gear elevators are connected with output shafts of double output shaft speed reducer motors through couplings, the double output shaft speed reducer motor drives the worm gear elevators to further drive the support platform to lift and move, and a plurality of T-shaped grooves are arranged on the support platform.

[0018] Adopting the preferred scheme, the support unit can be translated along the linear guide rail and the support platform can be adjusted in lifting, facilitating the support during the measurement of the torque wrench and the like. The auxiliary jig can be installed on the support platform, facilitating the loading and unloading of the torque device for testing.

[0019] Further, the first lever force adding mechanism and the second lever force adding mechanism both comprise a blade module, a blade support module, a force sensor module, a first pull frame and a force applying mechanism; the blade module is fixedly installed on the upper surface of the lever end portion, the blade module comprises a blade block, the upper portion of the blade block has an outwardly protruding V-shaped blade portion; the blade support module comprises a blade support block, the lower surface of the blade support block has an inwardly recessed V-shaped blade support groove, the blade support block is pressed against the upper portion of the blade block, the V-shaped blade portion is in linear contact with the V-shaped blade support groove; the force sensor module is installed above the blade support module, the upper beam of the first pull frame is pressed against the upper portion of the force sensor module, the force applying mechanism applies downward pulling force to the lower seat of the first pull frame through the connecting piece; the force sensor module comprises n force sensors with different ranges, n-1 elastic devices and n-1 limit stoppers, wherein n≥2, the first force sensor to the n-th force sensor are sequentially distributed from top to bottom and the maximum values of the ranges sequentially increase, the n-th force sensor is installed on the upper surface of the blade support module, one elastic device is installed above each of the first force sensor to the n-1-th force sensor, a limit stopper is installed below each of the first force sensor to the n-1-th force sensor, and a stop surface is arranged on the upper beam of the first pull frame corresponding to the position of each limit stopper; when the force value applied to the force sensor module by the force applying mechanism through the first pull frame is greater than or equal to the maximum set force value of the n-1-th force sensor, the limit stopper below the n-1-th force sensor is pressed against the corresponding stop surface on the upper beam.

[0020] Adopting the preferred scheme, the lever force adding mechanism of the lever end portion adopts a plurality of force sensors with different ranges and elastic devices which are sequentially connected in series, as the applied force value increases, the contraction amount of the elastic device under stress gradually increases, when the force sensor with a smaller force value reaches the upper limit of the measurement range, the upper beam of the first pull frame is in contact with the corresponding limit stopper, and then the force sensor with a larger force value at the next stage is used to measure the applied force value, thereby expanding the torque range of the torque measuring device, and the measurement values of different range sections are measured by the high-precision force sensor of the corresponding range section, ensuring the measurement accuracy.

[0021] Further, the elastic device comprises an outer sleeve, a disc spring assembly and an inner guide column, the upper beam is provided with a hole body matched with the outer sleeve, the outer sleeve can move up and down along the corresponding hole body of the upper beam, the outer sleeve is open at the upper end, the disc spring assembly and the inner guide column are located in the inner cavity of the outer sleeve and can move up and down, the lower end of the disc spring assembly abuts against the bottom surface of the inner cavity of the outer sleeve, and the upper end of the disc spring assembly abuts against the lower end surface of the inner guide column.

[0022] Further, the disc spring assembly comprises a plurality of disc spring small units, the number of disc springs in each group of disc spring small units is same, the disc springs in the same disc spring small unit are same in direction, and the directions of adjacent disc spring small units are opposite.

[0023] By adopting the preferred scheme, the disc spring is adopted as the elastic device, the appropriate elastic deformation coefficient and the height of the elastic device are convenient to select, the axial moving position is relatively stable, and the stability of the lever force adding process is ensured.

[0024] Further, the second pull frame is further provided, the upper beam of the second pull frame is pressed against the top surface of the support column on the upper surface of the lower seat of the first pull frame through the spherical pressure head, and the lower seat of the second pull frame is connected with the force applying mechanism through the spherical joint connecting piece.

[0025] By adopting the preferred scheme, when the force value measuring device is needed, the support column can be taken out and replaced by the measured force value device, and one machine is used for multiple purposes. When the standard force sensor needs to be calibrated, the support column can be taken out and replaced by a standard force sensor with higher precision, so that the in-situ calibration of the standard force sensor in the force sensor module is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0027] Figure 1 is a structural schematic view of an embodiment of the torque measuring device of the present application.

[0028] Figure 2 is a left view of an embodiment of the torque measuring device of the present application.

[0029] Figure 3 is Figure 2 is a sectional view in A-A direction of the torque measuring device in the embodiment.

[0030] Figure 4is a structural schematic diagram of an embodiment of the force sensor module.

[0031] Figure 5 is a bottom view of an embodiment of the upper beam.

[0032] Figure 6 is Figure 5 is a sectional view along the direction of B-B in FIG.

[0033] Figure 7 is a structural schematic diagram of an embodiment of the elastic device.

[0034] Figure 8 is a structural schematic diagram of an installation mode of the force sensor module containing two different range force sensors in the upper beam.

[0035] Figure 9 is a structural schematic diagram of an installation mode of the force sensor module containing three different range force sensors in the upper beam.

[0036] Figure 10 is Figure 9 is an enlarged view of a part at C in FIG.

[0037] Figure 11 is a top view of an embodiment of the torque measuring device.

[0038] Figure 12 is Figure 11 is a sectional view along the direction of D-D in FIG.

[0039] Figure 13 is Figure 11 is a sectional view along the direction of E-E in FIG.

[0040] Figure 14 is a structural schematic diagram of the connection of the measured torque device on the torque measuring device.

[0041] Figure 15 is a structural schematic diagram of an embodiment of the rigid coupling.

[0042] Figure 16 is a structural schematic diagram of an embodiment of the ball tooth coupling.

[0043] Names of the corresponding components represented by the numbers and letters in the figures:

[0044] 10-base; 11-linear guide rail; 12-rack; 20-lever support seat; 30-lever; 31-first rotary connecting shaft; 32-second rotary connecting shaft; 41-first balance driving mechanism; 411-first rack; 42-second balance driving mechanism; 421-second rack; 422-second speed reduction motor; 50-first lever force adding mechanism; 51-blade module; 510-blade block; 511-V-shaped blade part; 52-knife support module; 520-knife support block; 521-V-shaped knife support groove; 53-force sensor module; 531-force sensor; 532-elastic device; 5321-outer sleeve; 5322-disk-shaped spring combination; 5323-inner guide column; 5324-rolling ball; 5325-spherical pressure head; 5326-top pressure bolt; 5327-pull rod nail; 533-limiting block; 5331-outer conical surface; 54-first pull frame; 541-upper beam; 542-lower seat; 543-support column; 55-force applying mechanism; 56-second pull frame; 561-upper beam; 562-lower seat; 61-lifting guide column; 62-lifting plate; 63-lifting driving mechanism; 64-guide sleeve; 641-stop portion; 65-stop ring; 651-stop surface; 652-inner conical surface; 70-second lever force adding mechanism; 81-first support unit; 811-support seat; 812-support platform; 8121-T-shaped groove; 813-platform lifting driving mechanism; 8131-guide column; 8132-worm and gear lifting machine; 8133-double output shaft speed reduction motor; 814-third speed reduction motor; 82-second support unit; 91-rigid coupling; 911-metal coupling body; 912-coupling hole; 913-first gap; 914-separation gap; 92-ball tooth coupling; 921-first connecting shaft; 9211-ball head; 9212-outer arc tooth; 922-second connecting shaft; 9221-cavity; 9222-inner arc tooth. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0046] As shown in the drawings, Figures 1-13 An embodiment of the present application is a double-station torque measuring device, which comprises:

[0047] a base 10;

[0048] a lever support seat 20 installed in the middle of the base 10;

[0049] A lever 30 is swingably mounted on the lever support base 20 via a linear fulcrum, one side of the lever 30 is fixedly mounted with a first rotary connecting shaft 31, the other side of the lever 30 is fixedly mounted with a second rotary connecting shaft 32, the axis of the first rotary connecting shaft 31 and the axis of the second rotary connecting shaft 32 are both collinear with the linear fulcrum;

[0050] A first lever force applying mechanism 50 is used to apply force to one end of the lever 30;

[0051] A second lever force applying mechanism 70 is used to apply force to the other end of the lever 30;

[0052] A first balance driving mechanism 41 is located at one side of the lever 30, the output shaft of the first balance driving mechanism 41 is coaxially arranged with the first rotary connecting shaft 31;

[0053] A second balance driving mechanism 42 is located at the other side of the lever 30, the output shaft of the second balance driving mechanism 42 is coaxially arranged with the second rotary connecting shaft 32;

[0054] The rated output torque of the second balance driving mechanism 42 is greater than the rated output torque of the first balance driving mechanism 41.

[0055] The beneficial effects of the above technical solution are: balance driving mechanisms are respectively arranged at both sides of the lever, and the rated output torques of the two balance driving mechanisms are different. The measured torque device can be installed between the output shaft of the first balance driving mechanism and the first rotary connecting shaft of the lever, or between the output shaft of the second balance driving mechanism and the second rotary connecting shaft of the lever. During measurement, according to the torque measurement range of the measured torque device, the appropriate balance driving mechanism is selected, which can more accurately respond to small changes and improve the measurement sensitivity and measurement accuracy.

[0056] As Figure 1 , Figure 11 , Figure 12As shown in the utility model, in some other embodiments of the utility model, two parallel straight rails 11 are arranged on the base 10 on both sides of the lever, and a rack 12 is arranged between the two straight rails; a first rack 411 is translatablely mounted on the straight rail on one side of the lever, a first balance driving mechanism 41 is fixedly mounted on the first rack 411, a first speed reducer motor is further arranged on the first rack 411, and a gear meshing with the rack 12 is mounted on the output shaft of the first speed reducer motor; a second rack 421 is translatablely mounted on the straight rail on the other side of the lever, a second balance driving mechanism 41 is fixedly mounted on the second rack 421, a second speed reducer motor 422 is further arranged on the second rack 421, and a gear meshing with the rack 12 is mounted on the output shaft of the second speed reducer motor 422. The beneficial effect of the above technical scheme is that the axial translation of the balance driving mechanism is facilitated, so that the installation of the measured torque device is facilitated.

[0057] As shown in the utility model, Figure 1 , Figure 11 , Figure 13 As shown in the utility model, in some other embodiments of the utility model, a first support unit 81 is further translatablely mounted on the straight rail between the first rack 411 and the lever 30, and a second support unit 82 is further translatablely mounted on the straight rail between the second rack 421 and the lever 30, the first support unit 81 and the second support unit 82 both comprise a support base 811, a support platform 812 and a platform lifting driving mechanism 813, a third speed reducer motor 814 is arranged on the support base 811, a gear meshing with the rack 12 is mounted on the output shaft of the third speed reducer motor 814, the support platform 812 is liftably mounted on the support base 811 through the vertically arranged guide column 8131, two left and right distributed worm gear elevators 8132 are further mounted on the support base 811, the two worm gear elevators 8132 are connected with the output shafts of the double output shaft speed reducer motors 8133 through couplings respectively, the double output shaft speed reducer motors 8133 drive the worm gear elevators 8132 to further drive the lifting movement of the support platform 812, and a plurality of T-shaped grooves 8121 are arranged on the support platform 812. The beneficial effect of the above technical scheme is that the support unit can be translated along the straight rail, and the support platform can be lifted and adjusted, so that the support during the measurement of torque wrenches and the like devices is facilitated. Auxiliary jigs can be mounted on the support platform, so that the loading and unloading of torque devices for testing are facilitated.

[0058] As shown in the utility model, Figures 2-8As shown, in some other embodiments of the present application, the first lever force adding mechanism 50 and the second lever force adding mechanism 70 both comprise a blade module 51, a blade support module 52, a force sensor module 53, a first pull frame 54 and a force adding mechanism 55; the blade module 51 is fixedly installed on the upper surface of the end portion of the lever 30, the blade module 51 comprises a blade block 510, the upper portion of the blade block 510 has an outward protruding V-shaped blade portion 511; the blade support module 52 comprises a blade support block 520, the lower surface of the blade support block 520 has an inward recessed V-shaped blade support groove 521, the blade support block 520 is pressed against the upper portion of the blade block 510, the V-shaped blade portion 511 is in linear contact with the V-shaped blade support groove 521; the force sensor module 53 is installed above the blade support module 52, the upper beam 541 of the first pull frame 54 is pressed against the upper portion of the force sensor module 53, the force adding mechanism 55 exerts downward pulling force on the lower seat 542 of the first pull frame 54 through a connecting piece; the force sensor module 53 comprises n force sensors 531 with different ranges, n-1 elastic devices 532 and n-1 limit stoppers 533, wherein n≥2, the first force sensor 531 to the n-th force sensor 531 are sequentially distributed from top to bottom and the maximum values of the ranges sequentially increase, the n-th force sensor 531 is installed on the upper surface of the blade support module 52, one elastic device 532 is installed above the first force sensor 531 to the n-1-th force sensor 531, one limit stopper 533 is installed below the first force sensor 531 to the n-1-th force sensor 531, and a stop surface 651 is arranged on the upper beam 541 of the first pull frame 54 at a position corresponding to each limit stopper 533, when the force value exerted by the force adding mechanism 55 on the force sensor module 53 through the first pull frame 54 is greater than or equal to the maximum set force value of the n-1-th force sensor 531, the limit stopper 533 below the n-1-th force sensor 531 is pressed against the corresponding stop surface 651 on the upper beam.

[0059] The beneficial effects of the above technical solution are that: the lever force adding mechanism at the end portion of the lever sequentially connects a plurality of force sensors with different ranges and elastic devices, as the exerted force value increases, the contraction amount of the elastic device under stress gradually increases, when the force sensor with a smaller force value reaches the upper limit of the measurement range, the upper beam of the first pull frame contacts the corresponding limit stopper, and then the force sensor with a larger force value at the next stage is used to measure the exerted force value, thereby expanding the torque range of the torque measurement device, and the measurement values of different range sections are measured by high-precision force sensors of corresponding range sections, thereby ensuring the measurement accuracy. The force sensor module is arranged in an overhead manner above the blade support module, thereby ensuring that the linear contact position of the lever end portion force remains constant, ensuring the stability of the lever force arm value, and improving the accuracy of the torque standard value.

[0060] As Figure 2 , Figure 3As shown in some other embodiments of the utility model, still include second pull frame 56, the upper beam 561 of second pull frame 56 is pressed on the top surface of the support column 543 on the upper surface of the lower seat 542 of first pull frame 54 by spherical pressure head, the lower seat 562 of second pull frame 56 is connected with force applying mechanism 55 by ball joint connector. The beneficial effects of the above technical solution are: when the force value device needs to be measured, the support column can be removed and replaced by the measured force value device, one machine with multiple uses. When the standard force sensor needs to be calibrated, the support column can be removed and replaced by a higher precision standard force sensor, which facilitates the in-situ calibration of the standard force sensor in the force sensor module.

[0061] As shown in some other embodiments of the utility model, Figure 7 , Figure 8 As shown in some other embodiments of the utility model, elastic device 532 includes outer sleeve 5321, disc spring combination 5322 and inner guide column 5323, the upper beam is provided with a hole body matched with outer sleeve 5321, outer sleeve 5321 can move axially up and down along the corresponding hole body of the upper beam, the upper end of outer sleeve 5321 is open, disc spring combination 5322 and inner guide column 5323 are located in the inner cavity of outer sleeve 5321 and can move up and down, the lower end of disc spring combination 5322 abuts against the bottom surface of the inner cavity of outer sleeve 5321, and the upper end of disc spring combination 5322 abuts against the lower end surface of inner guide column 5323. Disc spring combination 5322 includes multiple disc spring small units, the number of disc springs contained in each group of disc spring small units is same, the disc springs in the same disc spring small unit are oriented in the same direction, and the orientations of adjacent disc spring small units are opposite. The beneficial effects of the above technical solution are: disc springs are used as elastic devices, which facilitates the selection of appropriate elastic deformation coefficient and the height of elastic devices, and the axial movement position is relatively stable, ensuring the stability of the lever force application process.

[0062] As shown in some other embodiments of the utility model, Figure 7 , Figure 8 As shown in some other embodiments of the utility model, the lower surface of inner guide column 5323 is provided with a core column extending to the inner hole of disc spring combination 5322 on one side of disc spring combination 5322, the upper surface of inner guide column 5323 is provided with a concave hole groove, a ball 5324 is arranged in the hole groove, each elastic device 532 is in point contact with the device above it through ball 5324, and the bottom surface of outer sleeve 5321 is provided with spherical pressure head 5325. Outer sleeve 5321 is in contact with the top surface of force sensor 531 below it through the spherical surface of spherical pressure head 5325. In the middle of the top surface of upper beam 541 of first pull frame 54, a jacking bolt 5326 is connected by screw thread, and the lower end surface of jacking bolt 5326 abuts against ball 5324 of the uppermost layer elastic device 532. The beneficial effects of the above technical solution are: it ensures that the outer sleeve of the elastic device can move smoothly in the hole body of the corresponding upper beam, and prevents the outer sleeve from being stuck when the force is axially offset.

[0063] As Figures 4-6 shown, in some other embodiments of the utility model, a plurality of through holes in circumferential array distribution are arranged on the top surface of the upper beam of the first pull frame 54, a threaded hole corresponding to the through hole is arranged on the upper end surface of the outer sleeve 5321 of the uppermost layer of elastic devices 532, and a pull rod nail 5327 is further arranged, the pull rod nail 5327 is connected with the threaded hole of the outer sleeve 5321 through the through hole, and when the outer sleeve 5321 is moved downward to a set distance, the head of the pull rod nail 5327 abuts against the upper end surface of the through hole of the upper beam. The beneficial effects of the above technical scheme are: facilitate the installation of elastic devices, prevent the elastic devices from falling off during maintenance and debugging.

[0064] As Figure 9 , Figure 10 shown, in some other embodiments of the utility model, the upper beam 541 of the first pull frame 54 is internally provided with a lifting guide column 61, 2*(n-1) lifting plates 62 are movably installed on the lifting guide column 61, each lifting plate 62 is provided with a lifting driving mechanism for driving it to move up and down, and the middle position of each lifting plate 62 is provided with an opening; from top to bottom, the guide sleeve 64 is detachably fixedly installed at the middle opening of the 1st, 3rd…2n-1th lifting plate 62, the n-1th elastic device 532 is installed in the guide sleeve 64 on the 2n-1th lifting plate and can move up and down along the guide sleeve 64; from top to bottom, the stop ring 65 is detachably fixedly installed at the middle opening of the 2nd, 4th…2n-2th lifting plate 62, and a stop surface 651 is arranged on the lower surface of the stop ring 65, when the force value applied by the force applying mechanism 55 to the force sensor module 53 through the first pull frame 54 is greater than or equal to the maximum set force value of the n-1th force sensor 531, the limiting stop block 533 below the n-1th force sensor 531 abuts against the stop surface 651 of the stop ring 65 on the 2n-2th lifting plate. The beneficial effects of the above technical scheme are: the guide sleeve and the stop ring are carried and installed by the lifting plate with adjustable height position, the measurement maximum value during the range switching of each force sensor can be conveniently adjusted, each force sensor high-precision measurement range is maximized, and the accuracy of torque measurement is further improved. At the same time, in order to adapt to elastic devices and force sensors of different sizes, only the matched guide sleeve and stop ring need to be replaced, without the need of customizing and processing the upper beam with special size structure, the commonality of the first pull frame is improved, and the manufacturing cost is reduced.

[0065] As Figure 10As shown in the utility model, in some other embodiments of the utility model, the lower end of the central hole of the guide sleeve 64 is provided with a radially inwardly extending stopper 641, the inner edge diameter of the stopper 641 is smaller than the outer diameter of the corresponding elastic device outer sleeve 5321, and the inner edge diameter of the stopper 641 is greater than the outer diameter of the upper part of the force sensor 531 below it. The beneficial effects of the above technical scheme are: neither interfering with the upward movement of the outer sleeve when the elastic device is under pressure, nor holding the outer sleeve after the pressure is removed, facilitating installation and debugging.

[0066] As shown in the utility model, in some other embodiments of the utility model, the lower end of the central hole of the guide sleeve 64 is provided with a radially inwardly extending stopper 641, the inner edge diameter of the stopper 641 is smaller than the outer diameter of the corresponding elastic device outer sleeve 5321, and the inner edge diameter of the stopper 641 is greater than the outer diameter of the upper part of the force sensor 531 below it. The beneficial effects of the above technical scheme are: neither interfering with the upward movement of the outer sleeve when the elastic device is under pressure, nor holding the outer sleeve after the pressure is removed, facilitating installation and debugging. Figure 10 As shown in the utility model, in some other embodiments of the utility model, the lower end of the central hole of the guide sleeve 64 is provided with a radially inwardly extending stopper 641, the inner edge diameter of the stopper 641 is smaller than the outer diameter of the corresponding elastic device outer sleeve 5321, and the inner edge diameter of the stopper 641 is greater than the outer diameter of the upper part of the force sensor 531 below it. The beneficial effects of the above technical scheme are: neither interfering with the upward movement of the outer sleeve when the elastic device is under pressure, nor holding the outer sleeve after the pressure is removed, facilitating installation and debugging.

[0067] Due to the existence of errors in the process of machining and assembly, the axis of the lever rotary connecting shaft and the axis of the output shaft of the balance driving mechanism cannot be completely coaxial, the elastic coupling is usually used to connect between the measured torque device and the balance driving mechanism and the lever to compensate the axis deviation, ensure the continuity and stability of torque transmission, but the elastic coupling connection mode is affected by the gravity of the measured torque device and sinks, resulting in a large deviation between the axis of the measured torque device and the axis of the lever rotary connecting shaft and the axis of the output shaft of the balance driving mechanism, and further affecting the torque detection accuracy. Figures 14-16As shown, in some other embodiments of the present application, the two ends of the torque measuring device connected with the balance driving mechanism and the lever are connected by a rigid coupling 91 at one end and a ball tooth coupling 92 at the other end, the rigid coupling 91 comprises a metal coupling body 911 of integral structure, the metal coupling body 911 is provided with a through coupling hole 912 in the center, the metal coupling body 911 is further provided with a first gap 913 extending radially outward from the coupling hole, the metal coupling body 911 is provided with a circumferentially arranged separation gap 914 in the middle, the arc length of the separation gap 914 is half a circumference, and the two ends of the separation gap 914 are respectively provided with locking bolts for locking after the rigid coupling is connected with the object shaft. The ball tooth coupling 92 comprises a first connecting shaft 921 and a second connecting shaft 922, one end of the first connecting shaft 921 is provided with a ball head 9211, the ball head 9211 is provided with an outer arc tooth 9212, the other end of the first connecting shaft 921 is provided with a coupling hole, one end of the second connecting shaft 922 is provided with a hemispherical cavity 9221, the cavity wall of the cavity 9221 is provided with an inner arc tooth 9222 engaged with the outer arc tooth 9212, and the other end of the second connecting shaft 922 is provided with a coupling hole. The beneficial effects of the above technical scheme are: the connection mode of the rigid coupling at one end and the ball tooth coupling at the other end can ensure the coaxiality of the torque measuring device and the butt joint end, the ball tooth coupling at the other end can compensate the coaxiality deviation of the torque measuring device and the butt joint end, compensate the axis deviation of the lever rotary connecting shaft and the output shaft of the balance driving mechanism, and the torque measuring device will not be affected by gravity and sink by combining the rigid coupling and the ball tooth coupling, and the accuracy of torque detection is improved.

[0068] The above examples are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application, and any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A dual station torque measuring device characterized by, The utility model relates to a balance drive mechanism for a lever, comprising: a base; a lever support seat installed in the middle of the base; a lever installed on the lever support seat through a linear fulcrum and capable of swinging left and right, one side of the lever being fixedly installed with a first rotary connecting shaft, the other side of the lever being fixedly installed with a second rotary connecting shaft, the axis of the first rotary connecting shaft and the axis of the second rotary connecting shaft being collinear with the linear fulcrum; a first lever force applying mechanism for applying force to one end of the lever; a second lever force applying mechanism for applying force to the other end of the lever; a first balance drive mechanism located on one side of the lever, the output shaft of the first balance drive mechanism being coaxially arranged with the first rotary connecting shaft; a second balance drive mechanism located on the other side of the lever, the output shaft of the second balance drive mechanism being coaxially arranged with the second rotary connecting shaft; the rated output torque of the second balance drive mechanism being greater than the rated output torque of the first balance drive mechanism.

2. The dual station torque measurement device of claim 1, wherein, Two parallel straight linear guides are respectively arranged on the base on both sides of the lever, and a rack is arranged between the two straight linear guides; a first rack is translatably installed on the straight linear guide on one side of the lever, the first balance drive mechanism being fixedly installed on the first rack, a first speed reducer motor being further arranged on the first rack, and a gear engaged with the rack being installed on the output shaft of the first speed reducer motor.

3. The dual station torque measurement device of claim 2, wherein, A second rack is translatably installed on the straight linear guide on the other side of the lever, the second balance drive mechanism being fixedly installed on the second rack, a second speed reducer motor being further arranged on the second rack, and a gear engaged with the rack being installed on the output shaft of the second speed reducer motor.

4. The dual station torque measurement device of claim 3, wherein, A first support unit is translatably installed on the straight linear guide between the first rack and the lever, and a second support unit is translatably installed on the straight linear guide between the second rack and the lever.

5. The dual station torque measurement device of claim 4, wherein, Both the first support unit and the second support unit comprise a support seat, a support platform and a platform lifting drive mechanism, a third speed reducer motor being arranged on the support seat, a gear engaged with the rack being installed on the output shaft of the third speed reducer motor, the support platform being liftably installed on the support seat through a vertically arranged guide column, two left and right distributed worm gear elevators being further installed on the support seat, the two worm gear elevators being connected with the output shafts of double output shaft speed reducer motors through couplings, the double output shaft speed reducer motor driving the worm gear elevators and further driving the support platform to move up and down.

6. The dual station torque measurement device of claim 5, wherein, A plurality of T-shaped grooves are arranged on the support platform.

7. The dual station torque measurement device of claim 1, wherein, The first lever force adding mechanism and the second lever force adding mechanism both comprise a blade module, a blade support module, a force sensor module, a first pull frame and a force adding mechanism; the blade module is fixedly installed on the upper surface of the end of the lever, the blade module comprises a blade block, the upper part of the blade block has an outward convex V-shaped blade part; the blade support module comprises a blade support block, the lower surface of the blade support block has an inward recessed V-shaped blade support groove, the blade support block is pressed against the upper part of the blade block, the V-shaped blade part is in linear contact with the V-shaped blade support groove; the force sensor module is installed above the blade support module, the upper beam of the first pull frame is pressed against the upper part of the force sensor module, the force adding mechanism applies downward pulling force to the lower seat of the first pull frame through the connecting piece; the force sensor module comprises n force sensors with different ranges, n-1 elastic devices and n-1 limit blocks, wherein n≥2, the first force sensor to the n-th force sensor are sequentially distributed from top to bottom and the maximum values of the ranges sequentially increase, the n-th force sensor is installed on the upper surface of the blade support module, one elastic device is installed above each of the first to n-1-th force sensors, a limit block is installed below each of the first to n-1-th force sensors, a stop surface is arranged on the upper beam of the first pull frame corresponding to the position of each limit block, and when the force value applied by the force adding mechanism to the force sensor module through the first pull frame is greater than or equal to the maximum set force value of the n-1-th force sensor, the limit block below the n-1-th force sensor is pressed against the corresponding stop surface on the upper beam.

8. The dual station torque measurement device of claim 7, wherein, The elastic device comprises an outer sleeve, a disc spring combination and an inner guide column, the upper beam is provided with a hole body matched with the outer sleeve, the outer sleeve can move axially up and down along the corresponding hole body of the upper beam, the upper end of the outer sleeve is open, the disc spring combination and the inner guide column are both located in the inner cavity of the outer sleeve and can move up and down, the lower end of the disc spring combination abuts against the bottom surface of the inner cavity of the outer sleeve, and the upper end of the disc spring combination abuts against the lower end surface of the inner guide column.

9. The dual station torque measurement device of claim 8, wherein, The disc spring combination comprises a plurality of disc spring small units, the disc springs in each group of disc spring small units are the same in number, the disc springs in the same disc spring small unit are the same in direction, and the directions of the disc spring small units adjacent to each other are opposite.

10. The dual station torque measurement device of claim 7, wherein, The second pull frame is further provided, the upper beam of the second pull frame is pressed against the top surface of the support column on the upper surface of the lower seat of the first pull frame through a spherical pressure head, and the lower seat of the second pull frame is connected with the force adding mechanism through a spherical joint connecting piece.

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