Torque tester
By employing an elastic buffer sleeve structure in the adapter within the torque tester, the problems of sensor damage and data distortion in high-torque testing are solved, thereby protecting the sensor and improving the accuracy of the measurement results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN AILIBAO INSTRUMENT CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-04-10
AI Technical Summary
Existing torque testers suffer from sensor overload damage and distorted dynamic torque measurement data during high torque testing due to their rigid structure. Existing buffer devices cannot effectively cope with torque fluctuations in the torsional direction.
The test adapter includes an adapter base, an adapter screw, and an elastic buffer sleeve. The elastic buffer sleeve absorbs the impact force under axial force and converts it into elastic potential energy, thereby reducing stress concentration and protecting the sensor.
It effectively avoids stress concentration, improves sensor lifespan and test result accuracy, and enhances sensor reliability and dynamic torque measurement stability.
Smart Images
Figure CN224108976U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to torque testing technical field, concretely relates to a torque tester. BACKGROUND
[0002] Torque tester is the precision instrument for detecting, calibrating all kinds of tool and equipment moment, is widely used in the moment setting check of electric screwdriver, wind batch, torque wrench etc.
[0003] At present, the adapter commonly seen on the market is rigid integrated structure, for example, adopts metal sleeve or hard alloy shaft coupling, directly connects tool end and tester sensor end through mechanical processing. Such structure can stably transfer torque in low torque testing scene (such as 0-50N·m), but there are significant defects in high torque testing (such as 200N·m above) : rigid structure lacks buffering mechanism when bearing instantaneous high torque impact, can cause stress concentration and generate peak torque, and such peak value is easy to exceed sensor range, causes sensor overload and even permanent damage. In addition, high-frequency vibration interference directly acts on the sensor through rigid transmission, causes dynamic torque measurement data distortion.
[0004] For this, the prior art alleviates impact through elastic gasket or spring coupling, but elastic gasket can only absorb axial impact, cannot cope with torque fluctuation in torsion direction, spring coupling structure is complex and bulky, is difficult to adapt to portable torque tester. UTILITY MODEL CONTENTS
[0005] Therefore, the utility model provides a torque tester to solve the problem of sensor damage in tester host caused by rigid impact.
[0006] To achieve the above object, the utility model adopts the following technical scheme:
[0007] A torque tester, including tester host, the surface of the shell of tester host is equipped with test interface, still including test adapter, the test adapter includes adapter seat, adapter screw rod and elastic buffer sleeve, the bottom end of adapter seat is fixed and inserted in test interface, the top end middle part of adapter seat is fixed with the hollow stud extending upwards, the threaded rod body of adapter screw rod is connected with the internal thread of hollow stud and forms screw joint, the cap top of adapter screw rod is equipped with the adapter interface for the tool to be tested, the elastic buffer sleeve is coaxially sleeved on the outer periphery of hollow stud and rod part of adapter screw rod, and the bottom end of elastic buffer sleeve abuts on the top surface of adapter seat, and the top end abuts on the bottom end of cap of adapter screw rod, to provide axial elastic buffer in the process of torque transmission.
[0008] Optionally, the elastic buffer sleeve comprises a buffer spring, a spring pressing cap, a ball disc and a gasket, the buffer spring is coaxially sleeved on the outer periphery of the hollow stud and the rod part of the adapter screw rod, the bottom end thereof abuts against the top surface of the adapter seat, and the top end thereof abuts against the inner top surface of the spring pressing cap, the spring pressing cap is liftable and sleeved on the outer periphery of the threaded rod body of the adapter screw rod, the ball disc and the gasket are clamped between the outer top surface of the spring pressing cap and the cap part of the adapter screw rod, the circumferential direction of the ball disc is uniformly provided with a plurality of balls, each ball is embedded in the ball groove of the ball disc, and the upper and lower surfaces of the ball are respectively in rolling contact with the bottom end surface of the gasket and the top end surface of the spring pressing cap.
[0009] Optionally, the spring pressing cap comprises a cylindrical body and a ring table fixedly connected to the inner wall of the axial middle part of the cylindrical body, and an annular cavity is formed between the ring table and the inner wall of the cylindrical body; the ball disc and the gasket are coaxially stacked in the annular cavity.
[0010] Optionally, an annular guide groove is coaxially formed in the top surface of the ring table, for accommodating the lower half of the ball and guiding the rolling thereof; the bottom end surface of the gasket is provided with a spherical pit corresponding to each ball, the curvature radius of the spherical pit matches the radius of the ball, and the upper half of the ball is rollably embedded in the spherical pit.
[0011] Optionally, a plurality of clamping seats are fixedly arranged on the shell of the tester host around the test interface, and a locking screw is arranged in each clamping seat; the end part of the locking screw abuts against the outer peripheral wall of the adapter seat radially inward, and the adapter seat is clamped and fixed by the synchronous tightening of the locking screws.
[0012] Optionally, the internal thread of the hollow stud extends axially downward and penetrates the adapter seat, forming a through-thread hole penetrating the adapter seat.
[0013] Optionally, the profile of the adapter interface is a cross-shaped groove or a plum blossom-shaped groove.
[0014] Optionally, the hole diameters of the center holes of the spring pressing cap and the ball disc are greater than the outer diameter of the threaded rod body of the adapter screw rod, and a gap fit is formed between the center holes and the threaded rod body.
[0015] The beneficial effects of the utility model are as follows:
[0016] The utility model discloses a torque testing appearance, through the test adapter, the tool of being tested is connected to the testing appearance host, when the tool of being tested bears the torque in the testing process, the elastic buffer sleeve is compressed under the action of axial force at this moment, and the elastic potential is converted to the impact force by using its elastic property, thereby reducing the instantaneous transmission of axial stress, which can effectively avoid stress concentration phenomenon, prevent the peak torque from stress concentration, and further cause the damage of the sensor in the testing appearance host, improve the service life of sensor and the accuracy of test result. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a perspective view of a torque testing appearance of the utility model embodiment;
[0018] Figure 2 It is Figure 1 the explosion map;
[0019] Figure 3 It is Figure 1 the sectional view;
[0020] Figure 4 It is Figure 1 the internal schematic diagram of testing appearance host in
[0021] Reference signs:
[0022] Testing appearance host 10, testing interface 11, clamping seat 12, locking screw 13, test adapter 20, adapter seat 21, hollow stud 211, adapter screw 22, adapter interface 221, buffer spring 23, spring pressure cap 24, cylindrical main body 241, ring table 242, annular guide groove 243, ball disc 25, ball 251, gasket 26, spherical recess 261. DETAILED DESCRIPTION
[0023] The technical scheme of the utility model will be described in detail below in combination with the drawings and specific embodiments. Same parts are indicated by same reference signs.
[0024] Please refer to Figures 1 to 4 The utility model discloses a torque testing appearance, including testing appearance host 10 and test adapter 20.
[0025] As Figure 1 And Figure 2 Shown, the casing surface of testing appearance host 10 is equipped with testing interface 11, and this testing interface 11 is standard part, is used for realizing the plug-in connection of testing adapter 20 or the direct connection of the tool of being tested, and based on the standardization design, testing interface 11 can adapt to the adapter component of industry general and the tool of being tested, ensures the compatibility and universality of testing appearance.
[0026] In the embodiment of the utility model, need explain: test appearance host computer 10 is for detecting various torque detection instrument, can be used for detecting and calibrating various electric screwdriver, pneumatic screwdriver, torque screwdriver and torque wrench and other tool torque, still can be used for detecting motor, motor, bottle cap, toy, lamp holder's torque, make it meet the production needs, and various product and part's rotation destruction test etc.
[0027] As Figure 1 And Figure 4 Indicated in the embodiment of the utility model, test appearance host computer 10 selects digital display liquid crystal display, can set maximum, minimum and overload alarm protection prompt, test mode has real-time tracking, peak value keeps, automatic peak value keeps mode, has three kinds of switching unit, is respectively: Kgf.cm / Lbf.in / N.m, still has numerical value preservation and printing and communication connection PLC automation function.
[0028] As Figure 2 And Figure 3 Indicated, test adapter 20 includes adapter seat 21, adapter screw rod 22 and elastic buffer sleeve, the bottom end of adapter seat 21 is fixedly inserted in test interface 11, the top end middle part of adapter seat 21 is fixed with the hollow stud 211 extending upwards, the inside of this hollow stud 211 is provided with internal thread, the threaded rod body of adapter screw rod 22 is screw-connected with the internal thread of hollow stud 211, the cap top of adapter screw rod 22 is provided with adapter interface 221, this adapter interface 221 is used to connect with the tool to be tested to transmit torque, elastic buffer sleeve is coaxially sleeved on the outer periphery of hollow stud 211 and the rod portion of adapter screw rod 22, and the bottom end of elastic buffer sleeve abuts against the top surface of adapter seat 21, and the top end abuts against the bottom end of the cap of adapter screw rod 22, for providing axial elastic buffer during torque transmission.
[0029] The torque tester of the embodiment of the utility model connects the tool to be tested to test appearance host computer 10 through test adapter 20, when the tool to be tested bears torque during the test process, at this time, elastic buffer sleeve is compressed under the action of axial force, impact force is converted into elastic potential energy by using its elastic property, so as to reduce the instantaneous transmission of axial stress, which can effectively avoid stress concentration phenomenon, prevent peak torque from generating due to stress concentration, and further cause damage to the sensor inside test appearance host computer 10, improve the service life of the sensor and the accuracy of test results.
[0030] In the embodiment of the utility model, the elastic buffer sleeve includes buffer spring 23, spring pressure cap 24, ball disc 25 and gasket 26, buffer spring 23 is helical spring, buffer spring 23 coaxially covers and is located in the outer periphery of the stem part of hollow stud 211 and adapter screw rod 22, its bottom end abuts on the top surface of adapter seat 21, the top end abuts on the inner top surface of spring pressure cap 24, spring pressure cap 24 can be lifted and cover and be located in the outer periphery of the stem body of adapter screw rod 22, ball disc 25 and gasket 26 are clamped between the outer top surface of spring pressure cap 24 and the cap part of adapter screw rod 22, the circumferential of ball disc 25 is evenly distributed with a plurality of ball 251, each ball 251 is embedded in the ball groove of ball disc 25 respectively, and the upper and lower surfaces of ball 251 are rolling fit with the bottom end surface of gasket 26 and the top end surface of spring pressure cap 24 respectively.
[0031] Specifically, when testing torque, adapter screw rod 22 is driven by the tested tool to rotate along the internal thread of hollow stud 211, and simultaneously drives gasket 26 and ball disc 25 to rotate around the central axis. Since the balls 251 on the ball disc 25 form rolling contact with the top end surface of the spring pressure cap 24 and the bottom end surface of the gasket 26, the balls 251 can rotate freely under the action of the rolling pair, thereby decoupling the rotational motion of the adapter screw rod 22 and the axial motion of the spring pressure cap 24, i.e. the rotation of the adapter screw rod 22 only drives the synchronous rotation of the gasket 26 and the ball disc 25, while the spring pressure cap 24 cannot follow the rotation due to the circumferential limitation and can only move axially along the threaded rod body of the adapter screw rod 22 to compress or release the buffer spring 23. By designing the above structure, the buffer spring 23 absorbs the axial impact load generated during torque transmission in the axial compression process, converts the impact energy into the elastic potential energy of the spring, and realizes the buffering and attenuation of the dynamic load. The rolling pair structure of the balls 251 of the ball disc 25 effectively reduces the friction resistance between the rotating part and the axially moving part, improves the smoothness of the rotation of the adapter screw rod 22, effectively suppresses the peak torque generated by stress concentration during torque transmission through the elastic deformation buffering of the buffer spring 23, thereby protecting the torque sensor inside the tester host 10, and significantly improving the reliability of the sensor and the accuracy of the test data.
[0032] In the embodiment of the utility model, spring pressure cap 24 includes cylindrical body 241 and ring table 242 fixedly connected to the inner wall of the axial middle part of cylindrical body 241, annular recess is formed between ring table 242 and the inner wall of cylindrical body 241, ball disc 25 and gasket 26 are coaxially stacked in the annular recess, and the stepped structure of cylindrical body 241 and ring table 242 provides a clear axial installation positioning space for ball disc 25 and gasket 26, so that the two components can be coaxially positioned through the inner wall of the annular recess and the end surface of ring table 242 during assembly, avoiding the problem of poor rolling pair contact caused by eccentric installation.
[0033] In the embodiment of the utility model, the top surface of ring table 242 is coaxially provided with annular guide groove 243, which is used for accommodating the lower half of ball 251 and guiding the rolling thereof; the bottom end surface of gasket 26 is provided with spherical recess 261 corresponding to each ball 251, the curvature radius of spherical recess 261 matches the radius of ball 251, and the upper half of ball 251 is rollably embedded in spherical recess 261. By arranging spherical recess 261, synchronous rotation of gasket 26 and ball disc 25 can be realized, and by arranging annular guide groove 243, the rolling of ball 251 in annular guide groove 243 allows ball disc 25 to freely rotate relative to spring pressure cap 24, thereby completing the decoupling of the rotary motion and the axial motion.
[0034] In the embodiment of the utility model, a plurality of clamping seats 12 are fixedly arranged on the shell of the tester host 10 around the test interface 11, and a locking screw 13 is arranged in each clamping seat 12; the end of the locking screw 13 abuts against the outer peripheral wall of the adapter seat 21 radially inward, and the adapter seat 21 is clamped and fixed at multiple points in the circumferential direction by synchronous tightening of the locking screws 13. The double constraint mechanism of circumferential multi-point clamping and fixed insertion significantly improves the connection reliability of the test adapter 20 and the tester host 10.
[0035] In the embodiment of the utility model, the internal thread of the hollow stud 211 extends downward and penetrates the adapter seat 21, forming a through-thread hole that penetrates the adapter seat 21, so that when the threaded rod body of the adapter screw 22 cooperates with the internal thread of the hollow stud 211, the effective thread engagement length is significantly increased.
[0036] In the embodiment of the utility model, the profile of the adapter interface 221 is a cross-shaped groove or a wobbly-shaped groove. In other alternative embodiments, the adapter interface 221 can also be configured as a square groove, a hexagonal groove, or other special interface structure according to the connection requirements of the tool being tested. This design uses modular interface profile configuration to enable the adapter interface 221 to form shape cooperation with the driving end of common tools such as screwdrivers and wrenches on the market, achieving quick connection.
[0037] In the embodiment of the utility model, the hole diameter of the center hole of the spring pressure cap 24 and the ball disc 25 is greater than the outer diameter of the threaded rod body of the adapter screw 22, and a clearance fit is formed between the center hole and the threaded rod body. The bottom of the cap end of the adapter screw 22 is clamped in the center hole of the gasket 26, and when the adapter screw 22 is driven to rotate, the cap end drives the gasket 26 to rotate synchronously through the clamping fit; and the spring pressure cap 24 and the ball disc 25 are not circumferentially constrained by the clearance fit between the center through hole and the threaded rod body, but only maintain a coaxial state, thereby ensuring the stability of torque transmission.
[0038] The technical scheme of the utility model is described in detail in combination with specific examples above, and the specific examples are described for helping to understand the idea of the utility model. The deduction and deformation made by the person skilled in the art on the basis of the specific examples of the utility model also belong to the protection scope of the utility model.
Claims
1. A torque tester, comprising a tester main machine (10), a test interface (11) is arranged on the surface of the shell of the tester main machine (10), characterized in that: a test adapter (20) is further arranged, the test adapter (20) comprises an adapter seat (21), an adapter screw rod (22) and an elastic buffer sleeve, the bottom end of the adapter seat (21) is fixedly inserted into the test interface (11), the middle top end of the adapter seat (21) is fixedly provided with a hollow stud (211) extending upward, the threaded rod body of the adapter screw rod (22) is screw-connected with the inner thread of the hollow stud (211), the cap top end of the adapter screw rod (22) is provided with an adapter interface (221) for a tool to be tested, the elastic buffer sleeve is coaxially sleeved on the outer periphery of the hollow stud (211) and the rod part of the adapter screw rod (22), and the bottom end of the elastic buffer sleeve abuts against the top surface of the adapter seat (21) and the top end abuts against the bottom end of the cap part of the adapter screw rod (22), so as to provide axial elastic buffering during torque transmission. The elastic buffer sleeve comprises a buffer spring (23), a spring pressing cap (24), a ball disc (25) and a gasket (26), the buffer spring (23) is coaxially sleeved on the outer periphery of the hollow stud (211) and the rod part of the adapter screw rod (22), the bottom end of the buffer spring (23) abuts against the top surface of the adapter seat (21), and the top end of the buffer spring (23) abuts against the inner top surface of the spring pressing cap (24), the spring pressing cap (24) is liftable and sleeved on the outer periphery of the threaded rod body of the adapter screw rod (22), the ball disc (25) and the gasket (26) are clamped between the outer top surface of the spring pressing cap (24) and the cap part of the adapter screw rod (22), a plurality of balls (251) are uniformly distributed in the circumferential direction of the ball disc (25), each ball (251) is embedded in the ball groove of the ball disc (25), and the upper and lower surfaces of the ball (251) are in rolling contact with the bottom end surface of the gasket (26) and the top end surface of the spring pressing cap (24) respectively.
2. The torque tester of claim 1, wherein, The spring pressing cap (24) comprises a cylindrical body (241) and a ring table (242) fixedly connected to the axial middle inner wall of the cylindrical body (241), and an annular recess is formed between the ring table (242) and the inner wall of the cylindrical body (241); the ball disc (25) and the gasket (26) are coaxially stacked in the annular recess.
3. A torque tester according to claim 2, wherein, An annular guide groove (243) is coaxially arranged on the top surface of the ring table (242) and used for accommodating the lower half of the ball (251) and guiding the rolling thereof; the bottom end surface of the gasket (26) is provided with a spherical recess (261) corresponding to each ball (251), the curvature radius of the spherical recess (261) matches the radius of the ball (251), and the upper half of the ball (251) is rollably embedded in the spherical recess (261).
4. The torque tester of claim 3, wherein, 5. A torque tester according to claim 4, wherein, A plurality of clamping seats (12) are fixed around the test interface (11) on the shell of the tester host (10), and a locking screw (13) is arranged in each clamping seat (12); the end of the locking screw (13) abuts against the outer peripheral wall of the adapter seat (21) radially inward, and the adapter seat (21) is clamped and fixed at multiple points in the circumferential direction by synchronous tightening of each locking screw (13).
6. A torque tester according to claim 5, wherein, The internal thread of the hollow stud (211) extends axially downward and penetrates the adapter seat (21), forming a through-thread hole penetrating the adapter seat (21).
7. The torque tester of claim 1, wherein, The profile of the adapter interface (221) is a cross-shaped groove or a waffle-shaped groove.
8. The torque tester of claim 2, wherein, The hole diameter of the central hole of the spring pressure cap (24) and the ball disc (25) is greater than the outer diameter of the threaded rod body of the adapter screw (22), and a clearance fit is formed between the central hole and the threaded rod body.