CN117451236B - Friction torque testing method - Google Patents
Friction torque testing method Download PDFInfo
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- CN117451236B CN117451236B CN202311490990.7A CN202311490990A CN117451236B CN 117451236 B CN117451236 B CN 117451236B CN 202311490990 A CN202311490990 A CN 202311490990A CN 117451236 B CN117451236 B CN 117451236B
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- 238000012360 testing method Methods 0.000 title claims abstract description 251
- 230000007246 mechanism Effects 0.000 claims description 126
- 238000000034 method Methods 0.000 claims description 6
- 238000010606 normalization Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 description 12
- 238000010586 diagram Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000013459 approach Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention relates to a friction torque testing method, belongs to the technical field of universal joint testing, and solves the problem that the friction torque of a universal joint cannot be effectively tested in the prior art. The invention adopts the testing device to test the friction moment of the universal joint, and clamps the universal joint on the testing device; adjusting the test angle of the universal joint; carrying out friction torque test on the universal joint and outputting test results; unloading the universal joint from the testing device and restoring the testing device to an initial state. The invention realizes effective friction torque test of the universal joint, is convenient to operate, and improves the production and manufacturing efficiency of the universal joint.
Description
Technical Field
The invention relates to the technical field of universal joint testing, in particular to a friction torque testing method.
Background
Along with the development of technology, the requirements on accurate transmission are higher and higher; the universal joint is an efficient transmission structure, and for the universal joint with accurate transmission requirement (the friction moment is smaller than 4.5gf cm), a testing method for the friction moment is lacking at present, so that the precision of the universal joint cannot be effectively known, and the manufacturing of the universal joint with high precision is restricted.
Disclosure of Invention
In view of the above analysis, the present invention is directed to a method for testing friction torque, which is used to solve the problem that the friction torque of a universal joint cannot be tested effectively in the prior art.
The aim of the invention is mainly realized by the following technical scheme:
A friction torque testing method adopts a testing device to test friction torque of a single rotating shaft of a universal joint, and comprises the following steps:
Clamping a universal joint to the testing device;
Adjusting the test angle of the universal joint;
carrying out friction torque test on the universal joint and outputting test results;
unloading the universal joint from the testing device and restoring the testing device to an initial state.
Further, the clamping the universal joint to the testing device includes: and clamping the centering mechanism to an inner rotating member in the universal joint.
Further, the clamping the universal joint to the testing device further includes: the outer frame of the universal joint is fixed on the clamping mechanism.
Further, the clamping of the centering mechanism to the inner rotating member in the universal joint includes: the connecting line of the first contact post and the second contact post of the centering mechanism is perpendicular to the rotation axis of the inner rotating member.
Further, the fixing the outer frame of the universal joint on the clamping mechanism includes: the outer frame of the universal joint is positioned through the positioning pin, so that the plane of the outer frame is parallel to the plane of the clamping frame.
Further, the fixing the outer frame of the universal joint on the clamping mechanism further comprises: the knob fastening knob fixedly connects the outer frame of the universal joint with the clamping frame.
Further, the adjusting the test angle of the universal joint includes: the rotation angle adjusting mechanism adjusts the angle between the plane of the clamping frame and the plane of the base body.
Further, the adjusting the test angle of the universal joint further includes: and the test angle value of the current universal joint is displayed through the matching of the positioning knob and the angle scale marks.
Further, the testing of the friction torque of the universal joint under the test angle and outputting the test result comprise: the testing device is electrified and initialized, the reset mechanism is started to perform resetting and positioning on the internal rotating piece of the universal joint, the first testing mechanism and the second testing mechanism are started to perform friction torque testing on the universal joint, and a testing result is output.
Further, the testing of the friction torque of the universal joint under the testing angle, outputting the testing result, further includes: the first testing mechanism, the second testing mechanism and the reset mechanism are started to operate alternately for a plurality of times to test the friction torque of the universal joint for a plurality of times under the same testing angle.
The technical scheme of the invention can at least realize one of the following effects:
(1) The invention discloses a friction torque testing method, which adopts a testing device to test friction torque of a universal joint, and comprises the following steps: clamping a universal joint to the testing device; adjusting the test angle of the universal joint; carrying out friction torque test on the universal joint and outputting test results; unloading the universal joint from the testing device and restoring the testing device to an initial state. The invention realizes effective friction torque test of the universal joint, is convenient to operate, and improves the production and manufacturing efficiency of the universal joint.
(2) According to the invention, the angle between the plane of the clamping frame and the plane of the base body is adjusted by adjusting the testing angle of the universal joint, so that the angle between the plane of the internal rotating piece of the universal joint and the plane of the outer frame is adjusted, the testing angle of the universal joint is further adjusted, the friction moment test of the universal joint under different testing angles is realized, the comprehensiveness of the friction moment test of the universal joint is improved, and the friction moment condition of the universal joint can be more comprehensively known.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a schematic view of a universal joint according to an embodiment 1 of the present invention;
FIG. 2 is a flow chart of the friction torque test of the universal joint according to the embodiment 1 of the present invention;
FIG. 3 is a schematic structural diagram of a testing device in embodiment 2 of the present invention;
FIG. 4 is a schematic view of the structure of the base in the embodiment 2 of the present invention;
fig. 5 is a schematic structural diagram of a clamping unit in embodiment 2 of the present invention;
fig. 6 is a schematic structural diagram of a clamping mechanism in embodiment 2 of the present invention;
FIG. 7 is a schematic structural view of a centering mechanism in embodiment 2 of the present invention;
FIG. 8 is a schematic diagram of the structure of a measuring unit in embodiment 2 of the present invention;
FIG. 9 is a schematic structural diagram of a first testing mechanism in embodiment 2 of the present invention;
FIG. 10 is a schematic structural diagram of a second testing mechanism in embodiment 2 of the present invention;
Fig. 11 is a schematic structural view of a reset mechanism in embodiment 2 of the present invention.
Reference numerals:
1-a base; 11-a base body; 12-balancing support legs; 13-a level indicator; 2-a clamping unit; 21-a frame; 22-clamping mechanism; 221-clamping a frame; 222-locating pins; 223-tightening a knob; 23-a centering mechanism; 231-centering fixture; 2311-first contact pillars; 2312-second contact pillars; 2313-a reset aperture; 232-balancing weight; 24-an angle adjustment mechanism; 241-rotating disk; 242-mounting table; 243-positioning a knob; 3-a measuring unit; 31-a first test mechanism; 311-a first chute; 312-a first drive motor; 313-first decelerator; 314—a first lead screw; 315-a first sliding table; 316-a first support bar; 317-a first force application end post; 318-first guide plate; 319-a first moment detection sensor; 32-a second test mechanism; 321-a second chute; 322-a second drive motor; 323-a second reduction gear; 324-a second lead screw; 325-a second slipway; 326-a second support bar; 327-a second force application end post; 328-second guide plate; 329-a second torque detection sensor; 33-a reset mechanism; 331-a third chute; 332-a third drive motor; 333-third decelerator; 334-a third lead screw; 335-a third slipway; 336-reset lever; 337-a third guide plate; 34-mounting rack; 35-a mounting base; 4-a control box; 100-universal joint; 101-an outer frame; 102-internal rotation member.
Detailed Description
The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.
Example 1
In one embodiment of the present invention, a method for testing friction torque of a universal joint 100 is disclosed, as shown in fig. 1, the universal joint 100 includes an outer frame 101 and an inner rotating member 102, wherein the inner rotating member 102 is disposed in the outer frame 101 and is rotatably connected with the outer frame 101; as shown in fig. 2, the testing method adopts a torque testing device to test the friction torque of the universal joint, and comprises the following steps:
Step 1: clamping the universal joint 100 to the test device;
specifically, the centering mechanism 23 is clamped on the inner rotary member 102 in the universal joint 100, then the outer frame 101 of the universal joint 100 is fixed on the clamping mechanism 22, and the universal joint 100 is pulled and clamped on the moment testing device through the clamping mechanism 22;
further, the centering mechanism 23 is clamped to the inner rotating member 102 in the universal joint 100, and the connection line of the first contact post 2311 and the second contact post 2312 in the centering mechanism 23 is made perpendicular to the rotation axis of the inner rotating member 102;
Further, the universal joint 100 to be tested is fixedly clamped in a clamping frame 221 in the centering mechanism 23, the outer frame 101 of the universal joint 100 is positioned through a positioning pin 222, the plane of the outer frame 101 is kept parallel to the plane of the clamping frame 221, and the outer frame of the universal joint 100 is fixedly connected with the clamping frame 221 by a knob fastening knob 223;
step 2: adjusting a test angle of the universal joint 100;
Specifically, the rotation angle adjusting mechanism 24 adjusts the angle between the plane of the clamping frame 221 and the plane of the base body 11, so as to adjust the angle between the plane of the inner rotating member 102 of the universal joint 100 and the plane of the outer frame 101, further adjust the testing angle of the universal joint 100, realize the testing of the friction moment of the universal joint 100 under different testing angles, improve the comprehensiveness of the testing of the friction moment of the universal joint 100, and more comprehensively understand the situation of the friction moment of the universal joint 100;
Further, by matching the positioning knob 243 with the angle scale marks, the angle between the plane of the current clamping frame 221 and the plane of the base body 11 is displayed, that is, the test angle value between the plane of the internal rotating member 102 of the current universal joint 100 and the plane of the outer frame 101 is displayed, so that the accuracy of testing the friction torque of the universal joint 100 under different angles is improved;
further, the adjustable range of the test angle is +/-40 degrees;
Step 3: performing friction torque test on the universal joint 100 and outputting a test result;
specifically, the test device is powered on and initialized, the reset mechanism 33 is started to perform the resetting and positioning of the internal rotating member 102 of the universal joint 100, the first test mechanism 31 and the second test mechanism 32 are started to perform the friction torque test on the universal joint 100, and the test structure is output; the method specifically comprises the following steps:
step 301: the internal rotation mechanism 102 in the universal joint 100 is subjected to righting and positioning, so that the universal joint 100 maintains a test angle;
specifically, the third driving motor 332 in the reset mechanism 33 is started to drive the third screw 334 to rotate through the third reducer 333, so as to drive the third chute 331 to drive the reset lever 336 to move along the third chute 331 in the direction of approaching the centering mechanism 23, the reset lever 336 is inserted into the reset hole 2313, and the internal rotating member 102 in the universal joint 100 is positioned in a centering manner, so that the plane of the internal rotating member 102 is perpendicular to the plane of the base body 11, and even if the included angle between the plane of the internal rotating member 102 and the plane of the outer frame 101 maintains a test angle; after the internal rotating member 102 is positioned in the normal direction, the third driving motor 332 is reversed, and the reset lever 336 is controlled to return to the initial position;
Step 302: starting the first testing mechanism 31 to test the friction moment when the universal joint 100 rotates forward, and outputting a test result;
Specifically, the first driving motor 312 in the first testing mechanism 31 is started to drive the first lead screw 314 to rotate through the first reducer 313, so as to drive the first sliding table 315 to drive the first force application end post 317 to move along the first sliding groove 311 towards the direction of approach of the centering mechanism 23, and the first force application end post 317 pushes the first contact post 2311 in the centering mechanism 23 to drive the internal rotating member 102 in the universal joint 100 to rotate forward under the testing angle; the first force moment detection sensor 319 detects the friction moment when the first force application end post 317 pushes the inner rotary member 102 in the universal joint 100 to rotate forward under the test angle, the detected result is transmitted to the controller, and the controller calculates and removes the influence of noise (such as the gravity of the universal joint 100, the centering mechanism 23 and the like) and then outputs the friction moment when the universal joint 100 rotates forward under the test angle; after the test is completed, the first driving motor 312 is reversed, and the first force application end post 317 is controlled to be restored to the initial position;
Step 303: the internal rotation mechanism 102 in the universal joint 100 is subjected to righting and positioning, so that the universal joint 100 maintains a test angle;
specifically, step 303 is the same as step 301;
Step 304: starting the second testing mechanism 32 to test the friction moment when the universal joint 100 rotates in the negative direction, and outputting a test result;
Specifically, a second driving motor 322 in the second testing mechanism 32 is started to drive a second lead screw 324 to rotate through a second speed reducer 323, so that a second sliding table 325 is driven to drive a second force application end post 327 to move along a second sliding groove 321 towards the direction of approaching the centering mechanism 23, and the second force application end post 327 pushes a second contact post 2312 in the centering mechanism 23 to drive an internal rotating member 102 in the universal joint 100 to rotate negatively under a testing angle; the second moment detection sensor 329 is used for detecting the friction moment when the second force application end post 327 pushes the inner rotating member 102 in the universal joint 100 to rotate in the negative direction under the test angle, the detected result is transmitted to the controller, and the controller is used for calculating and removing the influence of noise (such as the gravity of the universal joint 100, the centering mechanism 23 and the like) and then outputting the friction moment when the universal joint 100 rotates in the negative direction under the test angle; after the test is completed, the second driving motor 322 is reversed, and the second force application end post 327 is controlled to restore to the initial position;
In order to improve the accuracy of the friction torque test of the universal joint 100 under the same test angle, the steps 301 to 304 may be repeatedly executed to perform the friction torque test multiple times, and the test result may be output;
step 4: unloading the universal joint (100) from the testing device and restoring the testing device to an initial state;
compared with the prior art, the testing method can effectively test the friction moment of the universal joint 100 under different testing angles and output the testing result, so that the friction moment condition of the universal joint 100 can be effectively known, and the production and manufacturing efficiency of the universal joint 100 is improved.
Example 2
In another specific embodiment of the present invention, as shown in fig. 3, a testing device for embodiment 1 is disclosed, including a base 1, a clamping unit 2, a measuring unit 3 and a control box 4, where the clamping unit 2, the measuring unit 3 and the control box 4 are fixedly installed on the base 1, the clamping unit 2 is opposite to the measuring unit 3 in a horizontal direction, the clamping unit 2 is used for clamping a universal joint 100 to be tested, and can also adjust a testing angle of the universal joint 100, the measuring unit 3 is used for performing a friction torque test on the universal joint 100 clamped by the clamping unit 2, and a controller is provided in the control box 4, and the controller is connected with the measuring unit 3 and is used for controlling the measuring unit 3 to perform a friction torque test on the universal joint 100; the testing device realizes the friction torque test of the universal joint 100 under different testing angles by arranging the clamping unit 2 and the measuring unit 3, has simple structure and convenient operation, improves the testing efficiency and the testing precision, and further improves the production and manufacturing efficiency of the universal joint 100.
Preferably, as shown in fig. 4, the base 1 includes a base body 11 and a plurality of balance legs 12, where a plurality of balance legs 12 are fixedly installed on the lower surface of the base body 11, and the plane where the base body 11 is located is always kept parallel to the ground plane by adjusting the balance legs 12, so that the testing precision of the testing device on the friction moment of the universal joint 100 is improved, and meanwhile, the plurality of balance legs 12 are in contact with the ground, so that the stability of the support of the base body 11 can be improved, the running stability of the testing device is further improved, and the testing precision is improved.
Preferably, the base 1 further includes a horizontal indicator 13, where the horizontal indicator 13 is fixedly installed on the upper surface of the base body 11, and is used for displaying the parallelism degree of the plane where the base body 11 is located and the ground, so that the efficiency of adjusting the parallelism of the plane where the base body 11 is located and the ground can be improved, and meanwhile, the accuracy of adjusting the parallelism of the plane where the base body 11 is located and the ground can also be improved, so that the testing efficiency and the testing accuracy of the testing device on the friction torque of the universal joint 100 can be improved; the two horizontal indicators 13 are arranged and are positioned at the opposite angles of the base body 11, so that the accuracy of adjusting the parallelism between the plane of the base body 11 and the ground can be further improved, and the testing efficiency and the testing accuracy of the testing device on the friction moment of the universal joint 100 can be further improved.
Preferably, as shown in fig. 5, the clamping unit 2 includes a frame 21 and a clamp, the clamp includes a clamping mechanism 22 and a centering mechanism 23, the frame 21 is fixedly mounted on the base body 11, the clamping mechanism 22 is mounted on the frame 21 and is rotatably connected with the frame 21, the clamping mechanism 22 is used for clamping the outer frame 101 of the universal joint 100, and the universal joint 100 is connected with the testing device; the centering mechanism 23 is detachably mounted on the inner rotating member 102 of the universal joint 100, and is used for keeping the plane of the inner rotating member 102 of the universal joint 100 perpendicular to the plane of the base body 11 under the action of gravity.
Preferably, as shown in fig. 6, the clamping mechanism 22 includes a clamping frame 221, a positioning pin 222 and a fastening knob 223, where the clamping frame 221 includes a cross beam and a vertical beam (a cross beam parallel to a plane where the base body 11 is located, and other vertical beams), and the vertical beams are respectively connected with the stand 21 in a rotating manner through pin shafts; the positioning pin 222 is mounted on one of the beams of the clamping frame 221, and can cooperate with a positioning hole on the outer frame 101 of the universal joint 100 to position the universal joint 100, so that the rotation axis of the inner rotating member 102 in the universal joint 100 and the rotation axis of the clamping frame 221 are collinear, and the plane of the outer frame 101 of the universal joint 100 is parallel to the plane of the clamping frame 221; in this embodiment, it is preferable that the plane of the outer frame 101 of the universal joint 100 is coplanar with the plane of the clamping frame 221; the fastening knob 223 is rotatably connected with the other cross beam of the clamping frame 221, and the outer frame 101 of the universal joint 100 can be tightly pressed by the fastening knob 223, so that the universal joint 100 is fixedly installed on the clamping frame 221, and the outer frame 101 of the universal joint 100 can synchronously rotate along with the clamping frame 221.
Preferably, as shown in fig. 7, the centering mechanism 23 includes a centering fixture 231, a first contact post 2311, a second contact post 2312 and a reset hole 2313 are provided on an end surface of one end of the centering fixture 231, the first contact post 2311 and the second contact post 2312 are located on the same vertical plane, and the first contact post 2311 and the second contact post 2312 are distributed at both sides of a rotation axis of the clamping frame 221, and the first contact post 2311 and the second contact post 2312 are used for receiving an pushing force applied by the measuring unit 3, so as to push the inner rotating member 102 of the universal joint 100 to rotate relative to the outer frame 101; the distance from the axis of the first contact post 2311 to the rotation axis of the clamping frame 221 is equal to the distance from the axis of the second contact post 2312 to the rotation axis of the clamping frame 221, so that the consistency of stress of the testing device in the process of testing the friction moment of the universal joint 100 can be improved, and the precision of testing the friction moment of the universal joint 100 by the testing device is further improved; the reset hole 2313 corresponds to the reset lever 336 of the reset mechanism 33 in the measurement unit 3, and is matched with the reset mechanism 33, so that the inner rotating member 102 in the universal joint 100 can be quickly reset, the plane of the inner rotating member 102 always keeps perpendicular to the plane of the base body 11, even if the inner rotating member 102 is quickly restored to the initial position under the test angle, the consistency of force application of the test device in testing the friction moment of the universal joint 100 under different test angles is improved, and the test efficiency and the test precision of the test device in testing the friction moment of the universal joint 100 are further improved.
Preferably, the centering mechanism 23 further includes a balancing weight 232, where the balancing weight 232 is detachably mounted on an end surface of the other end of the centering fixture 231, and is used for balancing the internal rotating member 102 of the universal joint 100, and under the action of gravity of the balancing weight 232, the plane of the internal rotating member 102 of the universal joint 100 can be automatically kept perpendicular to the plane of the base body 11.
Preferably, the clamping unit 2 further includes an angle adjusting mechanism 24, where the angle adjusting mechanism 24 is rotatably installed on the frame 21 and is fixedly connected with a rotation shaft of the clamping frame 221 in the clamping mechanism 22, and the angle between the plane of the clamping frame 221 and the plane of the base body 11 can be adjusted by rotating the angle adjusting mechanism 24, so that the plane of the inner rotating member 102 of the universal joint 100 and the plane of the outer frame 101 are at different testing angles, and further, the friction torque test of the universal joint 100 under different testing angles is implemented, and further, the comprehensiveness of the friction torque test of the universal joint 100 by the testing device is improved.
Preferably, the angle adjusting mechanism 24 includes a rotating disc 241, a mounting table 242, and a positioning knob 243, wherein the rotating disc 241 is rotatably connected with the frame 21 and fixedly connected with the clamping frame 221 through a rotating shaft; the mounting table 242 is mounted on the frame 21 and is arranged corresponding to the rotating disc 241; the positioning knob 243 is rotatably connected with the mounting table 242 and is arranged along the radial direction of the rotating disc 241, the rotating disc 241 can adjust the included angle between the plane of the clamping frame 221 and the plane of the base body 11, the knob positioning knob 243 pushes against the rotating disc 241 to fix the rotating disc relative to the frame 21, so that the plane of the clamping frame 221 and the plane of the base body 11 can keep different included angles, and further, under the gravity action of the centering mechanism 23, the plane of the inner rotating member 102 of the universal joint 100 and the plane of the outer frame 101 can keep different testing angles, so that the friction torque test of the universal joint 100 under different testing angles is realized, and the comprehensiveness of the testing device on the friction torque test of the universal joint 100 is improved.
Preferably, an angle scale line is provided at the edge of the rotating disc 241, and the positioning knob 243 is further matched with the angle scale line, so that an angle between the plane of the current clamping frame 221 and the plane of the base body 11, that is, a test angle value between the plane of the internal rotating member 102 of the current universal joint 100 and the plane of the outer frame 101, can be displayed, thereby improving the accuracy of testing the friction torque of the universal joint 100 under different angles.
Preferably, as shown in fig. 8, the measuring unit 3 includes a first testing mechanism 31, a second testing mechanism 32, a reset mechanism 33, a mounting frame 34 and a mounting seat 35, wherein the mounting frame 34 and the mounting seat 35 are fixedly mounted on the upper surface of the base body 11, and the mounting seat 35 is located in the mounting frame 34, the first testing mechanism 31 is fixedly mounted on the inner side of the top wall of the mounting frame 34 and is disposed opposite to the first contact post 2311 in the centering mechanism 23 clamped on the universal joint 100 in the horizontal direction, and the first testing mechanism 31 is used for testing the friction torque of the universal joint 100 when the universal joint 100 rotates in the forward direction (the internal rotating member 102 in the universal joint 100 rotates clockwise as the forward direction); the second testing mechanism 32 is fixedly installed on the installation seat 35, is positioned in the same vertical plane with the first testing mechanism 31, and is correspondingly arranged in parallel with the first testing mechanism 31 in the plane; the second testing mechanism 32 is disposed opposite to the second contact post 2312 in the centering mechanism 23 clamped on the universal joint 100 in the horizontal direction, that is, the distance between the first testing mechanism 31 and the second testing mechanism 32 is equal to the distance between the first contact post 2311 and the second contact post 2312, and the second testing mechanism 32 is used for testing the friction torque of the universal joint 100 when the universal joint 100 rotates negatively (the internal rotating member 102 in the universal joint 100 rotates anticlockwise as negative); the reset mechanism 33 is fixedly installed on the inner side of one of the side walls of the mounting frame 34, and is disposed opposite to the reset hole 2313 in the centering mechanism 23 clamped on the universal joint 100 in the horizontal direction, and is used for quickly resetting the inner rotating member 102 in the universal joint 100, so that the plane of the inner rotating member 102 in the universal joint 100 is kept perpendicular to the plane of the base body 11, even if the inner rotating member 102 of the universal joint 100 is quickly restored to the initial position under the testing angle, the consistency of the force application of the testing device in testing the friction moment of the universal joint 100 under different testing angles is improved, and the testing efficiency and the testing precision of the testing device in testing the friction moment of the universal joint 100 are further improved.
Preferably, as shown in fig. 9, the first testing mechanism 31 includes a first chute 311, a first driving motor 312, a first reducer 313, a first screw rod 314, a first sliding table 315, a first supporting rod 316, and a first force application end post 317, where the first chute 311 is fixedly installed inside the top wall of the mounting frame 34, is parallel to the plane of the base body 11, and extends in the direction of the centering mechanism 23; the first driving motor 312, the first reducer 313 and the first screw 314 are sequentially connected, and the first screw 314 is erected in the first chute 311 and is rotationally connected with the first chute 311; the first sliding table 315 is slidably installed in the first sliding groove 311, and sleeved on the first lead screw 314, and is in threaded connection with the first lead screw 314; one end of the first supporting rod 316 is fixedly connected with the first sliding table 315, the other end of the first supporting rod is fixedly connected with the first force application end post 317, the axis of the first force application end post 317 is collinear with the axis of the first contact post 2311 in the centering mechanism 23 clamped on the universal joint 100, the first driving motor 312 drives the first lead screw 314 to rotate through the first speed reducer 313, so that the first sliding table 315 is driven to drive the first force application end post 317 to move along the direction that the first sliding groove 311 approaches or moves away from the centering mechanism 23, and when the first driving motor 312 drives the first force application end post 317 to approach the centering mechanism 23, the first contact post 2311 in the centering mechanism 23 is driven to drive the internal rotating member 102 of the universal joint 100 to rotate positively under a testing angle, so that the friction moment of the forward rotation of the universal joint 100 is tested.
Preferably, the first testing mechanism 31 further includes a first guide plate 318, where the first guide plate 318 is fastened to the first sliding groove 311, so that foreign matters can be prevented from entering the first sliding groove 311, the testing accuracy of the friction torque of the universal joint 100 is prevented from being affected, and meanwhile, the sliding direction of the first sliding table 315 can be guided, so that the first force application end post 317 can move along the first guide plate 318 in the direction approaching or separating from the centering mechanism 23.
Preferably, the first testing mechanism 31 further includes a first moment detecting sensor 319, where the first moment detecting sensor 319 is mounted on the first force applying end post 317, and the first moment detecting sensor 319 is configured to detect a moment when the first force applying end post 317 pushes the inner rotating member 102 of the universal joint 100 to rotate forward under a testing angle, and transmit the detected moment to the controller, and output a friction moment of the universal joint 100 under the testing angle after calculation by the controller.
Preferably, as shown in fig. 10, the second testing mechanism 32 includes a second sliding groove 321, a second driving motor 322, a second speed reducer 323, a second lead screw 324, a second sliding table 325, a second supporting rod 326, and a second force application end post 327, where the second sliding groove 321 is fixedly installed on the installation seat 35, is parallel to the first sliding groove 311 in the first testing mechanism 31, and extends toward the direction of the centering mechanism 23; the second driving motor 322, the second speed reducer 323 and the second lead screw 324 are sequentially connected, and the second lead screw 324 is erected in the second chute 321 and is rotationally connected with the second chute 321; the second sliding table 325 is slidably installed in the second sliding groove 321, and is sleeved on the second screw rod 324, and is in threaded connection with the second screw rod 324; one end of the second supporting rod 326 is fixedly connected with the second sliding table 325, the other end of the second supporting rod is fixedly connected with the second force application end post 327, the axis of the second force application end post 327 is collinear with the axis of the second contact post 2312 in the centering mechanism 23 clamped on the universal joint 100, the second driving motor 322 drives the second lead screw 324 to rotate through the second speed reducer 323, so that the second sliding table 325 is driven to drive the second force application end post 327 to move along the second sliding groove 321 towards the direction of approaching or separating from the centering mechanism 23, and when the second driving motor 322 drives the second force application end post 327 to approach the centering mechanism 23, the second force application end post 327 pushes the second contact post 2312 in the centering mechanism 23 to drive the internal rotating member 102 of the universal joint 100 to rotate negatively under the testing angle, so as to test the friction torque of the negative rotation of the universal joint 100.
Preferably, the second testing mechanism 32 further includes a second guide plate 328, where the second guide plate 328 is fastened to the second sliding groove 321, so that foreign matters can be prevented from entering the second sliding groove 321, the testing accuracy of the friction torque of the universal joint 100 is prevented from being affected, and meanwhile, the sliding direction of the second sliding table 325 can be guided, so that the second force application end post 327 can move along the second guide plate 328 in the direction of approaching or separating from the clamping unit 2.
Preferably, the second testing mechanism 32 further includes a second torque detecting sensor 329, where the second torque detecting sensor 329 is installed on the second force applying end post 327, and the second torque detecting sensor 329 is configured to detect a torque when the second force applying end post 327 pushes the inner rotating member 102 of the universal joint 100 to rotate forward under a testing angle, and transmit the detected result to the controller, and output the friction torque of the universal joint 100 under the testing angle after calculation by the controller.
Preferably, as shown in fig. 11, the reset mechanism 33 includes a third sliding groove 331, a third driving motor 332, a third reducer 333, a third screw 334, a third sliding table 335, and a reset rod 336, where the third sliding groove 331 is fixedly installed on the inner side of one of the side walls of the mounting frame 34, is parallel to the first sliding groove 311 in the first testing mechanism 31, and extends in the direction of the centering mechanism 23; the third driving motor 332, the third reducer 333, and the third screw 334 are sequentially connected, and the third screw 334 is erected in the third chute 331 and is rotationally connected with the third chute 331; the third sliding table 335 is slidably installed in the third sliding groove 331, and is sleeved on the third screw rod 334, and is in threaded connection with the third screw rod 334; one end of the reset rod 336 is fixedly connected with the third sliding table 335, and the other end of the reset rod 336 is coaxially arranged with the reset hole 2313 in the centering mechanism 23 clamped on the universal joint 100 and can be inserted into the reset hole 2313; the third driving motor 332 drives the third screw rod 334 to rotate through the third reducer 333, so as to drive the third chute 331 to drive the reset lever 336 to move along the third chute 331 towards the direction of approaching or separating from the centering mechanism 23, when the third driving motor 332 drives the reset lever 336 to approach towards the centering mechanism 23, the reset lever 336 is inserted into the reset hole 2313 in the centering mechanism 23, so as to quickly reset the inner rotating member 102 in the universal joint 100, so that the plane of the inner rotating member 102 in the universal joint 100 is always kept perpendicular to the plane of the base body 11, even if the plane of the inner rotating member 102 in the universal joint 100 is kept at a test angle with the plane of the outer frame 101, so that the consistency of the force application of the first testing mechanism 31 and the second testing mechanism 32 is improved when the friction moment of the universal joint 100 is tested under different test angles, and meanwhile, the interference error of the internal friction moment of the testing device and the gravity factor on the friction moment test result of the universal joint 100 can be eliminated, so that the test precision of the testing device for testing the friction moment of the universal joint 100 is improved.
The reset mechanism 33 further includes a third guide plate 337, where the third guide plate 337 is fastened to the third chute 331, so as to prevent foreign matters from entering the third chute 331, avoid affecting the testing accuracy of the friction torque of the universal joint 100, and guide the sliding direction of the third sliding table 335, so that the reset rod 336 can move along the third guide plate 337 in the direction approaching or departing from the reset centering mechanism 23.
Preferably, the first driving motor 312, the second driving motor 322 and the third driving motor 332 are stepping motors; the first driving motor 312, the second driving motor 322 and the third driving motor 332 are all connected with a controller, and the start and stop of the first driving motor 312, the second driving motor 322 and the third driving motor 332 can be controlled by the controller.
Preferably, the opposite end surfaces of the first force applying end post 317 and the first contact post 2311 and the opposite end surface of the second force applying end post 327 and the second contact post 2312 are respectively provided with a magnetic block, and the opposite magnetic poles of the two opposite magnetic blocks are the same, so that the first force applying end post 317 can be prevented from directly contacting the first contact post 2311 and the second force applying end post 327 can be prevented from directly contacting the second contact post 2312 when the testing device performs friction torque testing on the universal joint 100, and the wear of the first force applying end post 317, the first contact post 2311, the second force applying end post 327 and the second contact post 2312 can be prevented, thereby prolonging the service life of the testing device.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (5)
1. The friction torque testing method is characterized in that a testing device is adopted to test friction torque of a single rotating shaft of a universal joint (100), and the method comprises the following steps:
clamping a universal joint (100) to the test device;
Adjusting a test angle of the universal joint (100);
carrying out friction torque test on the universal joint (100) and outputting a test result;
unloading the universal joint (100) from the testing device and restoring the testing device to an initial state;
the clamping of the universal joint (100) to the test device comprises: clamping the centering mechanism (23) on an inner rotating member (102) in the universal joint (100), and fixing an outer frame (101) of the universal joint (100) on the clamping mechanism (22);
The test angle of the adjusting universal joint (100) comprises: the rotation angle adjusting mechanism (24) adjusts the angle between the plane of the clamping frame (221) and the plane of the base body (11);
The friction torque test performed on the universal joint (100) under the test angle and outputting the test result comprises: the testing device is electrified and initialized, a reset mechanism (33) is started to perform normalization positioning on an internal rotating piece (102) of the universal joint (100), a first testing mechanism (31) and a second testing mechanism (32) are started to perform friction torque testing on the universal joint (100), a testing result is output, and the first testing mechanism (31), the second testing mechanism (32) and the reset mechanism (33) are alternately started to operate for a plurality of times to perform friction torque testing on the universal joint (100) under the same testing angle;
The first test mechanism (31) and the second test mechanism (32) are started to test the friction torque of the universal joint (100), and output test results, and the method comprises the following steps: and starting the first testing mechanism (31) to test the friction moment when the universal joint (100) rotates positively, outputting a test result, starting the second testing mechanism (32) to test the friction moment when the universal joint (100) rotates negatively, and outputting a test result.
2. A friction torque testing method according to claim 1, characterized in that said clamping of the centering mechanism (23) to the inner rotating member (102) in the universal joint (100) comprises: the connection line of the first contact post 2311 and the second contact post 2312 of the centering mechanism 23 is made perpendicular to the rotation axis of the inner rotary member 102.
3. A friction torque testing method according to claim 1, characterized in that said fixing the outer frame (101) of the universal joint (100) to the clamping mechanism (22) comprises: the outer frame (101) of the universal joint (100) is positioned by the positioning pin (222) so that the plane of the outer frame (101) is parallel to the plane of the clamping frame (221).
4. A friction torque testing method according to claim 3, characterized in that said fixing the outer frame (101) of the universal joint (100) to the clamping mechanism (22) further comprises: the knob tightening knob (223) fixedly connects the outer frame of the universal joint (100) with the clamping frame (221).
5. A friction torque testing method according to claim 1, characterized in that said adjusting the testing angle of the universal joint (100) further comprises: and the test angle value of the current universal joint (100) is displayed through the matching of the positioning knob (243) and the angle scale marks.
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| CN202311490990.7A CN117451236B (en) | 2023-11-09 | 2023-11-09 | Friction torque testing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311490990.7A CN117451236B (en) | 2023-11-09 | 2023-11-09 | Friction torque testing method |
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| SE528675C2 (en) * | 2005-01-21 | 2007-01-16 | Atlas Copco Tools Ab | Torque Sensor unit |
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| DE19920793A1 (en) * | 1999-05-06 | 2000-12-07 | Oezsoy Fazil | Variable torque clutch |
| CN2483150Y (en) * | 2001-05-16 | 2002-03-27 | 张珍财 | Automatic recovering connector and turning knob combined body for tool |
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| CN117451236A (en) | 2024-01-26 |
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