Clamping structure of thread fastening testing machine

Abstract

The utility model relates to the technical field of testing machines, in particular to a clamping structure of a thread fastening testing machine, solves the technical problem that a sleeve is frequently replaced when a worker detects bolts or nuts with different sizes, and particularly relates to a testing machine and a motor output shaft arranged in the testing machine. A clamping mechanism for locking a bolt or a nut is arranged at one end of an output shaft of the motor; the clamping mechanism comprises a sleeve installed at the end of an output shaft of the motor, a concave block is fixed to the end, away from the output shaft of the motor, of the sleeve, a plurality of rectangular grooves are formed in the concave block in the circumferential direction of the concave block, fixing blocks are slidably connected into the rectangular grooves, and a rotating ring is rotationally installed on the sleeve. The rotating ring is provided with a plurality of sets of arc-shaped grooves used in cooperation with the corresponding sliding blocks. According to the utility model, by rotating the rotating ring, the sliding block drives the fixed block to move in the concave block and stops moving when contacting with the surface of the workpiece to be detected, and meanwhile, the workpiece to be detected is fixed in the concave block, which is beneficial for subsequent workers to detect bolts or nuts of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of testing machines, in particular to a clamping structure of a threaded fastening testing machine. Background Art

[0002] The thread tightening test machine drives the bolt or nut to rotate relative to each other at high speed, thereby measuring parameters such as preload, total torque, partial torque and rotation angle during the thread tightening process and calculating and analyzing the quality and tightening performance of the threaded fasteners. When using the thread tightening test machine, the bolt or nut to be tested will be fixed on the motor output shaft through a sleeve, the workpiece to be tested will be fixed in the thread tightening test machine, and the thread tightening test machine will be started, so that relative rotation occurs between the two, and real-time data is obtained through the sensor.

[0003] When using the above-mentioned threaded tightening tester, when measuring bolts or nuts of different sizes, it is necessary to use a sleeve of the corresponding size to fix the bolt or nut to be tested on the motor output shaft. Since the daily inspection volume of the inspectors is large, frequent replacement of sleeves is not convenient for daily work. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a clamping structure for a threaded fastening testing machine, which solves the technical problem of frequent replacement of sleeves when workers detect bolts or nuts of different sizes, thereby speeding up the workers' measurement of bolts and nuts of different sizes.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A threaded fastening test machine clamping structure comprises a test machine and a motor output shaft arranged in the test machine, wherein one end of the motor output shaft is provided with a clamping mechanism for locking a bolt or a nut;

[0007] The clamping mechanism includes a sleeve installed at the end of the motor output shaft, a concave block is fixed at the end of the sleeve away from the motor output shaft, and a plurality of groups of rectangular grooves are provided along the circumferential direction of the concave block, a fixed block is slidably connected in the rectangular groove, a slider is fixed on the fixed block, a rotating ring is rotatably installed on the sleeve, and a plurality of groups of arc grooves used in conjunction with corresponding sliders are provided on the rotating ring, and a locking member for limiting the self-deflection of the rotating ring is provided between the rotating ring and the sleeve.

[0008] Furthermore, the locking member includes a groove arranged on the side of the rotating ring away from the concave block, and an elastic component for controlling the rotation direction of the rotating ring is arranged in the groove. A cylinder is arranged on the surface of the sleeve, and a ratchet groove cooperating with the movement of the inclined plate is arranged on the side of the cylinder close to the inclined plate.

[0009] Furthermore, a second spring connected to the sleeve is provided in the cylinder.

[0010] Furthermore, the ratchet grooves are continuously arranged in a circumference on the surface of the cylinder, and the inclined plates slide in the ratchet grooves to form resistance to the reverse rotation of the rotating ring.

[0011] Furthermore, a limiting groove is provided on the surface of the sleeve, and a limiting block sliding on the surface of the limiting groove is provided in the cylinder.

[0012] Furthermore, the elastic component includes an inclined plate rotatably connected in the groove, and a first spring connected to the inclined plate is fixed in the groove.

[0013] Furthermore, the elastic component includes a spring sheet arranged in the groove, and one end of the spring sheet is provided with a top portion sliding on the surface of the ratchet groove.

[0014] By means of the above technical solution, the utility model provides a thread tightening test machine clamping structure, which has at least the following beneficial effects:

[0015] 1. Due to the setting of the clamping mechanism of the utility model, by rotating the rotating ring, the slider drives the fixed block to move in the concave block, and stops moving when it contacts the surface of the workpiece to be detected. At the same time, the workpiece to be detected is fixed in the concave block, which is beneficial for subsequent staff to detect bolts or nuts of different sizes.

[0016] 2. Due to the setting of the limit groove and the limit block of the utility model, the limit block slides in the limit groove, so that the cylinder is rotated under the action of the ratchet groove and the inclined plate, which is beneficial to the cooperation with the clamping mechanism. During the tightening process, the rotating ring can only rotate in one direction, which is beneficial to keep the workpiece to be inspected stable during the inspection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0018] In the attached picture:

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0021] Figure 3 It is a side sectional schematic diagram of the clamping mechanism of the utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the locking member of the utility model;

[0023] Figure 5 for Figure 4 An enlarged schematic diagram of structure A of the utility model;

[0024] Figure 6 It is a schematic diagram of the spring structure of the utility model.

[0025] In the figure: 1. testing machine; 2. motor output shaft; 3. clamping mechanism; 31. sleeve; 32. concave block; 33. rotating ring; 34. slider; 35. fixed block; 36. locking member; 361. groove; 362. inclined plate; 363. first spring; 364. cylinder; 365. ratchet groove; 366. second spring; 367. limit groove; 368. limit block; 37. rectangular groove; 38. arc groove; 39. elastic component; 4. spring piece; 5. top. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] When inspectors use a testing machine to detect the threaded fastening data of bolts or nuts, they will put one of the many bolts or nuts to be tested into a sleeve, and connect the other end of the sleeve to the motor output shaft through a square head interface, and start the testing machine to make the bolt and nut rotate rapidly, so as to detect the threaded fastening parameters between the bolt and the nut. When inspectors detect different types of bolts or nuts, they need to use corresponding sleeves to connect the bolts or nuts to the motor output shaft, and a large number of bolts or nuts to be tested require more time for inspectors, which affects the normal work of inspectors using the testing machine to detect bolts or nuts. Based on this, the following solution is provided for the above problem.

[0028] Example 1

[0029] The existing testing machine connects bolts or nuts of different sizes through sleeves, which causes inconvenience to the testing work of the test personnel. This embodiment provides a clamping structure of a threaded fastening testing machine, such as Figure 1-Figure 5 As shown, it comprises a testing machine 1 and a motor output shaft 2 arranged in the testing machine 1, and a clamping mechanism 3 for locking a bolt or a nut is provided at one end of the motor output shaft 2;

[0030] The clamping mechanism 3 includes a sleeve 31 installed at the end of the motor output shaft 2, and a concave block 32 is fixed to the end of the sleeve 31 away from the motor output shaft 2. The concave block 32 has multiple groups of rectangular grooves 37 along its circumferential direction. A fixed block 35 is slidably connected in the rectangular groove 37, and a slider 34 is fixed on the fixed block 35. A rotating ring 33 is rotatably installed on the sleeve 31, and multiple groups of arc grooves 38 used in conjunction with corresponding sliders 34 are provided on the rotating ring 33. A locking piece 36 for limiting the self-deflection of the rotating ring 33 is provided between the rotating ring 33 and the sleeve 31. When working, the inspector puts a bolt or nut to be inspected into the concave block 32, and rotates the rotating ring 33 to rotate a certain angle. At this time, the slider 34 rotates The movable ring 33 slides between the concave block 32, and the slider 34 is located in the arc groove 38 and the rectangular groove 37. When the rotating ring 33 drives the arc groove 38 to move, the arc groove 38 squeezes the slider 34, and the position of the slider 34 in the rectangular groove 37 is displaced. The rotating ring 33 can be rotated in the opposite direction to make the slider 34 drive the fixed block 35 to reciprocate in the concave block 32, and the slider 34 drives the fixed block 35 to contact the surface of the bolt or nut to be tested, and keep the fixed block 35 in the position of the concave block 32, so that the bolt or nut to be tested is fixed in the concave block 32, which is beneficial for the inspector to use the testing machine 1 to detect bolts or nuts of different sizes, thereby improving the work efficiency of the inspector.

[0031] The locking member 36 includes a groove 361 provided on the side of the rotating ring 33 away from the concave block 32, and an elastic component 39 for controlling the rotation direction of the rotating ring 33 is provided in the groove 361. The elastic component 39 includes an inclined plate 362 rotatably connected to the groove 361, and a first spring 363 connected to the inclined plate 362 is fixed in the groove 361. The surface of the sleeve 31 is provided with a cylinder 364, and a ratchet groove 365 for cooperating with the movement of the inclined plate 362 is provided on the side of the cylinder 364 close to the inclined plate 362. Since one end of the inclined plate 362 rotates in the groove 361 and the other end is connected to the inclined plate 362, The first spring 363 is fixedly connected and fixed in the groove 361, so that the inclined plate 362 in the initial state remains in an inclined state, and the inclination direction is the same as the direction of the ratchet groove 365. When the rotating ring 33 is rotated clockwise, the slider 34 drives the fixed block 35 to clamp the bolt or nut to be tested, and the rotating ring 33 drives the inclined plate 362 to slide on the surface of the ratchet groove 365, so that the inspector can fix the bolt or nut to be tested in the concave block 32, which is conducive to the inspector obtaining accurate data when testing the bolt or nut.

[0032] A second spring 366 connected to the sleeve 31 is provided in the cylinder 364. Since a ratchet groove 365 is provided on one side of the cylinder 364, when the inspector needs to remove the bolt or nut to be inspected from the concave block 32, the cylinder 364 can be manually pulled to squeeze the second spring 366, so that the ratchet groove 365 is separated from the inclined plate 362, so that the rotating ring 33 can be smoothly rotated in the opposite direction to quickly remove the bolt or nut to be inspected.

[0033] The ratchet grooves 365 are arranged continuously in a circle on the surface of the cylinder 364, and the inclined plate 362 slides on the surface of the ratchet grooves 365 to form resistance to the reversal of the rotating ring 33. When the rotating ring 33 rotates clockwise, the inclined plate 362 will slide on the surface of the ratchet grooves 365 and repeatedly squeeze the first spring 363. The inclined plate 362 will also continue to perform a reset movement under the action of the first spring 363. When the bolt or nut to be tested is clamped, the tested bolt or nut will drive the rotating ring 33 to move in the reverse direction. At this time, one end of the inclined plate 362 is in close contact with the surface of the ratchet groove 365, and the inclined plate 362 will not squeeze the first spring 363 at this time, so that the rotating ring 33 has a unidirectional property when it rotates clockwise to clamp the bolt or nut to be tested.

[0034] A limit groove 367 is provided on the surface of the sleeve 31, and a limit block 368 sliding in the limit groove 367 is provided in the cylinder 364. When the surfaces of the inclined plate 362 and the ratchet groove 365 are squeezed against each other, a certain reaction force is generated on the cylinder 364, so that the cylinder 364 has a tendency to rotate. When the limit block 368 moves in the limit groove 367, the cylinder 364 can only move axially on the surface of the sleeve 31, thereby preventing the cylinder 364 from rotating on its own, causing the rotating ring 33 to lose its unidirectionality when rotating clockwise, which is beneficial to maintaining the stability of the testing machine 1 when detecting bolts or nuts.

[0035] Example 2

[0036] During the compression and reset process, the first spring 363 repeatedly drives the inclined plate 362 to move on the surface of the ratchet groove 365. However, due to the characteristics of the first spring 363 itself, the first spring 363 applies a thrust to the inclined plate 362, which is tightly pressed against the surface of the ratchet groove 365, and a collision occurs between the two during the sliding process, which is easy to damage the inclined plate 362. Based on Example 1, Figure 6 As shown, the elastic component 39 includes a spring piece 4 arranged in the groove 361 , and one end of the spring piece 4 is provided with a top 5 sliding on the surface of the ratchet groove 365 .

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A threaded fastening test machine clamping structure, comprising a test machine (1) and a motor output shaft (2) arranged in the test machine (1), characterized in that: One end of the motor output shaft (2) is provided with a clamping mechanism (3) for locking a bolt or a nut; The clamping mechanism (3) comprises a sleeve (31) mounted on the end of the motor output shaft (2); a concave block (32) is fixed to one end of the sleeve (31) away from the motor output shaft (2); a plurality of rectangular grooves (37) are provided on the concave block (32) along its circumferential direction; a fixed block (35) is slidably connected in the rectangular groove (37); a slider (34) is fixed on the fixed block (35); a rotating ring (33) is rotatably mounted on the sleeve (31); a plurality of arc grooves (38) are provided on the rotating ring (33) for use with corresponding sliders (34); a locking member (36) is provided between the rotating ring (33) and the sleeve (31) for limiting the self-deflection of the rotating ring (33).

2. The thread tightening test machine clamping structure according to claim 1, characterized in that: The locking member (36) comprises a groove (361) arranged on the side of the rotating ring (33) away from the concave block (32), an elastic component (39) for controlling the rotation direction of the rotating ring (33) is arranged in the groove (361), a cylinder (364) is arranged on the surface of the sleeve (31), and a ratchet groove (365) for cooperating with the movement of the inclined plate (362) is arranged on the side of the cylinder (364) close to the inclined plate (362).

3. The thread tightening test machine clamping structure according to claim 2, characterized in that: A second spring (366) connected to the sleeve (31) is arranged inside the cylinder (364).

4. The thread tightening test machine clamping structure according to claim 2, characterized in that: The ratchet grooves (365) are continuously arranged in a circumference on the surface of the cylinder (364), and the inclined plate (362) slides in the ratchet grooves (365) to form resistance to the reverse rotation of the rotating ring (33).

5. The thread tightening test machine clamping structure according to claim 2, characterized in that: A limiting groove (367) is provided on the surface of the sleeve (31), and a limiting block (368) is provided in the cylinder (364) and slides on the surface of the limiting groove (367).

6. The thread tightening test machine clamping structure according to claim 2, characterized in that: The elastic component (39) comprises an inclined plate (362) rotatably connected in the groove (361), and a first spring (363) connected to the inclined plate (362) is fixed in the groove (361).

7. The thread tightening test machine clamping structure according to claim 2, characterized in that: The elastic component (39) comprises a spring sheet (4) arranged in the groove (361), and one end of the spring sheet (4) is provided with a top portion (5) that slides on the surface of the ratchet groove (365).

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