Vertical torque testing device

Abstract

The invention discloses a vertical torque testing device which comprises a testing machine body, a stand column is arranged on the testing machine body, a testing main shaft is rotationally hung on one side of the top end of the stand column, a driving balance assembly for driving the testing main shaft to rotate, ascend and descend and keep balance is arranged at the top end of the stand column, and a counter-force arm is connected between the stand column and the testing main shaft at the same time; the impact wrench torque testing device further comprises a testing tool, the testing tool is arranged below the testing main shaft in a sliding mode, and when the testing tool is far away from the testing main shaft, actual torque testing of the impact wrench is conducted through the testing tool. When the testing tool slides to the position under the testing main shaft, the testing main shaft is pulled downwards to be matched with the testing tool for torque accuracy testing. The device is convenient to operate, the torque of tools such as an impact wrench is measured by adopting a reproduction method, errors are reduced, a tester can conveniently operate the tools such as the impact wrench, data are collected and processed in real time, and the rated torque of the wrench can be accurately measured.

Description

Technical Field

[0001] This invention relates to a vertical torque testing device, belonging to the field of torque testing technology. Background Technology

[0002] In precision manufacturing fields such as automotive assembly and aerospace, torque deviations in impact wrenches and screwdrivers can lead to bolt connection failures, resulting in product scrapping or structural safety risks. For example, when there is a significant difference between dynamic torque (the peak value during tightening) and static torque (the re-inspection value after tightening), testing is required to ensure that the final tightening effect meets the standards.

[0003] The torque testing of existing impact wrenches, impact screwdrivers, etc., is all done by manually turning the torque wrench. The measured rated torque has a large error and cannot be guaranteed to be repeatable. It is necessary to convert the torque to obtain the required torque value, which is time-consuming and laborious.

[0004] Therefore, there is an urgent need in the field for a testing device that can quickly and accurately measure the rated torque of impact wrenches and impact screwdrivers and meet the requirements for repeatability testing. Summary of the Invention

[0005] The technical problem to be solved by the present invention is how to provide a torque measuring device that is easy to operate, has high measurement accuracy, strong repeatability, and meets the requirements of assembly line testing.

[0006] To achieve the above-mentioned technical objectives and effects, this application provides the following technical solution: A vertical torque testing device includes a testing body, a column on the testing body, a testing spindle rotatably suspended on one side of the top of the column, a drive balancing component at the top of the column to drive the testing spindle to rotate and lift and maintain balance, and a reaction arm connected between the column and the testing spindle. It also includes a test fixture, which is slidably positioned below the test spindle. When the test fixture is away from the test spindle, the actual torque of the impact wrench is tested through the test fixture. When the test fixture is slid directly below the test spindle, the test spindle is pulled down to cooperate with the test fixture to test the torque accuracy.

[0007] Preferably, the test body includes a mother test stand, a daughter test stand, and a table surface. The table surface is disposed on the mother test stand, the column is disposed on the table surface, the daughter test stand is embedded in the mother test stand and can be separated by pulling and sliding, and both the mother test stand and the daughter test stand are provided with lockable casters at the bottom.

[0008] Furthermore, the testing fixture includes a standard test bolt, a standard test nut, a standard test washer, an upper clamp, and a lower clamp. The lower clamp is disposed on the sub-test platform, the standard test bolt is placed on the lower clamp, the upper clamp is detachably disposed on the lower clamp and clamps and fixes the standard test bolt, the head end of the threaded portion of the standard test bolt protrudes from the upper clamp, the standard test nut is screwed to the portion of the standard test bolt that protrudes from the upper clamp, and the standard test washer is sleeved on the outside of the standard test bolt and located between the upper clamp and the standard test nut.

[0009] Furthermore, both the upper clamp and the lower clamp are cylindrical, with the outer diameter of the upper clamp being smaller than that of the lower clamp. Several graduated strips are evenly spaced on the top surface of the lower clamp, located on the outer ring of the upper clamp. An arrow pointer is provided on the standard test nut.

[0010] Preferably, the drive balancing assembly includes a rotating head and a balancing hanger. The rotating head is disposed at the top of the column and has a horizontal arm extending in a direction away from the column. The balancing hanger is hung on the horizontal arm by a hook, and the test spindle is disposed on the balancing hanger.

[0011] Furthermore, the test spindle includes a high-precision servo motor, a high-precision sensor, a planetary gear assembly, and a torque output end. The high-precision servo motor is suspended on the balance crane, and the output shaft of the high-precision servo motor is poweredly connected to the planetary gear assembly through the high-precision sensor. The power end of the planetary gear assembly is poweredly connected to the torque output end.

[0012] Furthermore, the cross arm is provided with a plurality of lifting holes at intervals along the direction away from the column, and the balance hanger is provided on any of the lifting holes.

[0013] Furthermore, the rotating head has a rotating part, which is rotatably sleeved on the outer wall of the top of the column, and a locking bolt is screwed onto the outer wall of the rotating part.

[0014] The vertical torque testing device provided by this invention has the following advantages: 1. This invention is easy to operate. It uses a reproduction method to measure the torque of tools such as impact wrenches, reducing the occurrence of errors. It uses a high-precision torque sensor to collect and process data in real time, which can accurately measure the rated torque of the wrench.

[0015] 2. After the sub-test platform of this invention is removed, it is convenient for testers to operate tools such as impact wrenches. Attached Figure Description

[0016] Figure 1 A side view of a vertical torque testing device provided in an embodiment of the present invention; Figure 2This is a top view of a vertical torque testing device provided in an embodiment of the present invention; Figure 3 This is an exploded view of the main test body structure of the present invention; Figure 4 This is a front view of the test fixture provided in an embodiment of the present invention; Figure 5 This is a schematic cross-sectional view of the test fixture provided in an embodiment of the present invention; Figure 6 A top view of the test fixture provided in an embodiment of the present invention; Figure 7 This is a front view of the test spindle provided in an embodiment of the present invention.

[0017] In the picture: 1-Test body; 11-Main test stand; 12-Daughter test stand; 13-Table surface; 2-Column; 3-Test spindle; 31-High-precision servo motor; 32-High-precision sensor; 33-Planetary gear assembly; 34-Torque output end; 4-Drive balancing assembly; 41-Rotating head; 411-Horizontal arm; 4111-Lifting hole; 412-Transfer unit; 42-Balanced hanger; 5-Reaction arm; 6-Test fixture; 61-Standard test bolt; 62-Standard test nut; 63-Standard test washer; 64-Upper clamp; 65-Lower clamp; 7-Scale bar; 8-Arrow pointer; 9-Locking bolt. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Reference Figures 1-3 A vertical torque testing device includes a testing body 1, a column 2, a testing spindle 3, a drive balancing assembly 4, a reaction arm 5, and a testing fixture 6.

[0020] The column 2 is mounted on the test body 1. The test spindle 3 is rotatably suspended from the top of the column 2 via a drive balancing assembly 4. The drive balancing assembly 4 can drive the test spindle 3 to rotate and rise while maintaining its balance. A reaction arm 5 is connected between the column 2 and the test spindle 3 to absorb the reaction force generated by impact wrenches, impact screwdrivers, and other testing instruments during operation, thereby improving operational stability, reducing labor intensity, and ensuring assembly accuracy. The test fixture 6 is slidably positioned below the test spindle 3. When the test fixture 6 is away from the test spindle 3, the actual torque of the impact wrench is tested through the test fixture 6. When the test fixture 6 is slid directly below the test spindle 3, it pulls down the test spindle 3 to cooperate with the test fixture 6 for torque accuracy testing. By comparing the two torque values, it is possible to calculate whether the torque value of the impact wrench and other tools meets the requirements.

[0021] Reference Figures 1-6 The test body 1 includes a mother test platform 11, a daughter test platform 12 and a table surface 13. The table surface 13 is detachably installed on the mother test platform 11 by bolts. The column 2 is fixed to the table surface 13 by bolt connection or welding. The daughter test platform 12 is embedded in the mother test platform 11 and can be separated by pull-out sliding. Both the mother test platform 11 and the daughter test platform 12 are equipped with lockable casters at the bottom.

[0022] The test fixture 6 includes a standard test bolt 61, a standard test nut 62, a standard test washer 63, an upper clamp 64, and a lower clamp 65. The lower clamp 65 is fixedly installed on the sub-test table 12. The head of the standard test bolt 61 is embedded in the lower clamp 65. The upper clamp 64 is detachably installed on the lower clamp 65 by bolts and clamps and fixes the standard test bolt 61. The head of the threaded part of the standard test bolt 61 protrudes from the upper clamp 64. The standard test nut 62 is screwed to the part of the standard test bolt 61 that protrudes from the upper clamp 64. The standard test washer 63 is sleeved on the outside of the standard test bolt 61 and is located between the upper clamp 64 and the standard test nut 62.

[0023] In a further embodiment, both the upper clamp 64 and the lower clamp 65 are cylindrical. The outer diameter of the upper clamp 64 is smaller than that of the lower clamp 65. Several scale bars 7 are evenly spaced on the top surface of the lower clamp 65 on the outer ring of the upper clamp 64. An arrow pointer 8 is engraved on the standard test nut 62 to facilitate quick confirmation of the torque value.

[0024] Reference Figures 1-7The drive balancing assembly 4 includes a rotating head 41 and a balancing hanger 42. The rotating head 41 is mounted on the top of the column 2 and has a horizontal arm 411 extending away from the column 2. The balancing hanger 42 is hung on the horizontal arm 411 via a hook. The test spindle 3 is suspended on the balancing hanger 42, thereby enabling the test spindle 3 to move smoothly up and down. When the rotating head 41 rotates, the balancing hanger 42 drives the test spindle 3 to rotate accordingly. In this embodiment, the structure and application of the balancing hanger 42 are existing technologies and will not be described in detail.

[0025] Specifically, the test spindle 3 includes a high-precision servo motor 31, a high-precision sensor 32, a planetary gear assembly 33, and a torque output end 34. The high-precision servo motor 31 is suspended on a balance crane 42. The output shaft of the high-precision servo motor 31 is powered by the planetary gear assembly 33 through the high-precision sensor 32. The power end of the planetary gear assembly 33 is powered by the torque output end 34. The planetary gear assembly 33, through the meshing relationship of the sun gear, planet gears, and ring gear, converts the high speed and low torque output of the high-precision servo motor 31 into low speed and high torque, meeting the torque requirements of the test equipment. It mainly plays the role of torque transmission, adjustment, and measurement. In this embodiment, the structure and application of the planetary gear assembly 33 are existing technologies and will not be described in detail.

[0026] Furthermore, multiple lifting holes 4111 are spaced apart on the cross arm 411 along the direction away from the column 2, and the balance hanger 42 is hung on any of the lifting holes 4111, which improves the adaptability of the testing device; the rotating head 41 has a rotating part 412, which is rotatably sleeved on the top outer wall of the column 2, and a locking bolt 9 is screwed on the outer wall of the rotating part 412, which can rotate freely, or can be locked and fixed in the required position by the locking bolt 9.

[0027] The method of using the vertical torque testing device of the present invention is as follows: Place the standard test bolt 61 into the lower clamp 65, fix the upper clamp 64 onto the lower clamp 65, and place the standard test washer 63 and the standard test nut 62 to form the test fixture 6.

[0028] Place the test fixture 6 into the sub-test bench 12 and fix it in place. Use an impact wrench to strike the test fixture 6 and record the rotation distance of the standard test nut 62. This can be recorded by observing the changes in the position of the scale bar 7 and the arrow pointer 8.

[0029] Push the sub-test bench 12 into the mother test bench 11, pull down the test spindle 3, and perform a torque accuracy test on the standard test nut 62. Record the rotation distance, which can be recorded by the change in the position of the scale bar 7 and the arrow pointer 8.

[0030] By comparing the two rotation distances, it can be determined whether the torque of the impact wrench is accurate.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A vertical torque testing device characterized by, The utility model provides a test body (1), which is provided with a stand (2) on the test body (1), a test main shaft (3) is hung on one side of the top end of the stand (2) in a rotating manner, a driving balance assembly (4) is arranged on the top end of the stand (2) and drives the test main shaft (3) to rotate, ascend and descend and keep balance, and a counterforce arm (5) is connected between the stand (2) and the test main shaft (3); the utility model also provides a test tool (6), which is arranged below the test main shaft (3) in a sliding manner; when the test tool (6) is away from the test main shaft (3), the torque of an impact wrench is actually tested through the test tool (6); when the test tool (6) slides to the position directly below the test main shaft (3), the test main shaft (3) is pulled down, and the test tool (6) is used to test the torque accuracy.

2. The vertical torque testing device of claim 1, wherein, The test body (1) comprises a mother test table (11), a daughter test table (12) and a table top (13), the table top (13) is arranged on the mother test table (11), the stand (2) is arranged on the table top (13), and the daughter test table (12) is embedded in the mother test table (11) and can be separated by pulling and sliding; the mother test table (11) and the daughter test table (12) are each provided with a universal wheel with a lock at the bottom.

3. The vertical torque testing device of claim 2, wherein, The test tool (6) comprises a standard test bolt (61), a standard test nut (62), a standard test washer (63), an upper clamp (64) and a lower clamp (65), the lower clamp (65) is arranged on the daughter test table (12), the standard test bolt (61) is arranged on the lower clamp (65), the upper clamp (64) is detachably arranged on the lower clamp (65) and clamps and fixes the standard test bolt (61), the screw rod of the standard test bolt (61) penetrates the upper clamp (64) at the head end, the standard test nut (62) is screwed with the part of the standard test bolt (61) penetrating the upper clamp (64), and the standard test washer (63) is sleeved outside the standard test bolt (61) and located between the upper clamp (64) and the standard test nut (62).

4. The vertical torque testing device of claim 3, wherein, The upper clamp (64) and the lower clamp (65) are both arranged in a cylindrical shape, the outer diameter of the upper clamp (64) is smaller than that of the lower clamp (65), and a plurality of scale bars (7) are evenly arranged on the top surface of the lower clamp (65) and located between the outer circles of the upper clamp (64); the standard test nut (62) is provided with an arrow pointer (8).

5. The vertical torque testing device of claim 1, wherein, The driving balance assembly (4) comprises a rotating head (41) and a balance sling (42), the rotating head (41) is arranged at the top end of the stand (2), the rotating head (41) has a cross arm (411) extending away from the stand (2), the balance sling (42) is hung on the cross arm (411) through a hook, and the test main shaft (3) is arranged on the balance sling (42).

6. The vertical torque testing device of claim 5, wherein, The test spindle (3) comprises a high-precision servo motor (31), a high-precision sensor (32), a planetary gear assembly (33) and a torque output end (34), the high-precision servo motor (31) is hung on the balance hanger (42), the output shaft of the high-precision servo motor (31) is power connected with the planetary gear assembly (33) through the high-precision sensor (32), and the power end of the planetary gear assembly (33) is power connected with the torque output end (34).

7. The vertical torque testing device of claim 5, wherein, A plurality of hanger holes (4111) are arranged on the cross arm (411) in a direction away from the stand column (2), and the balance hanger (42) is hung on any one of the hanger holes (4111).

8. The vertical torque testing device of claim 5, wherein, The rotating head (41) has a rotating setting part (412) which is rotatably sleeved on the outer wall of the top of the stand column (2), and locking bolts (9) are screwed on the outer wall of the rotating setting part (412).

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