Torque wrench testing limiting device
By using a limiting device consisting of a slider and a hard rubber concave wheel in the torque wrench test, the problems of slippage and scraping during the torque wrench test are solved, achieving multi-directional limiting and improved safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORBAR TORQUE TOOLS (SHANGHAI) LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-07-31
AI Technical Summary
During the testing of existing torque wrenches, the limiting component, which is a fixed metal column, causes surface damage and slippage of the torque wrench, posing a safety hazard.
The limiting components include a sliding block with a transmission sleeve and a hard rubber concave wheel. Multi-directional limiting is achieved by adjusting the components, and sliding friction is converted into rolling friction to avoid scratching.
It effectively prevents torque wrench slippage and rebound, reduces surface damage, and improves testing safety and accuracy.
Smart Images
Figure CN224581060U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of torque wrench testing technology, and in particular to a limiting device for torque wrench testing. Background Technology
[0002] A torque wrench is a tool specifically designed for the precise control and measurement of the tightening torque of fasteners such as bolts and nuts. As the usage time increases, the torque reading of the torque wrench may become inaccurate, so it is necessary to frequently check and calibrate the torque of the torque wrench.
[0003] In the prior art, when testing a torque wrench using a tester, the plug of the torque wrench needs to be inserted into the pressure hole on the pressure seat at the top of the tester first. Then, the handle of the torque wrench is pushed by the limiting component to achieve the rotation of the torque wrench.
[0004] Currently, most limiting components are metal columns fixed on the slider, such as the torque testing device disclosed in CN219641137U. In actual testing, because the torque wrench rotates continuously, the contact position between the torque wrench and the metal column will continuously change. During this process, the metal column will continuously scrape against the surface of the torque wrench, which can easily cause damage to the surface of the torque wrench. In addition, the metal column cannot limit the torque wrench in the vertical direction. If the torque wrench slips due to excessive test torque during the testing process, the torque handle that is not effectively limited is prone to rebound and cause injury.
[0005] Therefore, it is necessary to invent a limiting device for torque wrench testing to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a limiting device for torque wrench testing. This device can provide multi-directional limiting during torque wrench testing, thereby preventing slippage and rebound. Furthermore, by changing sliding friction to rolling friction, and combining this with the inherent material of the hard rubber concave wheel, it avoids scratching the torque wrench handle, resulting in better practical performance. This addresses the problem mentioned in the background art where existing limiting components are mostly a metal column fixed to a slider. During actual testing, because the torque wrench rotates continuously, the contact position between the torque wrench and the metal column constantly changes. During this process, the metal column continuously scratches the surface of the torque wrench, easily causing damage. Additionally, the metal column cannot provide vertical limiting for the torque wrench. If the torque wrench slips due to excessive testing torque during the test, the unlimited torque handle is prone to rebound and injury.
[0007] According to one aspect of this disclosure, the following technical solution is provided: a limiting device for testing torque wrenches, comprising:
[0008] A test assembly for performing torque testing on a torque wrench;
[0009] An adjustment component, wherein the adjustment component is used to adjust the distance between the limiting component and the test component and to move the limiting component; and
[0010] The limiting component includes a slider that is driven sleeved on the outside of the lead screw and slidably sleeved on the outside of the guide rail. The top front end of the slider has an installation groove. A rotating shaft is rotatably nested at the center of the inner side of the installation groove via a bearing. A hard rubber concave wheel is fixedly sleeved on the outside of the rotating shaft. A limiting groove is formed in the middle of the outer side of the hard rubber concave wheel.
[0011] According to at least one embodiment of the torque wrench testing limiting device of the present disclosure, the testing component includes a base, a display connected to the base, a testing instrument fixedly disposed on the top left side of the base, and a pressure bearing seat detachably disposed at the top center of the testing instrument, the pressure bearing seat having a pressure bearing hole at the top center.
[0012] According to at least one embodiment of the torque wrench testing limiting device of the present disclosure, the testing component further includes a column fixedly disposed at the rear right side of the top of the base and a plurality of locking holes opened on the top of the base and evenly arranged with the column as the axis.
[0013] According to at least one embodiment of the torque wrench testing limiting device of the present disclosure, the adjusting assembly includes an adjusting base plate rotatably sleeved on the outside of the column via a bearing, two upright plates are fixedly disposed on the top of the adjusting base plate, and a guide rail is fixedly disposed between the two upright plates, the guide rail being fixedly disposed on the top of the adjusting base plate.
[0014] According to at least one embodiment of the torque wrench testing limiting device of the present disclosure, a lead screw is rotatably nested between the two upright plates via a bearing, and a handwheel is fixedly sleeved at the outer front end of the lead screw.
[0015] According to at least one embodiment of the torque wrench testing limiting device of the present disclosure, a locking pin is slidably provided through the top front end of the adjusting base plate in the vertical direction, and a limiting handle fixedly connected to the adjusting base plate is provided directly above the locking pin.
[0016] The technical effects and advantages of this utility model are as follows:
[0017] This invention can limit the torque wrench in multiple directions during the testing process, thereby preventing it from slipping and rebounding. In addition, by changing sliding friction to rolling friction, and in combination with the material of the hard rubber concave wheel itself, it can prevent scratching of the torque wrench handle, resulting in better actual use. Attached Figure Description
[0018] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the description thereof, serve to explain the principles of the present disclosure. These drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification.
[0019] Figure 1 This is a schematic diagram of the overall structure of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0020] Figure 2 This is a schematic diagram of the test assembly and adjustment assembly of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0021] Figure 3 This is a schematic diagram of the limit assembly structure of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0022] The specific labels in the attached figures are as follows:
[0023] 1. Test components; 11. Base; 12. Tester; 13. Column; 14. Locking hole;
[0024] 2. Adjustment assembly; 21. Adjustment base plate; 22. Vertical plate; 23. Guide rail; 24. Lead screw; 25. Handwheel; 26. Locking pin; 27. Limit handle;
[0025] 3. Limiting component; 31. Slider; 32. Mounting groove; 33. Rotating shaft; 34. Hard rubber concave wheel. Detailed Implementation
[0026] For descriptive purposes, this disclosure may use spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side (e.g., in a “sidewall”)” to describe the relationship between one component and another component as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, the spatial relative terms are also intended to encompass different orientations of the device during use, operation, and / or manufacture. For example, if the device in the drawings is flipped, a component described as “below” or “under” other components or features would subsequently be positioned “above” said other components or features. Thus, the exemplary term “below” can encompass both “above” and “below” orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.
[0027] Figure 1 This is a schematic diagram of the overall structure of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0028] Figure 2 This is a schematic diagram of the test assembly 1 and adjustment assembly 2 of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0029] Figure 3 This is a schematic diagram of the limit component 3 of a torque wrench testing limit device according to one embodiment of the present disclosure.
[0030] like Figures 1-3 As shown, the torque wrench testing limit device disclosed herein may include: a test component 1 for testing the torque of the torque wrench, an adjustment component 2 for adjusting the distance between the limit component 3 and the test component 1 and for driving the limit component 3 to move, and other components such as the limit component 3.
[0031] like Figure 2 As shown in this disclosure, the test component 1 includes a base 11, a display connected to the base 11, a tester 12 fixedly mounted on the top left side of the base 11, a pressure seat detachably mounted at the top center of the tester 12, and a pressure hole opened at the top center of the pressure seat. If the torque wrench to be tested is of different specifications, it can be adapted by replacing the detachable pressure seat on the top of the tester 12. The tester 12, the pressure seat and the display are all existing technologies, so they will not be described in detail here. The test component 1 also includes a column 13 fixedly mounted on the rear right side of the top of the base 11 and a plurality of locking holes 14 opened on the top of the base 11 and evenly arranged with the column 13 as the axis. The spacing between adjacent locking holes 14 corresponds to a rotation angle of 5°-10°, which facilitates fine adjustment.
[0032] like Figure 2As shown, in a preferred embodiment, the adjustment assembly 2 includes an adjustment base plate 21 that is rotatably sleeved on the outside of the column 13 via bearings. Two upright plates 22 are fixedly mounted on the top of the adjustment base plate 21, and a guide rail 23 is fixedly mounted between the two upright plates 22. The guide rail 23 is fixedly mounted on the top of the adjustment base plate 21. A lead screw 24 is rotatably nested between the two upright plates 22 via bearings. A handwheel 25 is fixedly sleeved on the outer front end of the lead screw 24 so that the handwheel 25 can be rotated at a constant speed at the start of the test. When the handwheel 25 rotates, it drives the lead screw 24 to rotate continuously, thereby causing the slider 31 guided by the guide rail 23 to move. A locking pin 26 is slidably inserted through the top front end of the adjustment base plate 21 in the vertical direction. A limiting handle 27 fixedly connected to the adjustment base plate 21 is provided directly above the locking pin 26.
[0033] In addition, to accommodate torque handles of different lengths, the operator can lift the locking pin 26 upwards while holding the limiting handle 27. At this time, the limiting handle 27 can limit the locking pin 26 from above, preventing the locking pin 26 from coming out of the mounting hole on the adjusting base plate 21. After the bottom end of the locking pin 26 moves out from the inside of the adjacent locking hole 14 to release the lock, the limiting handle 27 drives the adjusting base plate 21 to rotate left or right around the column 13 as the axis, thereby adjusting the distance between the slider 31 and the tester 12 to accommodate the detection of torque handles of different lengths. After the adjustment is completed, the bottom end of the locking pin 26 is inserted into the inside of the adjacent locking hole 14 to form a lock again.
[0034] like Figure 3 As shown in this disclosure, the limiting component 3 includes a slider 31 that is sleeved on the outside of the lead screw 24 and slidably sleeved on the outside of the guide rail 23. The top front end of the slider 31 has an installation groove 32. A rotating shaft 33 is rotatably nested at the center of the inner side of the installation groove 32 through a bearing. A hard rubber concave wheel 34 is fixedly sleeved on the outside of the rotating shaft 33. A limiting groove is formed in the middle of the outer side of the hard rubber concave wheel 34. It should be noted that before testing, the status of each component of the equipment should be checked to ensure that the tester 12 is powered on normally, the display is securely connected and can display data normally, and whether the lead screw 24 rotates smoothly, whether there are any foreign objects stuck on the surface of the guide rail 23, and whether the hard rubber concave wheel 34 has any cracks or deformation.
[0035] Therefore, to facilitate actual testing, the torque value of the torque wrench is first set, then the plug of the torque wrench is inserted into the pressure hole on the pressure seat at the top of the testing instrument 12. The handle of the torque wrench is placed on top of the slider 31, aligning it with the limiting groove on the outer side of the hard rubber concave wheel 34. Then, the handwheel 25 continuously drives the lead screw 24 to rotate. When the lead screw 24 rotates, it drives the slider 31, guided by the guide rail 23, to move backward. When the slider 31 moves backward, it drives the hard rubber concave wheel 34 to move backward through the rotating shaft 33. This causes the handle of the torque wrench to gradually enter the inner side of the limiting groove and be vertically limited by the limiting groove. At the same time, when the handle of the torque wrench contacts the inner wall of the limiting groove, as the hard rubber concave wheel 34 continues to move backward... The hard rubber concave wheel 34 moves and pushes the handle of the torque wrench, causing the torque wrench to rotate. During this process, the hard rubber concave wheel 34 rotates continuously due to changes in the contact position with the torque wrench. When the torque wrench emits an alarm sound, the handwheel 25 is no longer rotated. At this time, the value displayed on the monitor is observed and compared with the torque wrench setting value to determine the difference in torque wrench value. Compared with the prior art, this utility model can form multi-directional limits on the torque wrench during the torque wrench test, thereby preventing it from slipping and rebounding. In addition, by changing sliding friction to rolling friction, and combined with the material of the hard rubber concave wheel 34 itself, it avoids scratching the torque wrench handle, resulting in better actual use effect.
[0036] It should also be noted that any content not described in detail in this specification is prior art known to those skilled in the art.
[0037] Those skilled in the art should understand that the above embodiments are merely for illustrating the present disclosure and are not intended to limit the scope of the disclosure. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present disclosure.
Claims
1. A limiting device for testing torque wrenches, characterized in that, include: A test assembly for performing torque testing on a torque wrench; An adjustment component, wherein the adjustment component is used to adjust the distance between the limiting component and the test component and to move the limiting component; and The limiting component includes a slider that is driven sleeved on the outside of the lead screw and slidably sleeved on the outside of the guide rail. The top front end of the slider has an installation groove. A rotating shaft is rotatably nested at the center of the inner side of the installation groove via a bearing. A hard rubber concave wheel is fixedly sleeved on the outside of the rotating shaft. A limiting groove is formed in the middle of the outer side of the hard rubber concave wheel.
2. The limiting device for torque wrench testing according to claim 1, characterized in that: The testing component includes a base, on which a display is connected. A testing instrument is fixedly mounted on the top left side of the base. A pressure-bearing seat is detachably mounted at the top center of the testing instrument, and a pressure-bearing hole is opened at the top center of the pressure-bearing seat.
3. The limiting device for torque wrench testing according to claim 2, characterized in that: The test assembly also includes a column fixedly installed at the rear right side of the top of the base and multiple locking holes evenly arranged on the top of the base with the column as the axis.
4. The limiting device for torque wrench testing according to claim 3, characterized in that: The adjustment assembly includes an adjustment base plate that is rotatably sleeved on the outside of the column via a bearing. Two upright plates are fixedly installed on the top of the adjustment base plate, and a guide rail is fixedly installed between the two upright plates. The guide rail is fixedly installed on the top of the adjustment base plate.
5. The limiting device for torque wrench testing according to claim 4, characterized in that: A lead screw is nested between the two upright plates via a bearing, and a handwheel is fixedly sleeved at the outer front end of the lead screw.
6. The limiting device for torque wrench testing according to claim 5, characterized in that: A locking pin is slidably provided through the top front end of the adjusting base plate in a vertical direction, and a limiting handle that is fixedly connected to the adjusting base plate is provided directly above the locking pin.