Calibrating instrument with overload protection mechanism for detecting torque screwdriver

Abstract

The utility model discloses a calibrating instrument with an overload protection mechanism for detecting a torque screwdriver, and relates to the technical field of torque screwdriver detection. The calibration instrument comprises a calibration instrument body, and a detection table is arranged on the outer surface of the calibration instrument body. According to the utility model, the driving mechanism and the torque screwdriver are supported on the lifting assembly, so that the distance between the torque screwdriver and the detection screw can be adjusted through the lifting assembly, and the external thread of the torque screwdriver is locked with the inner side of the driving mechanism, so that the torque screwdriver can be driven by the driving mechanism to rotate automatically; the position of the torque screwdriver in the vertical direction is kept uniform all the time, it is prevented that the position of the torque screwdriver deviates or the rotating speed changes affect the detection accuracy of the torque value, meanwhile, the torque screwdriver can be rapidly limited through cooperation with the limiting assembly and the telescopic clamping mechanism, and the idling overload protection effect on a detected screw is achieved; the situation that the interior of the detection screw is damaged due to continuous idle friction is prevented.

Description

Technical Field

[0001] This utility model belongs to the field of torque screwdriver testing technology, and specifically relates to a calibration instrument with an overload protection mechanism for torque screwdriver testing. Background Technology

[0002] A torque screwdriver, also called a torque wrench, is a screwdriver with a set torque value. There are two main types commonly used: preset torque screwdrivers and dial-type torque screwdrivers. Preset torque screwdrivers allow you to preset a torque value. When the fastener being tightened reaches the preset torque value, the internal clutch of the screwdriver automatically disengages, and this action can be felt by hand. Even if you continue to apply force, it will not exceed the preset limit. A torque screwdriver calibrator is a device used to test the performance of a torque screwdriver. It typically includes a housing and a torque sensor. The torque sensor is installed inside the housing and has a detection end extending outside the housing. The force-applying end of the torque screwdriver is placed on the detection end of the torque sensor, and the operating handle of the torque screwdriver is rotated to begin the test.

[0003] Currently, torque screwdrivers are usually tested by hand. However, the hand shakes during the process, causing the concentricity to change continuously, which increases the fluctuation of the test data and affects its accuracy. Furthermore, if the test end lacks overload protection, the torque screwdriver may continue to spin without load, potentially damaging the inside of the test end and thus affecting the service life of the calibration instrument.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a calibration instrument with an overload protection mechanism for torque screwdriver testing, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a calibration instrument with an overload protection mechanism for testing torque screwdrivers. It includes a calibration instrument body, a testing platform on the outer surface of the body, a testing plate slidably mounted on the top of the testing platform, a testing screw on the inner wall of the testing plate, a support assembly fixedly mounted on the top of the testing platform, a telescopic clamping mechanism fixedly mounted on one side of the support assembly, a limit assembly threadedly connected to the outer surface of the testing screw, a fixing assembly on the outer surface of the calibration instrument body, a lifting assembly inside the fixing assembly, a driving mechanism on the top of the lifting assembly, and a torque screwdriver threadedly connected to the inner wall of the driving mechanism.

[0008] Furthermore, the top of the testing platform is provided with a sliding groove, the inside of the testing platform is provided with an inner through groove, and the bottom of the testing plate is provided with a sliding plate, which is slidably connected to the inside of the sliding groove.

[0009] Furthermore, the support assembly includes a base plate, and a support plate is fixedly mounted on the top of the base plate;

[0010] The telescopic clamping mechanism includes a spring, one end of which is fixedly mounted with a connecting plate, and a clamping rod and a tapered rod are fixedly mounted on the outer surface of the connecting plate.

[0011] Furthermore, the limiting component includes a threaded disc, and a limiting baffle is provided on the outer surface of the threaded disc, the limiting baffle being distributed in a cross shape on the outside of the threaded disc.

[0012] Furthermore, the fixing component includes a fixing sleeve plate, the fixing sleeve plate having an inner sliding groove inside, and the lifting component extending into the inner sliding groove.

[0013] Furthermore, the lifting assembly includes a lifting screw, which is rotatably mounted on the inner wall of the fixed sleeve plate. A threaded block is threadedly connected to the outer surface of the lifting screw. A horizontal plate is fixedly mounted on one end of the threaded block, and the two sides of the threaded block are slidably connected to the inner wall of the inner groove.

[0014] Furthermore, the drive mechanism includes a drive motor, the output end of which is provided with a drive wheel, one side of which is engaged with a rotating wheel, and the torque screwdriver passes through and is threadedly connected to the inside of the rotating wheel.

[0015] Furthermore, there are several groups of detection screws and threaded discs, and the spacing between each pair of detection screws in each group is equal.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model supports the drive mechanism and torque screwdriver on a lifting assembly, allowing the distance between the torque screwdriver and the detection screw to be adjusted via the lifting assembly. By locking the external thread of the torque screwdriver to the inner side of the drive mechanism, the torque screwdriver can be driven to rotate on its own via the drive mechanism, ensuring that the vertical position of the torque screwdriver remains consistent and preventing positional deviations or speed changes from affecting the accuracy of torque value detection. At the same time, the limit assembly and telescopic clamping mechanism can quickly limit the torque screwdriver, providing overload protection against idling and preventing damage to the internal parts of the detection screw caused by continued idling friction.

[0018] 2. This utility model uses cross-shaped limiting baffles to surround the threaded disc. When the threaded disc rotates, it continuously drives the limiting baffles to rotate, causing adjacent limiting baffles to continuously shift and restrict the tapered rod until the threaded disc stops rotating. After that, the tapered rod is released from restriction, and with the extension and contraction of the spring, the tapered rod extends into the gap between the limiting baffles. At the same time, since the clamping rod is longer than the tapered rod, it can quickly clamp and lock onto the outside of the torque screwdriver to prevent it from continuing to spin freely, reducing the load on the test screw and providing overload protection. The drive motor is fixed to the horizontal plate. When the drive motor is started, it drives the drive wheel to rotate and drives the rotating wheel to rotate, thereby providing the driving force for the torque screwdriver to rotate on its own, reducing the impact of unstable rotation speed and positional deviation caused by hand-held rotation on the test value.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the detection plate structure of this utility model;

[0023] Figure 3 This is a schematic diagram of the torque screwdriver structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the lifting screw structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the testing platform structure of this utility model;

[0026] Figure 6 For the present utility model Figure 5 Enlarged structural diagram at point A in the middle;

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Calibration instrument body; 2. Testing table; 3. Testing plate; 4. Testing screw; 5. Support assembly; 6. Telescopic clamping mechanism; 7. Limiting assembly; 8. Fixing assembly; 9. Lifting assembly; 10. Drive mechanism; 11. Torque screwdriver; 12. Slide groove; 13. Inner through groove; 14. Slide plate; 501. Base plate; 502. Support plate; 601. Spring; 602. Connecting plate; 603. Clamping rod; 604. Tapered rod; 701. Threaded disc; 702. Limiting stop; 801. Fixing sleeve; 802. Inner slide groove; 901. Lifting screw; 902. Threaded block; 903. Horizontal plate; 1011. Drive motor; 1012. Drive wheel; 1013. Rotary wheel. Detailed Implementation

[0029] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0030] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0031] Please see Figures 1-6 As shown, this utility model is a calibration instrument with an overload protection mechanism for testing torque screwdrivers. It includes a calibration instrument body 1, a testing platform 2 on the outer surface of the calibration instrument body 1, a testing plate 3 slidably mounted on the top of the testing platform 2, a testing screw 4 on the inner wall of the testing plate 3, a support assembly 5 fixedly mounted on the top of the testing platform 2, a telescopic clamping mechanism 6 fixedly mounted on one side of the support assembly 5, a limit assembly 7 threadedly connected to the outer surface of the testing screw 4, a fixing assembly 8 on the outer surface of the calibration instrument body 1, a lifting assembly 9 inside the fixing assembly 8, a driving mechanism 10 on the top of the lifting assembly 9, and a torque screwdriver 11 threadedly connected to the inner wall of the driving mechanism 10.

[0032] When the torque screwdriver 11 needs to be tested, it is passed through the lifting assembly 9 and the drive mechanism 10, so that its middle section is locked inside the drive mechanism 10. The test plate 3 is pushed to slide on the top of the test table 2, so that the test screw 4 on its top is displaced, so that the test screw 4 moves directly below the torque screwdriver 11. The torque screwdriver 11 is lowered to the inside of the test end of the test screw 4 by the lifting assembly 9. When testing, the drive mechanism 10 is started to run, so that the torque screwdriver 11 runs together. At this time, the bottom end of the torque screwdriver 11 rubs against the inside of the test screw 4, causing it to rotate. When the test screw 4 rotates, it drives the limiting assembly 7 to rotate. Its telescopic clamping mechanism 6 is blocked to one side by the limiting assembly 7 until the test screw 4 stops rotating. The limiting assembly 7 stops and releases the restriction on the telescopic clamping mechanism 6, so that it quickly extends and retracts towards the torque screwdriver 11 and is locked outside the torque screwdriver 11, so that the torque screwdriver stops rotating for testing.

[0033] This invention supports the drive mechanism 10 and the torque screwdriver 11 on the lifting assembly 9, allowing the distance between the torque screwdriver 11 and the detection screw 4 to be adjusted via the lifting assembly 9. Furthermore, by locking the external threads of the torque screwdriver 11 to the inner side of the drive mechanism 10, the drive mechanism 10 can drive the torque screwdriver 11 to rotate independently, ensuring that the vertical position of the torque screwdriver 11 remains consistent. This prevents positional deviations or speed changes from affecting the accuracy of torque value detection. Simultaneously, the limiting assembly 7 and the telescopic clamping mechanism 6 can quickly restrict the torque screwdriver 11, providing overload protection against idling on the detection screw 4 and preventing damage to the internal components of the detection screw 4 due to continued idling friction.

[0034] In one embodiment, for the above-mentioned testing station 2, a sliding groove 12 is provided on the top of the testing station 2, an inner through groove 13 is provided inside the testing station 2, and a sliding plate 14 is provided at the bottom of the testing plate 3, the sliding plate 14 being slidably connected to the inside of the sliding groove 12.

[0035] By setting the slide groove 12 in conjunction with the slide plate 14 at the bottom of the detection plate 3, the detection plate 3 can be provided with a displacement channel and a limiting function, so that the detection plate 3 can drive the detection screw 4 to move below the torque screwdriver 11 so that the detection screw 4 can be detected directly below the torque screwdriver.

[0036] In one embodiment, the support component 5 includes a base plate 501, and a support plate 502 is fixedly installed on the top of the base plate 501.

[0037] The telescopic clamping mechanism 6 includes a spring 601, one end of which is fixedly mounted with a connecting plate 602, and a clamping rod 603 and a tapered rod 604 are fixedly mounted on the outer surface of the connecting plate 602 respectively.

[0038] The spring 601 and the connecting plate 602 are supported on one side of the limiting component 7 by the base plate 501 and the support plate 502. When the limiting component 7 rotates with the detection screw 4, its outside is pressed against the outside of the tapered rod 604, so that the clamping rod 603 is restricted to one side of the torque screwdriver 11. When the limiting component 7 stops rotating, the tapered rod 604 is released and extends into the gap of the limiting component 7. The clamping rod 603 extends forward together and clamps the outside of the torque screwdriver 11 to achieve a quick restriction effect.

[0039] In one embodiment, the limiting component 7 includes a threaded disc 701, and a limiting baffle 702 is provided on the outer surface of the threaded disc 701. The limiting baffle 702 is distributed in a cross shape on the outside of the threaded disc 701.

[0040] The threaded disc 701 is surrounded by a cross-shaped arrangement of limiting baffles 702. When the threaded disc 701 rotates, it continuously drives the limiting baffles 702 to rotate, so that the adjacent limiting baffles 702 continuously displace and restrict the tapered rod 604 until the threaded disc 701 stops rotating. After that, the restriction on the tapered rod 604 is released, and with the extension and retraction of the spring 601, the tapered rod 604 is pushed to extend into the gap between the limiting baffles 702. At the same time, since the clamping rod 603 is longer than the tapered rod 604, the clamping rod 603 can quickly clamp and lock onto the outside of the torque screwdriver 11 to prevent it from continuing to spin freely, reduce the load on the detection screw 4, and play an overload protection role.

[0041] In one embodiment, the fixing component 8 includes a fixing sleeve 801, the fixing sleeve 801 having an inner sliding groove 802 inside, and the lifting component 9 extending into the inner sliding groove 802.

[0042] By providing an inner groove 802 inside the fixed sleeve plate 801, a displacement channel is provided for the lifting process of the lifting assembly 9, and its displacement path is restricted at the same time, thus restricting the displacement path of the torque screwdriver 11.

[0043] In one embodiment, the lifting assembly 9 includes a lifting screw 901, which is rotatably mounted on the inner wall of the fixed sleeve plate 801. A threaded block 902 is threadedly connected to the outer surface of the lifting screw 901. A horizontal plate 903 is fixedly mounted on one end of the threaded block 902, and the two sides of the threaded block 902 are slidably connected to the inner wall of the inner groove 802.

[0044] By rotating the lifting screw 901, the threaded block 902 can be driven to slide along the inner side of the inner groove 802, thereby causing the horizontal plate 903, the drive mechanism 10, and the torque screwdriver 11 to move together until the bottom detection end of the torque screwdriver 11 extends to the inner side of the detection screw 4, at which point the lifting screw 901 stops. This provides the torque screwdriver 11 with a spacing adjustment effect while restricting its vertical position to prevent it from shifting.

[0045] In one embodiment, the drive mechanism 10 includes a drive motor 1011, the output end of the drive motor 1011 is provided with a drive wheel 1012, one side of the drive wheel 1012 is engaged with a rotating wheel 1013, and the torque screwdriver 11 passes through and is threadedly connected to the inside of the rotating wheel 1013.

[0046] The drive motor 1011 is fixed on the horizontal plate 903. When the drive motor 1011 is started, it drives the drive wheel 1012 to rotate and drives the rotating wheel 1013 to rotate, thereby providing the driving force for the torque screwdriver 11 to rotate on its own, reducing the impact of unstable rotation speed and position deviation of the handle on the detection value.

[0047] In one embodiment, for the aforementioned detection screw 4, there are several groups of detection screw 4 and threaded discs 701, and the spacing between each pair of the several groups of detection screw 4 is equal.

[0048] By setting several sets of test screws 4 on the test plate 3, multiple test processes can be provided for the torque screwdriver 11 so as to accurately obtain the torque value of the torque screwdriver 11.

[0049] Through the above technical solution, 1. By supporting the drive mechanism 10 and the torque screwdriver 11 on the lifting assembly 9, the distance between the torque screwdriver 11 and the detection screw 4 can be adjusted by the lifting assembly 9. Furthermore, by locking the external thread of the torque screwdriver 11 to the inner side of the drive mechanism 10, the drive mechanism 10 can drive the torque screwdriver 11 to rotate independently, ensuring that the vertical position of the torque screwdriver 11 remains consistent, preventing positional deviations or speed changes from affecting the accuracy of torque value detection. Simultaneously, the limiting assembly 7 and the telescopic clamping mechanism 6 can quickly limit the torque screwdriver 11, providing overload protection for the detection screw 4 to prevent continued idling friction from damaging the inside of the detection screw 4; 2. The cross-shaped limiting baffles 702 surround the threaded disc 701. When the threaded disc 701 rotates, it continuously drives the limiting baffles 702. The rotation causes the adjacent limiting baffles 702 to continuously displace and restrict the tapered rod 604 until the threaded disc 701 stops rotating. After this, the restriction on the tapered rod 604 is released, and the extension and retraction of the spring 601 pushes the tapered rod 604 to extend into the gap between the limiting baffles 702. At the same time, since the clamping rod 603 is longer than the tapered rod 604, it can quickly clamp and lock onto the outside of the torque screwdriver 11 to prevent it from continuing to spin freely, reduce the load on the detection screw 4, and provide overload protection. The drive motor 1011 is fixed on the horizontal plate 903. When the drive motor 1011 is started, it drives the drive wheel 1012 to rotate and drives the rotating wheel 1013 to rotate, thereby providing the driving force for the torque screwdriver 11 to rotate on its own, reducing the impact of unstable rotation speed and position deviation caused by hand-held rotation on the detection value.

[0050] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A torque screwdriver tester with an overload protection mechanism, comprising a tester body (1), characterized in that: The outer surface of the calibration instrument body (1) is provided with a detection platform (2), a detection plate (3) is slidably mounted on the top of the detection platform (2), and a detection screw (4) is arranged on the inner wall of the detection plate (3). A support assembly (5) is fixedly mounted on the top of the detection platform (2), and a telescopic clamping mechanism (6) is fixedly mounted on one side of the support assembly (5). The outer surface of the detection screw (4) is threadedly connected to a limit assembly (7). The outer surface of the calibration instrument body (1) is provided with a fixing assembly (8), and a lifting assembly (9) is arranged inside the fixing assembly (8). A driving mechanism (10) is arranged on the top of the lifting assembly (9), and a torque screwdriver (11) is threadedly connected to the inner wall of the driving mechanism (10).

2. A torque screwdriver tester with an overload protection mechanism according to claim 1, characterized in that: The top of the detection platform (2) is provided with a slide groove (12), the interior of the detection platform (2) is provided with an inner through groove (13), and the bottom of the detection plate (3) is provided with a slide plate (14), and the slide plate (14) is slidably connected to the interior of the slide groove (12).

3. A torque screwdriver tester with an overload protection mechanism according to claim 1, characterized in that: The support assembly (5) comprises a bottom plate (501), and a support plate (502) is fixedly mounted on the top of the bottom plate (501); The telescopic clamping mechanism (6) comprises a spring (601), one end of the spring (601) is fixedly mounted with a connecting plate (602), and the outer surface of the connecting plate (602) is respectively fixedly mounted with a clamping rod (603) and a conical rod (604).

4. A torque screwdriver tester with an overload protection mechanism according to claim 1, characterized in that: The limiting assembly (7) comprises a threaded disc (701), and a limiting stopper (702) is arranged on the outer surface of the threaded disc (701). The limiting stopper (702) is distributed in a cross shape outside the threaded disc (701).

5. A torque screwdriver tester with an overload protection mechanism according to claim 1, characterized in that: The fixing assembly (8) comprises a fixing sleeve (801), an inner slide groove (802) is provided inside the fixing sleeve (801), and the lifting assembly (9) extends into the inner slide groove (802).

6. A torque screwdriver tester with an overload protection mechanism according to claim 5, characterized in that: The lifting assembly (9) comprises a lifting screw (901), wherein the lifting screw (901) is rotatably mounted on the inner wall of the fixed sleeve (801), the outer surface of the lifting screw (901) is threadedly connected to a thread block (902), one end of the thread block (902) is fixedly mounted with a cross plate (903), and both sides of the thread block (902) are slidably connected to the inner wall of the inner slide groove (802).

7. A torque screwdriver tester with an overload protection mechanism according to claim 5, characterized in that: The driving mechanism (10) comprises a driving motor (1011), the output end of the driving motor (1011) is provided with a driving wheel (1012), one side of the driving wheel (1012) is meshed with a rotating wheel (1013), and the torque screwdriver (11) penetrates through and is threadedly connected to the inside of the rotating wheel (1013).

8. A torque screwdriver tester with an overload protection mechanism according to claim 1, characterized in that: The number of the detection screws (4) and the threaded discs (701) is several groups, and the distances between any two of the detection screws (4) in the several groups are equal.

Images