A threaded protector pull-off test device

Abstract

The utility model discloses a kind of thread protector pull-off test device, it relates to mechanical mechanics performance test technical field, the thread protector pull-off test device, including pull rod, pull rod end portion rotation setting screw rod, screw rod side surface is symmetric and has clamping block with thread sleeve, in pull rod end portion and it is perpendicular rotation setting screw rod with sleeve, by screw rod thread installation symmetrically arranged clamping block, rotate screw rod control two sides clamping block and carry out clamping positioning to thread protector, two groups of clamping blocks driven by screw rod have greater activity interval, can adapt to from outside to inside clamping and from inside to outside resistance tight clamping, it is suitable for the fixed use of multiple models of thread protection sleeve, so that equipment use does not need to replace specified tooling for test product model, not only reduce equipment cost, also avoid dismounting tooling to need calibration, and there is greater test error and other problems.

Description

Technical Field

[0001] This utility model proposes a pull-out test device, which relates to the field of mechanical performance testing technology, and specifically to a pull-out test device for a thread protector. Background Technology

[0002] The thread protector pull-out test is used to evaluate the ability of a thread protector to resist pull-out from the substrate when subjected to axial tensile force, to determine the maximum tensile force it can withstand in actual use, and to ensure the safety and reliability of its fixation.

[0003] Testing typically uses a universal testing machine (such as the KZ-DSC-20 model) or an electronic universal testing machine, equipped with custom-made tooling fixtures to ensure that the samples are firmly fixed. The configuration of custom-made tooling fixtures is costly and specialized, which not only limits the scope of use of the equipment, but also increases data errors when using the tooling.

[0004] Therefore, those skilled in the art propose a thread protector pull-out test device, which is designed to be compatible not only with external and internal thread protectors, but also with universal tooling for protectors of different sizes, thereby reducing equipment costs and achieving a universal effect through tooling adjustment. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a thread protector pull-out test device. A clamping block, adjustable via a lead screw, is installed at the end of the pull rod to clamp and position the thread protector. The clamping block, which slides via the lead screw, has a larger adjustment range to accommodate materials of different sizes. It can clamp and position different thread protectors from the inside out or from the outside in, eliminating the need to change the corresponding fixture according to the protector specifications. This not only reduces testing costs but also reduces the hassle of changing to customized tooling and minimizes errors.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a thread protector pull-out test device, comprising a pull rod and a clamping block disposed at the advancing end of the pull rod, wherein the clamping block positions the thread protector and the pull rod applies a pulling force to it for testing.

[0007] The pull rod has a lead screw perpendicular to its infeed end, and two clamping blocks are symmetrically threaded onto the side of the lead screw about the pull rod. The threaded connection drives the clamping blocks symmetrically arranged on both sides to clamp and position the thread protector.

[0008] The two clamping blocks that slide along the lead screw have a larger adjustment range, which can be adapted to clamp and position the protector for different positioning needs.

[0009] Preferably, the clamping block includes a mounting cylinder, which is threaded onto the side of the lead screw. The mounting cylinder ensures stable driving of the lead screw onto the clamping block.

[0010] The mounting cylinder is hinged to a clip on its side, and a first spring is provided between the mounting cylinder and the clip. The clip can rotate according to the hinge point. The elastic force of the first spring provides a positioning and buffering effect for the protector, avoiding the problem of protectors with different opening shapes not being able to be clamped.

[0011] Preferably, the pull rod advance end is fixed with a sleeve perpendicularly thereto, the sleeve has a sliding groove on its side, the lead screw is inserted into the inner side of the sleeve, the lead screw is rotatably connected to the sleeve, and the clamping block extends to the outer side of the sleeve through the sliding groove and is slidably connected thereto.

[0012] Specifically, the lead screw and the sleeve are coaxially connected, and the two ends of the lead screw and the sleeve are rotatably connected, which facilitates the rotation of the lead screw to drive the clamping block symmetrically. In addition, the sliding groove on the side of the sleeve guides the clamping block and ensures that the clamping block is clamped along the sliding groove under the driving action of the lead screw.

[0013] Preferably, a turntable is fixed to the end of the lead screw, which facilitates the rotational drive of the lead screw.

[0014] The lead screw is slidably sleeved with a limiting block, and the end of the sleeve is fixed with a limiting tooth corresponding to the limiting block. After the clamping block clamps and positions the protector, the limiting block is slid close to the limiting tooth at the end of the sleeve to position the lead screw, so as to prevent the clamping block from loosening when the lead screw rotates during equipment use.

[0015] Preferably, a limiting strip is fixed on the side of the lead screw along the axial direction, and the limiting strip limits the rotation of the limiting block, so that the limiting block positions the rotation of the lead screw.

[0016] A second spring is provided on the side of the lead screw, on the side of the limiting block away from the sleeve, and the limiting block is positioned by the elastic force of the second spring against the end of the sleeve.

[0017] Preferably, a washer is slidably sleeved on the side of the lead screw, and one end of the second spring is fixedly connected to the washer. The washer causes the elastic force of the second spring to press against the limiting block, while the rotation of the limiting block to adapt to the limiting teeth will not affect the second spring.

[0018] The lead screw is threaded with an adjusting nut on its side. The end of the second spring away from the washer is set against the side wall of the adjusting nut. The adjusting nut is adjusted along the lead screw. The second spring presses against the washer, thereby causing the limiting block to press against the limiting teeth at the end of the sleeve to complete the limiting.

[0019] This utility model discloses a thread protector pull-out test device, which has the following beneficial effects:

[0020] This thread protector pull-out test device features a lead screw mounted perpendicularly to the end of the pull rod via a sleeve. Symmetrically arranged clamping blocks are installed via the lead screw thread. Rotating the lead screw controls the clamping blocks on both sides to clamp and position the thread protector. The two sets of clamping blocks driven by the lead screw have a larger range of motion, accommodating both outside-in and inside-out clamping. It is suitable for fixing various types of thread protectors, eliminating the need to change to specific tooling for the tested product model. This not only reduces equipment costs but also avoids the need for calibration during tooling disassembly and assembly, which can lead to larger test errors. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the overall structure of this utility model;

[0024] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0025] Figure 4 This is a schematic diagram of the lead screw tightening and limiting structure of this utility model.

[0026] In the diagram: 1. Pull rod; 2. Clamping block; 201. Mounting cylinder; 202. Clamp; 203. First spring; 3. Lead screw; 4. Sleeve; 5. Slide groove; 6. Turntable; 7. Limiting block; 8. Limiting tooth; 9. Limiting strip; 10. Second spring; 11. Washer; 12. Adjusting nut. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments of this utility model are described clearly and completely. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] This utility model discloses a thread protector pull-out test device;

[0029] According to the appendix Figure 1-4 As shown, it includes a pull rod 1 and a clamping block 2 set at the advancing end of the pull rod 1. After the clamping block 2 clamps and positions the thread protector, the pull rod 1 applies a pulling force to it to perform a tension anti-disengagement test along the installation direction of the thread protector.

[0030] A lead screw 3 is perpendicularly arranged at the input end of the pull rod 1. Two clamping blocks 2 are symmetrically threaded onto the side of the lead screw 3 about the pull rod 1. The threaded connection drives the symmetrically arranged clamping blocks 2 on both sides to clamp and position the thread protector. Rotating the lead screw 3 can drive the two symmetrically arranged clamping blocks 2 on both sides to move in opposite directions, controlling the clamping blocks 2 on both sides to position the thread protector.

[0031] The two clamping blocks 2 that slide along the lead screw 3 have a larger adjustment range, which can be used for both external clamping and internal abutment positioning of the thread protector.

[0032] The clamping block 2 includes a mounting sleeve 201, which is threaded onto the side of the lead screw 3. The mounting sleeve 201 ensures that the lead screw 3 can stably drive the clamping block 2, and the drive of the lead screw 3 to the clamping block 2 does not affect the positioning of the thread protector.

[0033] A clamp 202 is hinged to the side of the mounting cylinder 201. A first spring 203 is provided between the mounting cylinder 201 and the clamp 202. The hinged clamp 202 can rotate according to the hinge point. The elastic force of the first spring 203 provides a positioning buffer effect for the clamp 202 on the protector, avoiding the problem of protectors with different opening shapes not being able to be clamped. As the clamps 202 on both sides press against the side wall of the thread protector, the first spring 203 provides an elastic force on the clamp 202. This elastic force buffers the collision between the clamps 202 on both sides and the thread protector, and the elastic force continuously applies force to the clamp 202 to press against the thread protector for positioning.

[0034] A sleeve 4 is fixed perpendicularly to the advancing end of the pull rod 1. A groove 5 is provided on the side of the sleeve 4. The lead screw 3 is inserted into the inner side of the sleeve 4 and is rotatably connected to the sleeve 4. The clamping block 2 extends to the outside of the sleeve through the groove 5 and is slidably connected to it.

[0035] Specifically, the lead screw 3 and the sleeve 4 are coaxially connected, and the two ends of the lead screw 3 and the sleeve 4 are rotatably connected, which facilitates the rotation of the lead screw 3 to drive the clamping block 2 symmetrically. In addition, the sliding groove 5 opened on the side of the sleeve 4 guides the clamping block 2, ensuring that the clamping block 2 is clamped along the sliding groove 5 under the driving action of the lead screw 3.

[0036] A turntable 6 is fixed to the end of the lead screw 3. The turntable 6 facilitates the rotation of the lead screw 3. The rotation angle of the turntable 6 also makes it easy to check whether there is any positioning looseness.

[0037] The lead screw 3 is slidably sleeved with a limiting block 7, and the end of the sleeve 4 is fixed with a limiting tooth 8 corresponding to the limiting block 7. After the clamping block 2 clamps and positions the thread protector, the sliding limiting block 7 is close to the limiting tooth 8 at the end of the sleeve 4 to position the lead screw 3, so as to prevent the clamping block 2 from loosening when the lead screw 3 rotates during equipment use.

[0038] A limiting strip 9 is fixed on the side of the lead screw 3 along the axial direction. The limiting strip 9 limits the rotation of the limiting block 7, so that the limiting block 7 positions the rotation of the lead screw 3.

[0039] A second spring 10 is provided on the side of the lead screw 3 and on the side of the limiting block 7 away from the sleeve 4. The limiting block 7 is positioned by the elastic force of the second spring 10 against the end of the sleeve 4.

[0040] A washer 11 is slidably sleeved on the side of the lead screw 3. One end of the second spring 10 is fixedly connected to the washer 11. The washer 11 causes the elastic force of the second spring 10 to press against the limiting block 7, and at the same time, the second spring 10 will not be affected by the rotation of the limiting block 7 to adapt to the limiting tooth 8.

[0041] The lead screw 3 is threaded with an adjusting nut 12. The end of the second spring 10 away from the washer 11 is set against the side wall of the adjusting nut 12. The adjusting nut 12 is adjusted along the lead screw 3. The second spring 10 presses against the washer 11, thereby causing the limiting block 7 to press against the limiting tooth 8 at the end of the sleeve 4 to complete the limiting.

[0042] A lead screw 3 is set at the end of the pull rod 1 and rotates perpendicularly to it via a sleeve 4. Symmetrically arranged clamping blocks 2 are threaded onto the lead screw 3. Rotating the lead screw 3 controls the clamping blocks 2 on both sides to clamp and position the thread protector. The two sets of clamping blocks 2 driven by the lead screw 3 have a larger range of motion, which can adapt to clamping from the outside to the inside and clamping from the inside to the outside. It is suitable for fixing various types of thread protectors, so that the equipment does not need to change the specified tooling for the test product model. This not only reduces the equipment cost, but also avoids the need for calibration when disassembling and assembling tooling, and avoids the problem of larger test errors.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A thread protector pull-out test device, comprising a pull rod (1) and a clamp (2) disposed at the advancing end of the pull rod (1), wherein the clamp (2) positions the thread protector, and the pull rod (1) applies a tensile force to it for testing, characterized in that: The pull rod (1) has a lead screw (3) perpendicular to its input end. The two clamping blocks (2) are symmetrically threaded onto the side of the lead screw (3) about the pull rod (1). The clamping blocks (2) symmetrically arranged on both sides are driven to clamp and position the thread protector through the threaded connection.

2. The thread protector pull-out test device as described in claim 1, characterized in that: The clamping block (2) includes a mounting cylinder (201), which is threaded onto the side of the lead screw (3). A clamp (202) is hinged to the side of the mounting cylinder (201), and a first spring (203) is provided between the mounting cylinder (201) and the clamp (202).

3. The thread protector pull-out test device as described in claim 1, characterized in that: The pull rod (1) has a sleeve (4) fixed perpendicularly to its advancing end. The sleeve (4) has a sliding groove (5) on its side. The lead screw (3) is inserted into the inner side of the sleeve (4). The lead screw (3) is rotatably connected to the sleeve (4). The clamping block (2) extends to its outer side through the sliding groove (5) and is slidably connected to it.

4. The thread protector pull-out test device as described in claim 3, characterized in that: The end of the lead screw (3) is fixed with a turntable (6), the side of the lead screw (3) is slidably sleeved with a limit block (7), and the end of the sleeve (4) is fixed with a limit tooth (8) corresponding to the limit block (7).

5. The thread protector pull-out test device as described in claim 4, characterized in that: A limit strip (9) is fixed on the side of the lead screw (3) along the axial direction, and a second spring (10) is provided on the side of the lead screw (3) and on the side of the limit block (7) away from the sleeve (4).

6. The thread protector pull-out test device as described in claim 5, characterized in that: A washer (11) is slidably sleeved on the side of the lead screw (3), and one end of the second spring (10) is fixedly connected to the washer (11). An adjusting nut (12) is threadedly sleeved on the side of the lead screw (3), and the end of the second spring (10) away from the washer (11) is set to abut against the side wall of the adjusting nut (12).

Images