Screw joint pull-off clamp suitable for shear performance test
By designing a pull-out clamp for threaded joints and using a bidirectional screw-driven expansion clamp to hold the joint from the inside, the problem of unstable clamping of threaded joints in existing technologies is solved, ensuring the accuracy and reliability of shear performance testing.
Patent Information
- Application Number
- CN202520420043.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing screw joint pull-out clamps cannot hold screw joints from the inside, which increases the difficulty of shear performance testing.
A screw-in connector pull-out clamp was designed, which uses two sets of clamps symmetrically distributed on the left and right. The bidirectional screw driven by the positive and negative motors drives the expansion clamp to firmly clamp the connector from the inside, ensuring that the connector does not shift or fall off during the shear performance test.
Stable clamping of the joint was achieved during shear performance testing, ensuring accurate application of shear force and avoiding test errors.
Smart Images
Figure CN223637239U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw joint test technical field, concretely is a kind of screw joint pull-off clamp suitable for shearing property test. BACKGROUND
[0002] Shearing property test is a kind of test method for evaluating the shear deformation and failure resistance of material under shear stress, and pull-off clamp is used in the shearing property test of screw joint, mainly to stabilize the clamping of screw joint and accurately transmit shear force, to ensure the accuracy and reliability of test results.
[0003] The existing screw joint pull-off clamp mostly clamps one end of screw joint from outside, so that the clamping surface cannot be processed and tested, increasing the difficulty of shearing property test.
[0004] Therefore, it is particularly important to design a screw joint pull-off clamp suitable for shearing property test to change the above technical defects and improve overall practicability. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of screw joint pull-off clamp suitable for shearing property test to solve the problems raised in the above background.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] A kind of screw joint pull-off clamp suitable for shearing property test, including joint main body and two groups of left and right symmetrical distribution's clamping seat, the side wall of the clamping seat is fixed with end part card station, the top of the clamping seat is provided with internal thread seat, the internal thread of the internal thread seat is connected with abutment screw rod, one end of the end part card station is equipped with clamping shell, the inboard of the clamping shell is provided with fixed cross bar, one end of the fixed cross bar is equipped with positive and negative motor, the output of the positive and negative motor is connected with bidirectional screw rod and is connected with the inside of fixed cross bar, the outside of the bidirectional screw rod is symmetrically screwed and is connected with screw rod sliding sleeve, the outside of the screw rod sliding sleeve is fixed with expansion clamp.
[0008] As the preferred scheme of the utility model, the bottom end of the abutment screw rod is wrapped with rubber sleeve, and the top of the abutment screw rod is connected with operating cap.
[0009] As the preferred scheme of the utility model, the inside of the clamping seat is installed with controller, wherein the controller is connected with positive and negative motor through wire, and the connection mode is electrically connected.
[0010] As the preferred scheme of the utility model, the two ends of the bidirectional screw rod are rotatably connected in the inside of fixed cross bar through bearing seat.
[0011] As the preferred scheme of the utility model, the bidirectional screw rod is spliced by two groups of screw rods with opposite threads.
[0012] As the preferred scheme of the utility model, the two groups of expansion clamps are inserted in the inside of the joint main body.
[0013] Compared with the prior art, the utility model has the beneficial effects that:
[0014] In the utility model, the screw joint pull-off clamp suitable for shear performance test is arranged, the clamp holder is installed on the jaw arm of the shear performance test equipment, then the two ends of the joint main body are respectively inserted in the outside of the expansion clamp, at this time, the forward and reverse motor drives the bidirectional screw rod to rotate, the two groups of bidirectional screw rods with opposite threads drive the two groups of screw rod sleeves to move reversely until the two groups of expansion clamps completely support the joint main body from the inside, then the abutting screw rod is rotated in the internal thread seat, repositioning is carried out, the overall structure ensures that the screw joint is firmly gripped, prevents the joint from being displaced or falling off in the test process, ensures the accurate application of the shear force in the test process, and avoids the test error caused by the movement of the joint. BRIEF DESCRIPTION OF DRAWINGS
[0015] Fig. 1 It is the overall structure perspective view of the utility model;
[0016] Fig. 2 It is the partial structure schematic view of the utility model;
[0017] Fig. 3 It is the enlarged schematic view of the A structure of the utility model.
[0018] In the drawing: 1, joint main body; 2, clamp holder; 3, end clamping table; 4, internal thread seat; 401, abutting screw rod; 5, clamping shell; 501, fixed cross rod; 502, forward and reverse motor; 503, bidirectional screw rod; 504, screw rod sleeve; 505, expansion clamp. DETAILED DESCRIPTION
[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model, obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments, based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0020] For the convenience of understanding the utility model, the utility model will be described more fully below with reference to the relevant drawings, several embodiments of the utility model are given, however, the utility model can be realized in many different forms, and is not limited to the embodiments described herein, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.
[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be intervening elements, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be intervening elements, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, the terminology used in the specification of the utility model herein is only for the purpose of describing specific embodiments and is not intended to limit the utility model, the term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0023] Embodiment, please refer to Figs. 1-3 The utility model provides a technical scheme:
[0024] A screw joint pull-off clamp suitable for shearing performance test, including joint main body 1 and two groups of left and right symmetrical distribution's clamping seat 2, the side wall of clamping seat 2 is fixed with end part card station 3, the top of clamping seat 2 is provided with internal thread seat 4, and the internal thread of internal thread seat 4 is connected with abutment screw rod 401, and one end of end part card station 3 is installed with clamping shell 5;
[0025] Wherein the bottom end of abutment screw rod 401 is wrapped with rubber sleeve, and the top of abutment screw rod 401 is connected with operating cap.
[0026] In this embodiment, please refer to Fig. 3 The inner side of clamping shell 5 is provided with fixed cross bar 501, one end of fixed cross bar 501 is installed with positive and negative motor 502, the output end of positive and negative motor 502 penetrates the inside of fixed cross bar 501 and is connected with bidirectional screw rod 503, the outer side of bidirectional screw rod 503 is symmetrically screwed with screw rod sliding sleeve 504, and the outer side of screw rod sliding sleeve 504 is fixed with expansion clamp 505;
[0027] The inside of the clamp holder 2 is mounted with a controller, the controller is connected with the reversible motor 502 through wires, and the connection mode is electrical connection. Both ends of the bidirectional screw rod 503 are rotatably connected in the inside of the fixed cross bar 501 through bearing seats. The bidirectional screw rod 503 is formed by splicing two groups of screw rods with opposite threads. The two groups of expansion clamps 505 are inserted in the inside of the joint body 1.
[0028] The working process of the utility model is as follows: the clamp holder 2 is installed on the jaw arm of the shearing performance test equipment, then the two ends of the joint body 1 are inserted outside the expansion clamps 505, at this time, the reversible motor 502 drives the bidirectional screw rod 503 to rotate, the two groups of bidirectional screw rods 503 with opposite threads drive the two groups of screw rod sliding sleeves 504 to move reversely until the two groups of expansion clamps 505 completely support the joint 1 body from the inside, then the abutting screw rod is rotated in the internal thread seat 4, repositioning is carried out, the overall structure ensures that the screwed joint is firmly gripped, prevents the joint from being displaced or falling off in the test process, ensures the accurate application of shearing force in the test process, and avoids the test error caused by the movement of the joint.
[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A pull-out clamp for a threaded joint suitable for shear performance testing, comprising a joint body (1) and two sets of clamps (2) symmetrically distributed on the left and right sides, characterized in that: The side wall of the clamp (2) is fixed with an end plate (3), and the top of the clamp (2) is provided with an internal thread seat (4). The internal thread seat (4) is connected to an abutment screw (401) by an internal thread. One end of the end plate (3) is equipped with a clamping shell (5). The inner side of the clamping shell (5) is provided with a fixed crossbar (501). One end of the fixed crossbar (501) is equipped with a forward and reverse motor (502). The output end of the forward and reverse motor (502) passes through the interior of the fixed crossbar (501) and is connected to a bidirectional lead screw (503). The outer side of the bidirectional lead screw (503) is symmetrically threaded with a lead screw sleeve (504). An expansion clamp (505) is fixed on the outer side of the lead screw sleeve (504).
2. A pull-out fixture for a threaded joint suitable for shear performance testing according to claim 1, characterized in that: The bottom end of the abutting screw (401) is covered with a rubber sleeve, and the top of the abutting screw (401) is connected with an operating cap.
3. A pull-out fixture for a threaded joint suitable for shear performance testing according to claim 1, characterized in that: The clamp (2) is equipped with a controller, which is connected to the forward and reverse motor (502) by a wire and the connection is electrical.
4. A pull-out fixture for a threaded joint suitable for shear performance testing according to claim 1, characterized in that: Both ends of the bidirectional lead screw (503) are rotatably connected to the inside of the fixed crossbar (501) via bearing seats.
5. A pull-out fixture for a threaded joint suitable for shear performance testing according to claim 1, characterized in that: The bidirectional lead screw (503) is made by splicing two sets of screws with opposite threads.
6. A pull-out fixture for a threaded joint suitable for shear performance testing according to claim 1, characterized in that: The two sets of expansion clips (505) are inserted inside the connector body (1).