A tensile testing device for rapid positioning of screws and bolts.

Abstract

This invention relates to the field of bolt tensile testing technology, specifically to a rapid positioning tensile testing device for screws and bolts. The device includes a body with a tension arm slidably connected inside. A positioning device is located at the bottom of the tension arm, comprising: a top positioning bracket with a pressure plate elastically connected inside via a spring; a motor housing with a bidirectional threaded rotating rod rotatably inside, and a movable screw seat threaded to the surface of the bidirectional threaded rotating rod; and a limiting plate with a positioning clamp fixed to its end via a sliding rod. This invention achieves rapid positioning of the bolt through the positioning bracket, stable clamping by the elastic pressure plate, and the movement of the positioning clamp at the sliding rod on the limiting plate via the movable screw seat on the bidirectional threaded rotating rod, thus achieving stable positioning of the bolt during tensile testing and ensuring positioning stability while rapidly positioning and disassembling.

Description

Technical Field

[0001] This invention relates to the field of bolt tensile testing technology, specifically to a fast-positioning tensile testing device for screw and bolt inspection. Background Technology

[0002] Bolts are cylindrical threaded fasteners that use nuts. They consist of a head and a threaded shank and require a nut to fasten two parts with through holes. This type of connection is called a bolted connection. Bolts are indispensable in daily life and industrial manufacturing. After production, bolts need to be tested to ensure they are up to standard. There are many types of tests, such as tensile testing. Tensile testing equipment needs to be positioned during testing to prevent movement.

[0003] By connecting bolts with nuts and bolts, and using a clamp to pull the nuts and bolts together, a pressure sensor detects the range of tension and checks whether the tension on the bolt meets the experimental standards. During the tensile test of the thread, the bolt needs to be positioned. Existing positioning methods do not have the function of quickly positioning bolts of different sizes, and it is difficult to ensure the stability of the bolt after positioning. In view of this, we propose a tensile testing device for screws and bolts with rapid positioning. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a rapid positioning tensile testing device for screw and bolt inspection, solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a tensile testing device for rapid positioning of screws and bolts, comprising a body, wherein a tension arm is slidably connected inside the body, and a positioning device is provided at the bottom of the tension arm, the positioning device comprising:

[0006] A top positioning bracket is fixedly connected to the bottom of the tension arm at its top, and a pressure plate is elastically connected inside the top positioning bracket via a spring.

[0007] The motor housing has a surface that is fixedly connected to the surface of the top positioning bracket by bolts. The motor housing has a bidirectional threaded rotating rod rotatably connected inside, and a movable screw seat is threadedly connected to the surface of the bidirectional threaded rotating rod.

[0008] A limiting plate is provided, one end of which is elastically connected to the interior of a movable screw seat via a spring, and the other end of which is fixedly connected to a sliding rod, with a positioning clamp fixedly connected to the end of the sliding rod.

[0009] Preferably, a control button is fixedly connected inside the movable screw seat by bolts, and a rubber block is fixedly connected to the side of the limiting plate near the control button.

[0010] Preferably, the surface of the pressure plate is slidably connected to the inner wall of the top positioning bracket, and the top positioning bracket has a slot inside.

[0011] Preferably, the surface of the bidirectional threaded rod is rotatably connected to the interior of the top positioning bracket, and the surface of the movable screw seat is slidably connected to the inner wall of the top positioning bracket.

[0012] Preferably, the surfaces of the limiting plate and the slide rod are slidably connected to the interior of the movable screw seat, and a motor is installed inside the motor housing.

[0013] Preferably, the surface of the machine body is fixedly connected to a bottom positioning bracket by bolts, and the surface of the machine body is provided with buttons.

[0014] As can be seen from the above technical solutions, the tensile testing device for rapid positioning of screws and bolts provided in the embodiments of this specification has at least the following beneficial effects:

[0015] (1) The present invention uses the slot in the positioning card seat to quickly position the bolt nut or nut, and the elastic pressure plate stably clamps the top and bottom of it respectively. The moving screw seat on the bidirectional threaded rotating rod is moved by the motor. The moving screw seat moves and clamps the positioning clamp on the sliding rod through the limiting plate, so as to achieve the effect of stable positioning of the screw in the tensile test. While quickly positioning and disassembling, the stability of the positioning in the experiment is guaranteed.

[0016] (2) The present invention promotes the movement of the upper positioning plate of the slide rod by the force of the subsequent movement of the positioning clamp, and uses the rubber block to press the control button in the moving screw seat to achieve the effect of timely shutting off the motor, thereby avoiding the problem of over-clamping, improving the clamping stability, and facilitating the safe positioning of objects of different sizes. Attached Figure Description

[0017] The accompanying drawings, which are provided to further illustrate the invention, constitute a part of this application:

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the top positioning card holder in this invention;

[0020] Figure 3 This is a schematic diagram of the positioning device structure in this invention;

[0021] Figure 4This is a schematic diagram of the internal structure of the movable screw seat in this invention.

[0022] In the diagram: 1. Machine body; 2. Pulling arm; 3. Positioning device; 31. Top positioning bracket; 32. Pressure plate; 33. Motor box; 34. Two-way threaded rotating rod; 35. Moving screw seat; 36. Limiting plate; 37. Slide rod; 38. Positioning clamp; 39. Control button; 310. Rubber block; 311. Slot; 4. Bottom positioning bracket. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention 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 the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Please see Figures 1-4 As shown, the technical solution provided by this invention is as follows:

[0025] A tensile testing device for rapid positioning of screws and bolts includes a body 1, with a tension arm 2 slidably connected inside the body 1. The tension arm 2 is driven by an existing structure within the body 1 to perform up-and-down tensile tests. A positioning device 3 is installed at the bottom of the tension arm 2, which is used to quickly position the bolt, nut, or bolt. The positioning device 3 includes:

[0026] The top positioning bracket 31 is fixedly connected to the bottom of the tension arm 2. The top positioning bracket 31 is elastically connected to the pressure plate 32 through a spring. The elastically fixed pressure plate 32 is located at the top inside the top positioning bracket 31 and is used to elastically clamp and fix the top of the bolt nut or nut. While elastically positioning, it can also position bolt nuts or nuts of different thicknesses. In addition, during the elastic clamping and positioning, it will not affect the tensile test of the bolt nut or nut. Because in the tensile test, the bolt nut or nut is in an upward pulling state in the top positioning bracket 31, and the tension it receives will act on the lower part of the pressure plate 32, improving the stability of the bolt positioning in the tensile test.

[0027] The motor housing 33 has a surface that is fixedly connected to the surface of the top positioning bracket 31 by bolts. The motor housing 33 has a rotatable bidirectional threaded rod 34 inside. The surface of the bidirectional threaded rod 34 is threadedly connected to a movable screw seat 35. The motor housing 33 has a motor installed inside. The output shaft of the motor is engaged with the bidirectional threaded rod 34 and drives it to rotate. The bidirectional threaded rod 34 is located behind the pressure plate 32 and does not affect the clamping of the bolts during rotation.

[0028] The limiting plate 36 has one end connected to the interior of the movable screw seat 35 via a spring, and the other end of the limiting plate 36 is fixedly connected to a slide rod 37. The end of the slide rod 37 is fixedly connected to a positioning clamping plate 38. The bidirectional threaded rotating rod 34 rotates to control the relative movement of the limiting plates 36 on the two movable screw seats 35. The relative movement of the limiting plates 36 achieves the effect of positioning and clamping the bolt nut or nut, thereby improving the stability of clamping. The existing bolt nut or nut is polygonal in shape, which facilitates clamping and positioning.

[0029] In this embodiment, a control button 39 is fixedly connected to the inside of the movable screw seat 35 by bolts. The control button 39 is used to control the motor in the motor box 33 to shut down. Different sizes of bolts and nuts have different diameters and require different clamping distances. To avoid damage caused by excessive clamping, a limit plate 36 with one end elastically limits the movement. When the limit plate 36 clamps the bolt, it continues to move. The force of the movement promotes the slide rod 37 to move the limit plate 36, and the rubber block 310 presses the control button 39 inside the movable screw seat 35 to achieve the effect of shutting down the motor in time. This avoids the problem of excessive clamping, improves clamping stability, and facilitates safe positioning of objects of different sizes. A rubber block 310 is fixedly connected to the side of the limit plate 36 near the control button 39.

[0030] Furthermore, the surface of the pressure plate 32 is slidably connected to the inner wall of the top positioning bracket 31. The top positioning bracket 31 has a slot 311 inside, which is used to initially position the bolt, nut, or screw, facilitating quick positioning and quick disassembly. The surface of the bidirectional threaded rotating rod 34 is rotatably connected to the inside of the top positioning bracket 31. The surface of the movable screw seat 35 is slidably connected to the inner wall of the top positioning bracket 31, which is used to slide and limit the movable screw seat 35, so that it can only move in a straight line. The surfaces of the limiting plate 36 and the sliding rod 37 are both slidably connected to the inside of the movable screw seat 35. The surface of the machine body 1 is fixedly connected to the bottom positioning bracket 4 by bolts. The surface of the machine body 1 is provided with a button, which can control the motor in the motor box 33 to start, thereby controlling the positioning clamp 38 to move and clamp.

[0031] In use, the bolt and nut testing device of the present invention, which provides rapid positioning for bolt and nut testing, involves placing the bolt and nut into upper and lower positioning holders. The internal slots 311 provide initial rapid positioning. When the bolt and nut are inserted, the elastic pressure plates 32 in the two holders clamp and position the top and bottom of the bolt and nut respectively, improving clamping stability. A button controls the operation of the motor in the motor housing 33. The motor drives two threaded and linearly limited movable bolt seats 35 via a bidirectional threaded rotating rod 34. The movable bolt seats 35, through an internally elastically connected limiting plate 36, move and clamp the positioning clamping plate 38 on the sliding rod 37. When the positioning clamping plate 38 contacts the bolt surface, the continued movement force drives the rubber block 310 to press the control button 39 within the movable bolt seat 35, effectively shutting off the motor and avoiding over-clamping. This improves the stability of rapid positioning and clamping while facilitating safe positioning of objects of different sizes.

[0032] The above embodiments are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the embodiments of the present invention, and the patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A tensile testing device for rapid positioning of screws and bolts, comprising a body (1), characterized in that: The body (1) is internally slidably connected to a tension arm (2), and a positioning device (3) is provided at the bottom of the tension arm (2). The positioning device (3) includes: The top positioning bracket (31) is fixedly connected to the bottom of the tension arm (2) at the top, and the pressure plate (32) is elastically connected inside the top positioning bracket (31) by a spring. The motor housing (33) has a surface fixedly connected to the surface of the top positioning bracket (31) by bolts. The motor housing (33) has a bidirectional threaded rotating rod (34) rotatably connected inside. The surface of the bidirectional threaded rotating rod (34) is threadedly connected to a movable screw seat (35). A limiting plate (36) is provided. One end of the limiting plate (36) is elastically connected to the interior of the movable screw seat (35) via a spring. The other end of the limiting plate (36) is fixedly connected to a slide rod (37). The end of the slide rod (37) is fixedly connected to a positioning clamp (38). The movable screw seat (35) is fixedly connected to the control button (39) by bolts, and the side of the limiting plate (36) near the control button (39) is fixedly connected to the rubber block (310). The surface of the pressure plate (32) is slidably connected to the inner wall of the top positioning bracket (31), and the top positioning bracket (31) has a slot (311) inside.

2. The tensile testing device for rapid positioning of screws and bolts according to claim 1, characterized in that: The surface of the bidirectional threaded rotating rod (34) is rotatably connected to the interior of the top positioning bracket (31), and the surface of the movable screw seat (35) is slidably connected to the inner wall of the top positioning bracket (31).

3. The tensile testing device for rapid positioning of screws and bolts according to claim 1, characterized in that: The surfaces of the limiting plate (36) and the slide rod (37) are slidably connected to the interior of the movable screw seat (35), and the motor is installed inside the motor box (33).

4. The tensile testing device for rapid positioning of screws and bolts according to claim 1, characterized in that: The surface of the body (1) is fixedly connected to a bottom positioning bracket (4) by bolts, and buttons are provided on the surface of the body (1).

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