CN201757724U - Movable optical-direction loading device - Google Patents

Abstract

A movable loading device in any direction is composed of an arc-shaped guide rail, an outer slider and an inner slider. The dovetail groove below the arc-shaped guide rail can make it slide left and right, and the inner groove of the arc-shaped guide rail has pinholes. The four compression spring pins on the inner slider can jump and slide in the pin holes in the inner groove of the arc-shaped guide rail. The outer slider can not only slide on the arc-shaped guide rail, but also slide relative to the inner slider by fine-tuning the screw rod, so as to ensure that the outer slider can be accurately positioned at any orientation between -90° and +90°. Turbine wheel, worm rod, force sensor etc. are then fixed on the outer slide block. The device can load the specimen, and the direction of the load can be adjusted between -90° and +90°. At the same time, the load point can move left and right along the horizontal direction, and the load can be either compression or tension. The loading device can be used to add loads in different directions to the specimen. It has beautiful and simple structure, convenient operation and stable performance, can accurately determine the position and direction of the load, and has wide practicability.

Description

Movable loading device in any direction

technical field

The utility model relates to a loading device, in particular to a movable arbitrary-direction loading device suitable for experiments such as plane bending, oblique bending, and bending-twisting combination of beams.

Background technique

In the experiment of material mechanics, it is necessary to do the bending experiment of the cantilever beam. The existing loading device only has the one-way loading experimental device, and the loading direction of the device is unchanged. This type of loading device can generally only be used for plane bending experiments. For beams, there are mainly combined deformation forms such as oblique bending and bending torsion. The key to these experiments is to require that the load can change its orientation arbitrarily in a plane perpendicular to the beam. At present, there is no experimental device for bidirectional loading. To do a bidirectional loading experiment, two sets of loading devices must be installed to cooperate with each other. The structure is complex, the operation is inconvenient, and the loading is inaccurate.

Contents of the invention

Technical problem: The purpose of this utility model is to solve the problems existing in the prior art and provide a movable loading device in any direction with simple structure, convenient operation, stable loading and high precision.

Technical solution: The movable loading device in any direction of the utility model includes a base. One side of the base is provided with a horizontal and angular displacement loading device, and the other side is provided with a fixing seat for fixing the tested cantilever beam. The end is provided with a contact position adjustment device, and the middle part of the tested cantilever beam is provided with a strain gauge connected with a strain gauge; the horizontal and angular displacement loading device includes a dovetail groove slideway fixed on the base, and a dovetail groove The semi-arc-shaped guide rail matched with the slideway has an arc-shaped chute on the arc surface of the semi-arc-shaped guide rail. There is a worm gear loaded by hand, the outer slider is equipped with an inner slider with a strip hole in the middle for fine adjustment of its position, a force sensor is installed on the worm gear, and a force pressure head is installed on the force sensor ; The contact position adjustment device includes a dovetail groove slideway clamping block, a slider matched with the dovetail groove slideway clamping block, and a spherical contact is fixed on the slider.

The side of the arc-shaped guide rail is provided with an angle scale of -90°～+90° along the circumference, and the lower part of the side is provided with a horizontal displacement scale; the inner slider is provided with four spring pins inside. Hollow cylinder, the arc-shaped chute is provided with pinholes for easy positioning of the inner slider; the upper end surface of the dovetail groove slideway clamp block is provided with a horizontal scale for easy positioning of the spherical contact; the side of the arc-shaped guide rail There is a stop screw to limit its horizontal displacement.

Beneficial effects: the utility model can be used for experiments such as plane bending, oblique bending, and combination of bending and torsion of cantilever beams, and can also test the bending center position of open thin-walled cross-section beams. Pressure or tension can be applied to the tested beam between -90° and +90°. The device can not only be used in the teaching experiment of material mechanics, but also can be applied to the machinery that needs to be loaded in different directions in engineering practice. Such as this device can be used in drilling machine, is provided with motor and drill bit on the outer slide block, and drilling machine can drill the hole of arbitrary orientation, does not need to rotate workpiece when drilling.

Description of drawings

Accompanying drawing is the structural representation of the utility model.

In the figure: 1-arc guide rail; 2-outer slider; 3-inner slider; 4-dovetail slide; 5-stop screw; 6-arc chute; 7-pin hole; 8- Turbine worm; 9-fixed seat; 10-cantilever beam under test; 11-base; 12-angle scale; 13-force sensor; 14-force pressure head; 15-horizontal displacement scale; 16-ball contact; 17 - Dovetail slideway clamping block.

Detailed ways

Embodiments of the utility model will be further described below in conjunction with the accompanying drawings:

The movable loading device in any direction of the utility model is mainly composed of a base 11, a horizontal and angular displacement loading device arranged on the base 11, and a fixed seat 9 of the cantilever beam 10 to be tested. The horizontal and angular displacement loading device is arranged on one side of the base 11, and the fixed base 9 for fixing the tested cantilever beam 10 is arranged on the other side of the base 11. The middle part of the tested cantilever beam 10 is provided with a Strain gauges, the end of the tested cantilever beam 10 is provided with a contact position adjustment device, the contact position adjustment device includes a dovetail groove slideway clamp block 17, a slide block matched with the dovetail groove slideway clamp block 17, the slide A spherical contact 16 is fixed on the block, and the upper end surface of the dovetail slideway clamp block 17 is provided with a scale that facilitates the positioning of the spherical contact 16. Described horizontal and angular displacement loading device comprises the dovetail groove slideway 4 that is fixed on the base 11, and the arc-shaped guide rail 1 that cooperates with the dovetail groove slideway 4 can make The arc-shaped guide rail 1 slides left and right along the horizontal direction. A stop screw 5 that limits its horizontal displacement is provided on the side of the arc-shaped guide rail 1 . Before loading, the arc-shaped guide rail 1 is fixed on the dovetail groove slideway 4 by stop screws 5, and the outer slider 2 is fixed on the arc-shaped guide rail 1 by stop screws. The arc surface of the arc-shaped guide rail 1 is provided with an arc-shaped chute 6, and the arc-shaped chute 6 is provided with an outer slider 2 which can be displaced along the chute. Two cylinders are housed on the outer slider 2, and these two cylinders can make the outer slider 2 slide on the arc-shaped chute 6. The arc-shaped chute 6 is provided with pinholes 7 for easy positioning of the inner slider 3; the outer slider 2 is provided with a turbine worm rod 8 loaded by hand, and the outer slider 2 is provided with a pinhole for fine adjustment of its position. The middle part has the inner slide block 3 of strip hole, is provided with four hollow cylinders on the inner slide block 3, and spring pins are housed in the hollow cylinders, and four pins just in time all are pressed in the pin holes 7. Four hollow cylinders can ensure that the inner slider 3 slides along the arc-shaped chute 6, and four marbles can ensure that the inner slider 3 is "self-locked" on the arc-shaped chute 6, so as to prevent the inner slider 3 from being under the action of its own weight fall down. Turbine worm rod 8 is provided with force sensor 13, and force sensor 13 is provided with pressure head 14; There are 15 horizontal displacement scales. By rotating the fine-tuning screw, the outer slider 2 can slide relative to the inner slider 3, thereby ensuring that the outer slider 2 can be accurately positioned at any orientation between -90° and +90°.

Working process: fix the tested cantilever beam 10 on the fixed seat 9, connect the strain gauge in the middle of the tested cantilever beam 10 with the strain gauge through the wire, connect the force sensor 13 with the force measuring instrument; adjust the position of the outer slider 2 Make the direction of the applied force meet the requirements, and then fix the outer slider 2 on the arc-shaped guide rail 1 through the stop screw; move the arc-shaped guide rail 1 and the spherical contact 16 to the required position by rotating the fine-tuning screw left and right, Then the arc-shaped guide rail 1 is fixed on the dovetail groove slideway 4 by the stop screw, and the spherical contact 16 is fixed on the dovetail groove slideway clamp block 17 by the stop screw; The force sensor 13 can load the tested cantilever beam 10; the magnitude of the load can be read by the load cell, and the strain of the tested cantilever beam 10 can be read by the strain gauge. If pressure is to be applied, the pressing head 14 is allowed to directly contact the spherical contact 16;

Claims (4)

1. a movable type arbitrary direction loading device, it comprises base (11), is located at the fixed base (9) of base (11) one side, is fixed with tested cantilever beam (10) on the fixed base (9), The middle part of the tested cantilever beam (10) is provided with a strain gauge connected to the strain gauge, and the end of the tested cantilever beam (10) is provided with a contact position adjustment device, and the contact position adjustment device includes a dovetail groove slide clamp block (17), the sliding block matched with the dovetail slideway clamp (17) is fixed with a spherical contact (16), and the upper end surface of the dovetail slideway clamp (17) is provided with a spherical contact (16) The horizontal scale for positioning is characterized in that: the other side of the base (11) is provided with a horizontal and angular displacement loading device, and the horizontal and angular displacement loading device includes a dovetail slideway (4) fixed on the base (11) , the arc-shaped guide rail (1) matched with the dovetail slideway (4), the arc-shaped guide rail (1) is provided with an arc-shaped chute (6), and the arc-shaped chute (6) There is an outer slider (2) that can be displaced along its chute. The outer slider (2) is equipped with a worm gear (8) that is loaded by hand. The outer slider (2) is equipped with a The middle part of its position has the inner slide block (3) of strip hole, is provided with force sensor (13) on the turbine worm rod (8), is provided with exerting pressure head (14) on the force sensor (13). 2. The movable loading device in any direction according to claim 1, characterized in that: the side of the arc-shaped guide rail (1) is provided with an angle scale (12) of -90°～+90° along the circumference , the bottom of its side is provided with horizontal displacement scale (15). 3. The movable loading device in any direction according to claim 1, characterized in that: the inner slider (3) is provided with four hollow cylinders with spring pins inside, and the arc-shaped chute (6 ) is provided with a marble hole (7) to facilitate the positioning of the inner slider (3). 4. The movable loading device in any direction according to claim 1 or 2, characterized in that: a stop screw (5) is provided on the side of the arc-shaped guide rail (1) to limit its horizontal movement.